diff --git a/pandas/tests/io/formats/test_to_latex.py b/pandas/tests/io/formats/test_to_latex.py index 8df8796d236a5..7a0d305758802 100644 --- a/pandas/tests/io/formats/test_to_latex.py +++ b/pandas/tests/io/formats/test_to_latex.py @@ -1,5 +1,6 @@ import codecs from datetime import datetime +from textwrap import dedent import pytest @@ -16,14 +17,82 @@ ) +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() + + class TestToLatex: - def test_to_latex_filename(self, float_frame): + @pytest.fixture + def df_short(self): + """Short dataframe for testing table/tabular/longtable LaTeX env.""" + return DataFrame({"a": [1, 2], "b": ["b1", "b2"]}) + + @pytest.fixture + def caption_table(self): + """Caption for table/tabular LaTeX environment.""" + return "a table in a \\texttt{table/tabular} environment" + + @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" + + @pytest.fixture + def multiindex_frame(self): + """Multiindex dataframe for testing multirow LaTeX macros.""" + yield DataFrame.from_dict( + { + ("c1", 0): pd.Series({x: x for x in range(4)}), + ("c1", 1): pd.Series({x: x + 4 for x in range(4)}), + ("c2", 0): pd.Series({x: x for x in range(4)}), + ("c2", 1): pd.Series({x: x + 4 for x in range(4)}), + ("c3", 0): pd.Series({x: x for x in range(4)}), + } + ).T + + @pytest.fixture + def multicolumn_frame(self): + """Multicolumn dataframe for testing multicolumn LaTeX macros.""" + yield pd.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)}, + } + ) + + @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_to_file(self, float_frame): with tm.ensure_clean("test.tex") as path: float_frame.to_latex(path) - with open(path) 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: @@ -31,42 +100,47 @@ def test_to_latex_filename(self, float_frame): 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(self, float_frame): - # it works! - float_frame.to_latex() - + def test_to_latex_tabular_with_index(self): df = DataFrame({"a": [1, 2], "b": ["b1", "b2"]}) - withindex_result = df.to_latex() - withindex_expected = r"""\begin{tabular}{lrl} -\toprule -{} & a & b \\ -\midrule -0 & 1 & b1 \\ -1 & 2 & b2 \\ -\bottomrule -\end{tabular} -""" - - assert withindex_result == withindex_expected - - withoutindex_result = df.to_latex(index=False) - withoutindex_expected = r"""\begin{tabular}{rl} -\toprule - a & b \\ -\midrule - 1 & b1 \\ - 2 & b2 \\ -\bottomrule -\end{tabular} -""" + 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 - assert withoutindex_result == withoutindex_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", @@ -78,45 +152,55 @@ def test_to_latex_bad_column_format(self, bad_column_format): with pytest.raises(ValueError, match=msg): df.to_latex(column_format=bad_column_format) - def test_to_latex_format(self, float_frame): + def test_to_latex_column_format(self, float_frame): # GH Bug #9402 - float_frame.to_latex(column_format="ccc") + float_frame.to_latex(column_format="lcr") df = DataFrame({"a": [1, 2], "b": ["b1", "b2"]}) - withindex_result = df.to_latex(column_format="ccc") - withindex_expected = r"""\begin{tabular}{ccc} -\toprule -{} & a & b \\ -\midrule -0 & 1 & b1 \\ -1 & 2 & b2 \\ -\bottomrule -\end{tabular} -""" - - assert withindex_result == withindex_expected + 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_empty(self): + def test_to_latex_empty_tabular(self): df = DataFrame() result = df.to_latex() - expected = r"""\begin{tabular}{l} -\toprule -Empty DataFrame -Columns: Index([], dtype='object') -Index: Index([], dtype='object') \\ -\bottomrule -\end{tabular} -""" + expected = _dedent( + r""" + \begin{tabular}{l} + \toprule + Empty DataFrame + Columns: Index([], dtype='object') + Index: Index([], dtype='object') \\ + \bottomrule + \end{tabular} + """ + ) assert result == expected + def test_to_latex_empty_longtable(self): + df = DataFrame() result = df.to_latex(longtable=True) - expected = r"""\begin{longtable}{l} -\toprule -Empty DataFrame -Columns: Index([], dtype='object') -Index: Index([], dtype='object') \\ -\end{longtable} -""" + expected = _dedent( + r""" + \begin{longtable}{l} + \toprule + Empty DataFrame + Columns: Index([], dtype='object') + Index: Index([], dtype='object') \\ + \end{longtable} + """ + ) assert result == expected def test_to_latex_with_formatters(self): @@ -142,119 +226,134 @@ def test_to_latex_with_formatters(self): } result = df.to_latex(formatters=dict(formatters)) - expected = 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} -""" + 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_multiindex(self): + def test_to_latex_multiindex_column_tabular(self): df = DataFrame({("x", "y"): ["a"]}) result = df.to_latex() - expected = r"""\begin{tabular}{ll} -\toprule -{} & x \\ -{} & y \\ -\midrule -0 & a \\ -\bottomrule -\end{tabular} -""" - + 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"]}) result = df.T.to_latex() - expected = r"""\begin{tabular}{lll} -\toprule - & & 0 \\ -\midrule -x & y & a \\ -\bottomrule -\end{tabular} -""" - + expected = _dedent( + r""" + \begin{tabular}{lll} + \toprule + & & 0 \\ + \midrule + x & y & a \\ + \bottomrule + \end{tabular} + """ + ) assert result == expected - df = DataFrame.from_dict( - { - ("c1", 0): pd.Series({x: x for x in range(4)}), - ("c1", 1): pd.Series({x: x + 4 for x in range(4)}), - ("c2", 0): pd.Series({x: x for x in range(4)}), - ("c2", 1): pd.Series({x: x + 4 for x in range(4)}), - ("c3", 0): pd.Series({x: x for x in range(4)}), - } - ).T - result = df.to_latex() - expected = 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} -""" - + def test_to_latex_multiindex_tabular(self, multiindex_frame): + result = multiindex_frame.to_latex() + 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 = df.T + df = multiindex_frame.T df.columns.names = ["a", "b"] result = df.to_latex() - expected = r"""\begin{tabular}{lrrrrr} -\toprule -a & \multicolumn{2}{l}{c1} & \multicolumn{2}{l}{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} -""" + expected = _dedent( + r""" + \begin{tabular}{lrrrrr} + \toprule + a & \multicolumn{2}{l}{c1} & \multicolumn{2}{l}{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 = pd.DataFrame({"a": [0, 0, 1, 1], "b": list("abab"), "c": [1, 2, 3, 4]}) result = df.set_index(["a", "b"]).to_latex() - expected = r"""\begin{tabular}{llr} -\toprule - & & c \\ -a & b & \\ -\midrule -0 & a & 1 \\ - & b & 2 \\ -1 & a & 3 \\ - & b & 4 \\ -\bottomrule -\end{tabular} -""" - + 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 = pd.DataFrame({"a": [0, 0, 1, 1], "b": list("abab"), "c": [1, 2, 3, 4]}) result = df.groupby("a").describe().to_latex() - expected = r"""\begin{tabular}{lrrrrrrrr} -\toprule -{} & \multicolumn{8}{l}{c} \\ -{} & count & mean & std & min & 25\% & 50\% & 75\% & max \\ -a & & & & & & & & \\ -\midrule -0 & 2.0 & 1.5 & 0.707107 & 1.0 & 1.25 & 1.5 & 1.75 & 2.0 \\ -1 & 2.0 & 3.5 & 0.707107 & 3.0 & 3.25 & 3.5 & 3.75 & 4.0 \\ -\bottomrule -\end{tabular} -""" - + expected = _dedent( + r""" + \begin{tabular}{lrrrrrrrr} + \toprule + {} & \multicolumn{8}{l}{c} \\ + {} & count & mean & std & min & 25\% & 50\% & 75\% & max \\ + a & & & & & & & & \\ + \midrule + 0 & 2.0 & 1.5 & 0.707107 & 1.0 & 1.25 & 1.5 & 1.75 & 2.0 \\ + 1 & 2.0 & 3.5 & 0.707107 & 3.0 & 3.25 & 3.5 & 3.75 & 4.0 \\ + \bottomrule + \end{tabular} + """ + ) assert result == expected def test_to_latex_multiindex_dupe_level(self): @@ -269,568 +368,635 @@ def test_to_latex_multiindex_dupe_level(self): index=pd.MultiIndex.from_tuples([("A", "c"), ("B", "c")]), columns=["col"] ) result = df.to_latex() - expected = r"""\begin{tabular}{lll} -\toprule - & & col \\ -\midrule -A & c & NaN \\ -B & c & NaN \\ -\bottomrule -\end{tabular} -""" + 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_multicolumnrow(self): - df = pd.