test_to_latex.py

import codecs
from datetime import datetime
from textwrap import dedent

import pytest

import pandas as pd
from pandas import (
    DataFrame,
    Series,
)
import pandas._testing as tm

pytest.importorskip("jinja2")


def _dedent(string):
    """Dedent without new line in the beginning.

    Built-in textwrap.dedent would keep new line character in the beginning
    of multi-line string starting from the new line.
    This version drops the leading new line character.
    """
    return dedent(string).lstrip()


@pytest.fixture
def df_short():
    """Short dataframe for testing table/tabular/longtable LaTeX env."""
    return DataFrame({"a": [1, 2], "b": ["b1", "b2"]})


class TestToLatex:
    def test_to_latex_to_file(self, float_frame):
        with tm.ensure_clean("test.tex") as path:
            float_frame.to_latex(path)
            with open(path, encoding="utf-8") as f:
                assert float_frame.to_latex() == f.read()

    def test_to_latex_to_file_utf8_with_encoding(self):
        # test with utf-8 and encoding option (GH 7061)
        df = DataFrame([["au\xdfgangen"]])
        with tm.ensure_clean("test.tex") as path:
            df.to_latex(path, encoding="utf-8")
            with codecs.open(path, "r", encoding="utf-8") as f:
                assert df.to_latex() == f.read()

    def test_to_latex_to_file_utf8_without_encoding(self):
        # test with utf-8 without encoding option
        df = DataFrame([["au\xdfgangen"]])
        with tm.ensure_clean("test.tex") as path:
            df.to_latex(path)
            with codecs.open(path, "r", encoding="utf-8") as f:
                assert df.to_latex() == f.read()

    def test_to_latex_tabular_with_index(self):
        df = DataFrame({"a": [1, 2], "b": ["b1", "b2"]})
        result = df.to_latex()
        expected = _dedent(
            r"""
            \begin{tabular}{lrl}
            \toprule
             & a & b \\
            \midrule
            0 & 1 & b1 \\
            1 & 2 & b2 \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    def test_to_latex_tabular_without_index(self):
        df = DataFrame({"a": [1, 2], "b": ["b1", "b2"]})
        result = df.to_latex(index=False)
        expected = _dedent(
            r"""
            \begin{tabular}{rl}
            \toprule
            a & b \\
            \midrule
            1 & b1 \\
            2 & b2 \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    @pytest.mark.parametrize(
        "bad_column_format",
        [5, 1.2, ["l", "r"], ("r", "c"), {"r", "c", "l"}, {"a": "r", "b": "l"}],
    )
    def test_to_latex_bad_column_format(self, bad_column_format):
        df = DataFrame({"a": [1, 2], "b": ["b1", "b2"]})
        msg = r"`column_format` must be str or unicode"
        with pytest.raises(ValueError, match=msg):
            df.to_latex(column_format=bad_column_format)

    def test_to_latex_column_format_just_works(self, float_frame):
        # GH Bug #9402
        float_frame.to_latex(column_format="lcr")

    def test_to_latex_column_format(self):
        df = DataFrame({"a": [1, 2], "b": ["b1", "b2"]})
        result = df.to_latex(column_format="lcr")
        expected = _dedent(
            r"""
            \begin{tabular}{lcr}
            \toprule
             & a & b \\
            \midrule
            0 & 1 & b1 \\
            1 & 2 & b2 \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    def test_to_latex_float_format_object_col(self):
        # GH#40024
        ser = Series([1000.0, "test"])
        result = ser.to_latex(float_format="{:,.0f}".format)
        expected = _dedent(
            r"""
            \begin{tabular}{ll}
            \toprule
             & 0 \\
            \midrule
            0 & 1,000 \\
            1 & test \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    def test_to_latex_empty_tabular(self):
        df = DataFrame()
        result = df.to_latex()
        expected = _dedent(
            r"""
            \begin{tabular}{l}
            \toprule
            \midrule
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    def test_to_latex_series(self):
        s = Series(["a", "b", "c"])
        result = s.to_latex()
        expected = _dedent(
            r"""
            \begin{tabular}{ll}
            \toprule
             & 0 \\
            \midrule
            0 & a \\
            1 & b \\
            2 & c \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    def test_to_latex_midrule_location(self):
        # GH 18326
        df = DataFrame({"a": [1, 2]})
        df.index.name = "foo"
        result = df.to_latex(index_names=False)
        expected = _dedent(
            r"""
            \begin{tabular}{lr}
            \toprule
             & a \\
            \midrule
            0 & 1 \\
            1 & 2 \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected


class TestToLatexLongtable:
    def test_to_latex_empty_longtable(self):
        df = DataFrame()
        result = df.to_latex(longtable=True)
        expected = _dedent(
            r"""
            \begin{longtable}{l}
            \toprule
            \midrule
            \endfirsthead
            \toprule
            \midrule
            \endhead
            \midrule
            \multicolumn{0}{r}{Continued on next page} \\
            \midrule
            \endfoot
            \bottomrule
            \endlastfoot
            \end{longtable}
            """
        )
        assert result == expected

    def test_to_latex_longtable_with_index(self):
        df = DataFrame({"a": [1, 2], "b": ["b1", "b2"]})
        result = df.to_latex(longtable=True)
        expected = _dedent(
            r"""
            \begin{longtable}{lrl}
            \toprule
             & a & b \\
            \midrule
            \endfirsthead
            \toprule
             & a & b \\
            \midrule
            \endhead
            \midrule
            \multicolumn{3}{r}{Continued on next page} \\
            \midrule
            \endfoot
            \bottomrule
            \endlastfoot
            0 & 1 & b1 \\
            1 & 2 & b2 \\
            \end{longtable}
            """
        )
        assert result == expected

    def test_to_latex_longtable_without_index(self):
        df = DataFrame({"a": [1, 2], "b": ["b1", "b2"]})
        result = df.to_latex(index=False, longtable=True)
        expected = _dedent(
            r"""
            \begin{longtable}{rl}
            \toprule
            a & b \\
            \midrule
            \endfirsthead
            \toprule
            a & b \\
            \midrule
            \endhead
            \midrule
            \multicolumn{2}{r}{Continued on next page} \\
            \midrule
            \endfoot
            \bottomrule
            \endlastfoot
            1 & b1 \\
            2 & b2 \\
            \end{longtable}
            """
        )
        assert result == expected

    @pytest.mark.parametrize(
        "df, expected_number",
        [
            (DataFrame({"a": [1, 2]}), 1),
            (DataFrame({"a": [1, 2], "b": [3, 4]}), 2),
            (DataFrame({"a": [1, 2], "b": [3, 4], "c": [5, 6]}), 3),
        ],
    )
    def test_to_latex_longtable_continued_on_next_page(self, df, expected_number):
        result = df.to_latex(index=False, longtable=True)
        assert rf"\multicolumn{{{expected_number}}}" in result


class TestToLatexHeader:
    def test_to_latex_no_header_with_index(self):
        # GH 7124
        df = DataFrame({"a": [1, 2], "b": ["b1", "b2"]})
        result = df.to_latex(header=False)
        expected = _dedent(
            r"""
            \begin{tabular}{lrl}
            \toprule
            \midrule
            0 & 1 & b1 \\
            1 & 2 & b2 \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    def test_to_latex_no_header_without_index(self):
        # GH 7124
        df = DataFrame({"a": [1, 2], "b": ["b1", "b2"]})
        result = df.to_latex(index=False, header=False)
        expected = _dedent(
            r"""
            \begin{tabular}{rl}
            \toprule
            \midrule
            1 & b1 \\
            2 & b2 \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    def test_to_latex_specified_header_with_index(self):
        # GH 7124
        df = DataFrame({"a": [1, 2], "b": ["b1", "b2"]})
        result = df.to_latex(header=["AA", "BB"])
        expected = _dedent(
            r"""
            \begin{tabular}{lrl}
            \toprule
             & AA & BB \\
            \midrule
            0 & 1 & b1 \\
            1 & 2 & b2 \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    def test_to_latex_specified_header_without_index(self):
        # GH 7124
        df = DataFrame({"a": [1, 2], "b": ["b1", "b2"]})
        result = df.to_latex(header=["AA", "BB"], index=False)
        expected = _dedent(
            r"""
            \begin{tabular}{rl}
            \toprule
            AA & BB \\
            \midrule
            1 & b1 \\
            2 & b2 \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    @pytest.mark.parametrize(
        "header, num_aliases",
        [
            (["A"], 1),
            (("B",), 1),
            (("Col1", "Col2", "Col3"), 3),
            (("Col1", "Col2", "Col3", "Col4"), 4),
        ],
    )
    def test_to_latex_number_of_items_in_header_missmatch_raises(
        self,
        header,
        num_aliases,
    ):
        # GH 7124
        df = DataFrame({"a": [1, 2], "b": ["b1", "b2"]})
        msg = f"Writing 2 cols but got {num_aliases} aliases"
        with pytest.raises(ValueError, match=msg):
            df.to_latex(header=header)

    def test_to_latex_decimal(self):
        # GH 12031
        df = DataFrame({"a": [1.0, 2.1], "b": ["b1", "b2"]})
        result = df.to_latex(decimal=",")
        expected = _dedent(
            r"""
            \begin{tabular}{lrl}
            \toprule
             & a & b \\
            \midrule
            0 & 1,000000 & b1 \\
            1 & 2,100000 & b2 \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected


class TestToLatexBold:
    def test_to_latex_bold_rows(self):
        # GH 16707
        df = DataFrame({"a": [1, 2], "b": ["b1", "b2"]})
        result = df.to_latex(bold_rows=True)
        expected = _dedent(
            r"""
            \begin{tabular}{lrl}
            \toprule
             & a & b \\
            \midrule
            \textbf{0} & 1 & b1 \\
            \textbf{1} & 2 & b2 \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    def test_to_latex_no_bold_rows(self):
        # GH 16707
        df = DataFrame({"a": [1, 2], "b": ["b1", "b2"]})
        result = df.to_latex(bold_rows=False)
        expected = _dedent(
            r"""
            \begin{tabular}{lrl}
            \toprule
             & a & b \\
            \midrule
            0 & 1 & b1 \\
            1 & 2 & b2 \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected


class TestToLatexCaptionLabel:
    @pytest.fixture
    def caption_table(self):
        """Caption for table/tabular LaTeX environment."""
        return "a table in a \\texttt{table/tabular} environment"

    @pytest.fixture
    def short_caption(self):
        """Short caption for testing \\caption[short_caption]{full_caption}."""
        return "a table"

    @pytest.fixture
    def label_table(self):
        """Label for table/tabular LaTeX environment."""
        return "tab:table_tabular"

    @pytest.fixture
    def caption_longtable(self):
        """Caption for longtable LaTeX environment."""
        return "a table in a \\texttt{longtable} environment"

    @pytest.fixture
    def label_longtable(self):
        """Label for longtable LaTeX environment."""
        return "tab:longtable"

    def test_to_latex_caption_only(self, df_short, caption_table):
        # GH 25436
        result = df_short.to_latex(caption=caption_table)
        expected = _dedent(
            r"""
            \begin{table}
            \caption{a table in a \texttt{table/tabular} environment}
            \begin{tabular}{lrl}
            \toprule
             & a & b \\
            \midrule
            0 & 1 & b1 \\
            1 & 2 & b2 \\
            \bottomrule
            \end{tabular}
            \end{table}
            """
        )
        assert result == expected

    def test_to_latex_label_only(self, df_short, label_table):
        # GH 25436
        result = df_short.to_latex(label=label_table)
        expected = _dedent(
            r"""
            \begin{table}
            \label{tab:table_tabular}
            \begin{tabular}{lrl}
            \toprule
             & a & b \\
            \midrule
            0 & 1 & b1 \\
            1 & 2 & b2 \\
            \bottomrule
            \end{tabular}
            \end{table}
            """
        )
        assert result == expected

    def test_to_latex_caption_and_label(self, df_short, caption_table, label_table):
        # GH 25436
        result = df_short.to_latex(caption=caption_table, label=label_table)
        expected = _dedent(
            r"""
            \begin{table}
            \caption{a table in a \texttt{table/tabular} environment}
            \label{tab:table_tabular}
            \begin{tabular}{lrl}
            \toprule
             & a & b \\
            \midrule
            0 & 1 & b1 \\
            1 & 2 & b2 \\
            \bottomrule
            \end{tabular}
            \end{table}
            """
        )
        assert result == expected

    def test_to_latex_caption_and_shortcaption(
        self,
        df_short,
        caption_table,
        short_caption,
    ):
        result = df_short.to_latex(caption=(caption_table, short_caption))
        expected = _dedent(
            r"""
            \begin{table}
            \caption[a table]{a table in a \texttt{table/tabular} environment}
            \begin{tabular}{lrl}
            \toprule
             & a & b \\
            \midrule
            0 & 1 & b1 \\
            1 & 2 & b2 \\
            \bottomrule
            \end{tabular}
            \end{table}
            """
        )
        assert result == expected

    def test_to_latex_caption_and_shortcaption_list_is_ok(self, df_short):
        caption = ("Long-long-caption", "Short")
        result_tuple = df_short.to_latex(caption=caption)
        result_list = df_short.to_latex(caption=list(caption))
        assert result_tuple == result_list

    def test_to_latex_caption_shortcaption_and_label(
        self,
        df_short,
        caption_table,
        short_caption,
        label_table,
    ):
        # test when the short_caption is provided alongside caption and label
        result = df_short.to_latex(
            caption=(caption_table, short_caption),
            label=label_table,
        )
        expected = _dedent(
            r"""
            \begin{table}
            \caption[a table]{a table in a \texttt{table/tabular} environment}
            \label{tab:table_tabular}
            \begin{tabular}{lrl}
            \toprule
             & a & b \\
            \midrule
            0 & 1 & b1 \\
            1 & 2 & b2 \\
            \bottomrule
            \end{tabular}
            \end{table}
            """
        )
        assert result == expected

    @pytest.mark.parametrize(
        "bad_caption",
        [
            ("full_caption", "short_caption", "extra_string"),
            ("full_caption", "short_caption", 1),
            ("full_caption", "short_caption", None),
            ("full_caption",),
            (None,),
        ],
    )
    def test_to_latex_bad_caption_raises(self, bad_caption):
        # test that wrong number of params is raised
        df = DataFrame({"a": [1]})
        msg = "`caption` must be either a string or 2-tuple of strings"
        with pytest.raises(ValueError, match=msg):
            df.to_latex(caption=bad_caption)

    def test_to_latex_two_chars_caption(self, df_short):
        # test that two chars caption is handled correctly
        # it must not be unpacked into long_caption, short_caption.
        result = df_short.to_latex(caption="xy")
        expected = _dedent(
            r"""
            \begin{table}
            \caption{xy}
            \begin{tabular}{lrl}
            \toprule
             & a & b \\
            \midrule
            0 & 1 & b1 \\
            1 & 2 & b2 \\
            \bottomrule
            \end{tabular}
            \end{table}
            """
        )
        assert result == expected

    def test_to_latex_longtable_caption_only(self, df_short, caption_longtable):
        # GH 25436
        # test when no caption and no label is provided
        # is performed by test_to_latex_longtable()
        result = df_short.to_latex(longtable=True, caption=caption_longtable)
        expected = _dedent(
            r"""
            \begin{longtable}{lrl}
            \caption{a table in a \texttt{longtable} environment} \\
            \toprule
             & a & b \\
            \midrule
            \endfirsthead
            \caption[]{a table in a \texttt{longtable} environment} \\
            \toprule
             & a & b \\
            \midrule
            \endhead
            \midrule
            \multicolumn{3}{r}{Continued on next page} \\
            \midrule
            \endfoot
            \bottomrule
            \endlastfoot
            0 & 1 & b1 \\
            1 & 2 & b2 \\
            \end{longtable}
            """
        )
        assert result == expected

    def test_to_latex_longtable_label_only(self, df_short, label_longtable):
        # GH 25436
        result = df_short.to_latex(longtable=True, label=label_longtable)
        expected = _dedent(
            r"""
            \begin{longtable}{lrl}
            \label{tab:longtable} \\
            \toprule
             & a & b \\
            \midrule
            \endfirsthead
            \toprule
             & a & b \\
            \midrule
            \endhead
            \midrule
            \multicolumn{3}{r}{Continued on next page} \\
            \midrule
            \endfoot
            \bottomrule
            \endlastfoot
            0 & 1 & b1 \\
            1 & 2 & b2 \\
            \end{longtable}
            """
        )
        assert result == expected

    def test_to_latex_longtable_caption_and_label(
        self,
        df_short,
        caption_longtable,
        label_longtable,
    ):
        # GH 25436
        result = df_short.to_latex(
            longtable=True,
            caption=caption_longtable,
            label=label_longtable,
        )
        expected = _dedent(
            r"""
        \begin{longtable}{lrl}
        \caption{a table in a \texttt{longtable} environment} \label{tab:longtable} \\
        \toprule
         & a & b \\
        \midrule
        \endfirsthead
        \caption[]{a table in a \texttt{longtable} environment} \\
        \toprule
         & a & b \\
        \midrule
        \endhead
        \midrule
        \multicolumn{3}{r}{Continued on next page} \\
        \midrule
        \endfoot
        \bottomrule
        \endlastfoot
        0 & 1 & b1 \\
        1 & 2 & b2 \\
        \end{longtable}
        """
        )
        assert result == expected

    def test_to_latex_longtable_caption_shortcaption_and_label(
        self,
        df_short,
        caption_longtable,
        short_caption,
        label_longtable,
    ):
        # test when the caption, the short_caption and the label are provided
        result = df_short.to_latex(
            longtable=True,
            caption=(caption_longtable, short_caption),
            label=label_longtable,
        )
        expected = _dedent(
            r"""
\begin{longtable}{lrl}
\caption[a table]{a table in a \texttt{longtable} environment} \label{tab:longtable} \\
\toprule
 & a & b \\
\midrule
\endfirsthead
\caption[]{a table in a \texttt{longtable} environment} \\
\toprule
 & a & b \\
\midrule
\endhead
\midrule
\multicolumn{3}{r}{Continued on next page} \\
\midrule
\endfoot
\bottomrule
\endlastfoot
0 & 1 & b1 \\
1 & 2 & b2 \\
\end{longtable}
"""
        )
        assert result == expected


class TestToLatexEscape:
    @pytest.fixture
    def df_with_symbols(self):
        """Dataframe with special characters for testing chars escaping."""
        a = "a"
        b = "b"
        yield DataFrame({"co$e^x$": {a: "a", b: "b"}, "co^l1": {a: "a", b: "b"}})

    def test_to_latex_escape_false(self, df_with_symbols):
        result = df_with_symbols.to_latex(escape=False)
        expected = _dedent(
            r"""
            \begin{tabular}{lll}
            \toprule
             & co$e^x$ & co^l1 \\
            \midrule
            a & a & a \\
            b & b & b \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    def test_to_latex_escape_default(self, df_with_symbols):
        # gh50871: in v2.0 escape is False by default (styler.format.escape=None)
        default = df_with_symbols.to_latex()
        specified_true = df_with_symbols.to_latex(escape=True)
        assert default != specified_true

    def test_to_latex_special_escape(self):
        df = DataFrame([r"a\b\c", r"^a^b^c", r"~a~b~c"])
        result = df.to_latex(escape=True)
        expected = _dedent(
            r"""
            \begin{tabular}{ll}
            \toprule
             & 0 \\
            \midrule
            0 & a\textbackslash b\textbackslash c \\
            1 & \textasciicircum a\textasciicircum b\textasciicircum c \\
            2 & \textasciitilde a\textasciitilde b\textasciitilde c \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    def test_to_latex_escape_special_chars(self):
        special_characters = ["&", "%", "$", "#", "_", "{", "}", "~", "^", "\\"]
        df = DataFrame(data=special_characters)
        result = df.to_latex(escape=True)
        expected = _dedent(
            r"""
            \begin{tabular}{ll}
            \toprule
             & 0 \\
            \midrule
            0 & \& \\
            1 & \% \\
            2 & \$ \\
            3 & \# \\
            4 & \_ \\
            5 & \{ \\
            6 & \} \\
            7 & \textasciitilde  \\
            8 & \textasciicircum  \\
            9 & \textbackslash  \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    def test_to_latex_specified_header_special_chars_without_escape(self):
        # GH 7124
        df = DataFrame({"a": [1, 2], "b": ["b1", "b2"]})
        result = df.to_latex(header=["$A$", "$B$"], escape=False)
        expected = _dedent(
            r"""
            \begin{tabular}{lrl}
            \toprule
             & $A$ & $B$ \\
            \midrule
            0 & 1 & b1 \\
            1 & 2 & b2 \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected


class TestToLatexPosition:
    def test_to_latex_position(self):
        the_position = "h"
        df = DataFrame({"a": [1, 2], "b": ["b1", "b2"]})
        result = df.to_latex(position=the_position)
        expected = _dedent(
            r"""
            \begin{table}[h]
            \begin{tabular}{lrl}
            \toprule
             & a & b \\
            \midrule
            0 & 1 & b1 \\
            1 & 2 & b2 \\
            \bottomrule
            \end{tabular}
            \end{table}
            """
        )
        assert result == expected

    def test_to_latex_longtable_position(self):
        the_position = "t"
        df = DataFrame({"a": [1, 2], "b": ["b1", "b2"]})
        result = df.to_latex(longtable=True, position=the_position)
        expected = _dedent(
            r"""
            \begin{longtable}[t]{lrl}
            \toprule
             & a & b \\
            \midrule
            \endfirsthead
            \toprule
             & a & b \\
            \midrule
            \endhead
            \midrule
            \multicolumn{3}{r}{Continued on next page} \\
            \midrule
            \endfoot
            \bottomrule
            \endlastfoot
            0 & 1 & b1 \\
            1 & 2 & b2 \\
            \end{longtable}
            """
        )
        assert result == expected


class TestToLatexFormatters:
    def test_to_latex_with_formatters(self):
        df = DataFrame(
            {
                "datetime64": [
                    datetime(2016, 1, 1),
                    datetime(2016, 2, 5),
                    datetime(2016, 3, 3),
                ],
                "float": [1.0, 2.0, 3.0],
                "int": [1, 2, 3],
                "object": [(1, 2), True, False],
            }
        )

        formatters = {
            "datetime64": lambda x: x.strftime("%Y-%m"),
            "float": lambda x: f"[{x: 4.1f}]",
            "int": lambda x: f"0x{x:x}",
            "object": lambda x: f"-{x!s}-",
            "__index__": lambda x: f"index: {x}",
        }
        result = df.to_latex(formatters=dict(formatters))

        expected = _dedent(
            r"""
            \begin{tabular}{llrrl}
            \toprule
             & datetime64 & float & int & object \\
            \midrule
            index: 0 & 2016-01 & [ 1.0] & 0x1 & -(1, 2)- \\
            index: 1 & 2016-02 & [ 2.0] & 0x2 & -True- \\
            index: 2 & 2016-03 & [ 3.0] & 0x3 & -False- \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    def test_to_latex_float_format_no_fixed_width_3decimals(self):
        # GH 21625
        df = DataFrame({"x": [0.19999]})
        result = df.to_latex(float_format="%.3f")
        expected = _dedent(
            r"""
            \begin{tabular}{lr}
            \toprule
             & x \\
            \midrule
            0 & 0.200 \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    def test_to_latex_float_format_no_fixed_width_integer(self):
        # GH 22270
        df = DataFrame({"x": [100.0]})
        result = df.to_latex(float_format="%.0f")
        expected = _dedent(
            r"""
            \begin{tabular}{lr}
            \toprule
             & x \\
            \midrule
            0 & 100 \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    @pytest.mark.parametrize("na_rep", ["NaN", "Ted"])
    def test_to_latex_na_rep_and_float_format(self, na_rep):
        df = DataFrame(
            [
                ["A", 1.2225],
                ["A", None],
            ],
            columns=["Group", "Data"],
        )
        result = df.to_latex(na_rep=na_rep, float_format="{:.2f}".format)
        expected = _dedent(
            rf"""
            \begin{{tabular}}{{llr}}
            \toprule
             & Group & Data \\
            \midrule
            0 & A & 1.22 \\
            1 & A & {na_rep} \\
            \bottomrule
            \end{{tabular}}
            """
        )
        assert result == expected


class TestToLatexMultiindex:
    @pytest.fixture
    def multiindex_frame(self):
        """Multiindex dataframe for testing multirow LaTeX macros."""
        yield DataFrame.from_dict(
            {
                ("c1", 0): Series({x: x for x in range(4)}),
                ("c1", 1): Series({x: x + 4 for x in range(4)}),
                ("c2", 0): Series({x: x for x in range(4)}),
                ("c2", 1): Series({x: x + 4 for x in range(4)}),
                ("c3", 0): Series({x: x for x in range(4)}),
            }
        ).T

    @pytest.fixture
    def multicolumn_frame(self):
        """Multicolumn dataframe for testing multicolumn LaTeX macros."""
        yield DataFrame(
            {
                ("c1", 0): {x: x for x in range(5)},
                ("c1", 1): {x: x + 5 for x in range(5)},
                ("c2", 0): {x: x for x in range(5)},
                ("c2", 1): {x: x + 5 for x in range(5)},
                ("c3", 0): {x: x for x in range(5)},
            }
        )

    def test_to_latex_multindex_header(self):
        # GH 16718
        df = DataFrame({"a": [0], "b": [1], "c": [2], "d": [3]})
        df = df.set_index(["a", "b"])
        observed = df.to_latex(header=["r1", "r2"], multirow=False)
        expected = _dedent(
            r"""
            \begin{tabular}{llrr}
            \toprule
             &  & r1 & r2 \\
            a & b &  &  \\
            \midrule
            0 & 1 & 2 & 3 \\
            \bottomrule
            \end{tabular}
            """
        )
        assert observed == expected

    def test_to_latex_multiindex_empty_name(self):
        # GH 18669
        mi = pd.MultiIndex.from_product([[1, 2]], names=[""])
        df = DataFrame(-1, index=mi, columns=range(4))
        observed = df.to_latex()
        expected = _dedent(
            r"""
            \begin{tabular}{lrrrr}
            \toprule
             & 0 & 1 & 2 & 3 \\
             &  &  &  &  \\
            \midrule
            1 & -1 & -1 & -1 & -1 \\
            2 & -1 & -1 & -1 & -1 \\
            \bottomrule
            \end{tabular}
            """
        )
        assert observed == expected

    def test_to_latex_multiindex_column_tabular(self):
        df = DataFrame({("x", "y"): ["a"]})
        result = df.to_latex()
        expected = _dedent(
            r"""
            \begin{tabular}{ll}
            \toprule
             & x \\
             & y \\
            \midrule
            0 & a \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    def test_to_latex_multiindex_small_tabular(self):
        df = DataFrame({("x", "y"): ["a"]}).T
        result = df.to_latex(multirow=False)
        expected = _dedent(
            r"""
            \begin{tabular}{lll}
            \toprule
             &  & 0 \\
            \midrule
            x & y & a \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    def test_to_latex_multiindex_tabular(self, multiindex_frame):
        result = multiindex_frame.to_latex(multirow=False)
        expected = _dedent(
            r"""
            \begin{tabular}{llrrrr}
            \toprule
             &  & 0 & 1 & 2 & 3 \\
            \midrule
            c1 & 0 & 0 & 1 & 2 & 3 \\
             & 1 & 4 & 5 & 6 & 7 \\
            c2 & 0 & 0 & 1 & 2 & 3 \\
             & 1 & 4 & 5 & 6 & 7 \\
            c3 & 0 & 0 & 1 & 2 & 3 \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    def test_to_latex_multicolumn_tabular(self, multiindex_frame):
        # GH 14184
        df = multiindex_frame.T
        df.columns.names = ["a", "b"]
        result = df.to_latex(multirow=False)
        expected = _dedent(
            r"""
            \begin{tabular}{lrrrrr}
            \toprule
            a & \multicolumn{2}{r}{c1} & \multicolumn{2}{r}{c2} & c3 \\
            b & 0 & 1 & 0 & 1 & 0 \\
            \midrule
            0 & 0 & 4 & 0 & 4 & 0 \\
            1 & 1 & 5 & 1 & 5 & 1 \\
            2 & 2 & 6 & 2 & 6 & 2 \\
            3 & 3 & 7 & 3 & 7 & 3 \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    def test_to_latex_index_has_name_tabular(self):
        # GH 10660
        df = DataFrame({"a": [0, 0, 1, 1], "b": list("abab"), "c": [1, 2, 3, 4]})
        result = df.set_index(["a", "b"]).to_latex(multirow=False)
        expected = _dedent(
            r"""
            \begin{tabular}{llr}
            \toprule
             &  & c \\
            a & b &  \\
            \midrule
            0 & a & 1 \\
             & b & 2 \\
            1 & a & 3 \\
             & b & 4 \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    def test_to_latex_groupby_tabular(self):
        # GH 10660
        df = DataFrame({"a": [0, 0, 1, 1], "b": list("abab"), "c": [1, 2, 3, 4]})
        result = (
            df.groupby("a")
            .describe()
            .to_latex(float_format="{:.1f}".format, escape=True)
        )
        expected = _dedent(
            r"""
            \begin{tabular}{lrrrrrrrr}
            \toprule
             & \multicolumn{8}{r}{c} \\
             & count & mean & std & min & 25\% & 50\% & 75\% & max \\
            a &  &  &  &  &  &  &  &  \\
            \midrule
            0 & 2.0 & 1.5 & 0.7 & 1.0 & 1.2 & 1.5 & 1.8 & 2.0 \\
            1 & 2.0 & 3.5 & 0.7 & 3.0 & 3.2 & 3.5 & 3.8 & 4.0 \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    def test_to_latex_multiindex_dupe_level(self):
        # see gh-14484
        #
        # If an index is repeated in subsequent rows, it should be
        # replaced with a blank in the created table. This should
        # ONLY happen if all higher order indices (to the left) are
        # equal too. In this test, 'c' has to be printed both times
        # because the higher order index 'A' != 'B'.
        df = DataFrame(
            index=pd.MultiIndex.from_tuples([("A", "c"), ("B", "c")]), columns=["col"]
        )
        result = df.to_latex(multirow=False)
        expected = _dedent(
            r"""
            \begin{tabular}{lll}
            \toprule
             &  & col \\
            \midrule
            A & c & NaN \\
            B & c & NaN \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    def test_to_latex_multicolumn_default(self, multicolumn_frame):
        result = multicolumn_frame.to_latex()
        expected = _dedent(
            r"""
            \begin{tabular}{lrrrrr}
            \toprule
             & \multicolumn{2}{r}{c1} & \multicolumn{2}{r}{c2} & c3 \\
             & 0 & 1 & 0 & 1 & 0 \\
            \midrule
            0 & 0 & 5 & 0 & 5 & 0 \\
            1 & 1 & 6 & 1 & 6 & 1 \\
            2 & 2 & 7 & 2 & 7 & 2 \\
            3 & 3 & 8 & 3 & 8 & 3 \\
            4 & 4 & 9 & 4 & 9 & 4 \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    def test_to_latex_multicolumn_false(self, multicolumn_frame):
        result = multicolumn_frame.to_latex(multicolumn=False, multicolumn_format="l")
        expected = _dedent(
            r"""
            \begin{tabular}{lrrrrr}
            \toprule
             & c1 & & c2 & & c3 \\
             & 0 & 1 & 0 & 1 & 0 \\
            \midrule
            0 & 0 & 5 & 0 & 5 & 0 \\
            1 & 1 & 6 & 1 & 6 & 1 \\
            2 & 2 & 7 & 2 & 7 & 2 \\
            3 & 3 & 8 & 3 & 8 & 3 \\
            4 & 4 & 9 & 4 & 9 & 4 \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    def test_to_latex_multirow_true(self, multicolumn_frame):
        result = multicolumn_frame.T.to_latex(multirow=True)
        expected = _dedent(
            r"""
            \begin{tabular}{llrrrrr}
            \toprule
             &  & 0 & 1 & 2 & 3 & 4 \\
            \midrule
            \multirow[t]{2}{*}{c1} & 0 & 0 & 1 & 2 & 3 & 4 \\
             & 1 & 5 & 6 & 7 & 8 & 9 \\
            \cline{1-7}
            \multirow[t]{2}{*}{c2} & 0 & 0 & 1 & 2 & 3 & 4 \\
             & 1 & 5 & 6 & 7 & 8 & 9 \\
            \cline{1-7}
            c3 & 0 & 0 & 1 & 2 & 3 & 4 \\
            \cline{1-7}
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    def test_to_latex_multicolumnrow_with_multicol_format(self, multicolumn_frame):
        multicolumn_frame.index = multicolumn_frame.T.index
        result = multicolumn_frame.T.to_latex(
            multirow=True,
            multicolumn=True,
            multicolumn_format="c",
        )
        expected = _dedent(
            r"""
            \begin{tabular}{llrrrrr}
            \toprule
             &  & \multicolumn{2}{c}{c1} & \multicolumn{2}{c}{c2} & c3 \\
             &  & 0 & 1 & 0 & 1 & 0 \\
            \midrule
            \multirow[t]{2}{*}{c1} & 0 & 0 & 1 & 2 & 3 & 4 \\
             & 1 & 5 & 6 & 7 & 8 & 9 \\
            \cline{1-7}
            \multirow[t]{2}{*}{c2} & 0 & 0 & 1 & 2 & 3 & 4 \\
             & 1 & 5 & 6 & 7 & 8 & 9 \\
            \cline{1-7}
            c3 & 0 & 0 & 1 & 2 & 3 & 4 \\
            \cline{1-7}
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    @pytest.mark.parametrize("name0", [None, "named0"])
    @pytest.mark.parametrize("name1", [None, "named1"])
    @pytest.mark.parametrize("axes", [[0], [1], [0, 1]])
    def test_to_latex_multiindex_names(self, name0, name1, axes):
        # GH 18667
        names = [name0, name1]
        mi = pd.MultiIndex.from_product([[1, 2], [3, 4]])
        df = DataFrame(-1, index=mi.copy(), columns=mi.copy())
        for idx in axes:
            df.axes[idx].names = names

        idx_names = tuple(n or "" for n in names)
        idx_names_row = (
            f"{idx_names[0]} & {idx_names[1]} &  &  &  &  \\\\\n"
            if (0 in axes and any(names))
            else ""
        )
        col_names = [n if (bool(n) and 1 in axes) else "" for n in names]
        observed = df.to_latex(multirow=False)
        # pylint: disable-next=consider-using-f-string
        expected = r"""\begin{tabular}{llrrrr}
\toprule
 & %s & \multicolumn{2}{r}{1} & \multicolumn{2}{r}{2} \\
 & %s & 3 & 4 & 3 & 4 \\
%s\midrule
1 & 3 & -1 & -1 & -1 & -1 \\
 & 4 & -1 & -1 & -1 & -1 \\
2 & 3 & -1 & -1 & -1 & -1 \\
 & 4 & -1 & -1 & -1 & -1 \\
\bottomrule
\end{tabular}
""" % tuple(
            list(col_names) + [idx_names_row]
        )
        assert observed == expected

    @pytest.mark.parametrize("one_row", [True, False])
    def test_to_latex_multiindex_nans(self, one_row):
        # GH 14249
        df = DataFrame({"a": [None, 1], "b": [2, 3], "c": [4, 5]})
        if one_row:
            df = df.iloc[[0]]
        observed = df.set_index(["a", "b"]).to_latex(multirow=False)
        expected = _dedent(
            r"""
            \begin{tabular}{llr}
            \toprule
             &  & c \\
            a & b &  \\
            \midrule
            NaN & 2 & 4 \\
            """
        )
        if not one_row:
            expected += r"""1.000000 & 3 & 5 \\
"""
        expected += r"""\bottomrule
\end{tabular}
"""
        assert observed == expected

    def test_to_latex_non_string_index(self):
        # GH 19981
        df = DataFrame([[1, 2, 3]] * 2).set_index([0, 1])
        result = df.to_latex(multirow=False)
        expected = _dedent(
            r"""
            \begin{tabular}{llr}
            \toprule
             &  & 2 \\
            0 & 1 &  \\
            \midrule
            1 & 2 & 3 \\
             & 2 & 3 \\
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected

    def test_to_latex_multiindex_multirow(self):
        # GH 16719
        mi = pd.MultiIndex.from_product(
            [[0.0, 1.0], [3.0, 2.0, 1.0], ["0", "1"]], names=["i", "val0", "val1"]
        )
        df = DataFrame(index=mi)
        result = df.to_latex(multirow=True, escape=False)
        expected = _dedent(
            r"""
            \begin{tabular}{lll}
            \toprule
            i & val0 & val1 \\
            \midrule
            \multirow[t]{6}{*}{0.000000} & \multirow[t]{2}{*}{3.000000} & 0 \\
             &  & 1 \\
            \cline{2-3}
             & \multirow[t]{2}{*}{2.000000} & 0 \\
             &  & 1 \\
            \cline{2-3}
             & \multirow[t]{2}{*}{1.000000} & 0 \\
             &  & 1 \\
            \cline{1-3} \cline{2-3}
            \multirow[t]{6}{*}{1.000000} & \multirow[t]{2}{*}{3.000000} & 0 \\
             &  & 1 \\
            \cline{2-3}
             & \multirow[t]{2}{*}{2.000000} & 0 \\
             &  & 1 \\
            \cline{2-3}
             & \multirow[t]{2}{*}{1.000000} & 0 \\
             &  & 1 \\
            \cline{1-3} \cline{2-3}
            \bottomrule
            \end{tabular}
            """
        )
        assert result == expected


def test_to_latex_exceeding_float_point_double():
    df = DataFrame(data=[[1234567890123456789]], columns=["test"])
    expected = _dedent(
        r"""
        \begin{tabular}{lr}
         & test \\
        0 & 1234567890123456789 \\
        \end{tabular}
        """
    )
    assert df.style.to_latex() == expected