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_multicolumn_default(self, multicolumn_frame): + result = multicolumn_frame.to_latex() + expected = _dedent( + r""" + \begin{tabular}{lrrrrr} + \toprule + {} & \multicolumn{2}{l}{c1} & \multicolumn{2}{l}{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} + """ ) - result = df.to_latex() - expected = r"""\begin{tabular}{lrrrrr} -\toprule -{} & \multicolumn{2}{l}{c1} & \multicolumn{2}{l}{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 - result = df.to_latex(multicolumn=False) - expected = 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} -""" + def test_to_latex_multicolumn_false(self, multicolumn_frame): + result = multicolumn_frame.to_latex(multicolumn=False) + 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 - result = df.T.to_latex(multirow=True) - expected = r"""\begin{tabular}{llrrrrr} -\toprule - & & 0 & 1 & 2 & 3 & 4 \\ -\midrule -\multirow{2}{*}{c1} & 0 & 0 & 1 & 2 & 3 & 4 \\ - & 1 & 5 & 6 & 7 & 8 & 9 \\ -\cline{1-7} -\multirow{2}{*}{c2} & 0 & 0 & 1 & 2 & 3 & 4 \\ - & 1 & 5 & 6 & 7 & 8 & 9 \\ -\cline{1-7} -c3 & 0 & 0 & 1 & 2 & 3 & 4 \\ -\bottomrule -\end{tabular} -""" + 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{2}{*}{c1} & 0 & 0 & 1 & 2 & 3 & 4 \\ + & 1 & 5 & 6 & 7 & 8 & 9 \\ + \cline{1-7} + \multirow{2}{*}{c2} & 0 & 0 & 1 & 2 & 3 & 4 \\ + & 1 & 5 & 6 & 7 & 8 & 9 \\ + \cline{1-7} + c3 & 0 & 0 & 1 & 2 & 3 & 4 \\ + \bottomrule + \end{tabular} + """ + ) assert result == expected - df.index = df.T.index - result = df.T.to_latex(multirow=True, multicolumn=True, multicolumn_format="c") - expected = r"""\begin{tabular}{llrrrrr} -\toprule - & & \multicolumn{2}{c}{c1} & \multicolumn{2}{c}{c2} & c3 \\ - & & 0 & 1 & 0 & 1 & 0 \\ -\midrule -\multirow{2}{*}{c1} & 0 & 0 & 1 & 2 & 3 & 4 \\ - & 1 & 5 & 6 & 7 & 8 & 9 \\ -\cline{1-7} -\multirow{2}{*}{c2} & 0 & 0 & 1 & 2 & 3 & 4 \\ - & 1 & 5 & 6 & 7 & 8 & 9 \\ -\cline{1-7} -c3 & 0 & 0 & 1 & 2 & 3 & 4 \\ -\bottomrule -\end{tabular} -""" + 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{2}{*}{c1} & 0 & 0 & 1 & 2 & 3 & 4 \\ + & 1 & 5 & 6 & 7 & 8 & 9 \\ + \cline{1-7} + \multirow{2}{*}{c2} & 0 & 0 & 1 & 2 & 3 & 4 \\ + & 1 & 5 & 6 & 7 & 8 & 9 \\ + \cline{1-7} + c3 & 0 & 0 & 1 & 2 & 3 & 4 \\ + \bottomrule + \end{tabular} + """ + ) assert result == expected - def test_to_latex_escape(self): - a = "a" - b = "b" - - test_dict = {"co$e^x$": {a: "a", b: "b"}, "co^l1": {a: "a", b: "b"}} - - unescaped_result = DataFrame(test_dict).to_latex(escape=False) - escaped_result = DataFrame(test_dict).to_latex() # default: escape=True - - unescaped_expected = r"""\begin{tabular}{lll} -\toprule -{} & co$e^x$ & co^l1 \\ -\midrule -a & a & a \\ -b & b & b \\ -\bottomrule -\end{tabular} -""" - - escaped_expected = r"""\begin{tabular}{lll} -\toprule -{} & co\$e\textasciicircum x\$ & co\textasciicircum l1 \\ -\midrule -a & a & a \\ -b & b & b \\ -\bottomrule -\end{tabular} -""" + 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 - assert unescaped_result == unescaped_expected - assert escaped_result == escaped_expected + def test_to_latex_escape_default(self, df_with_symbols): + result = df_with_symbols.to_latex() # default: escape=True + expected = _dedent( + r""" + \begin{tabular}{lll} + \toprule + {} & co\$e\textasciicircum x\$ & co\textasciicircum l1 \\ + \midrule + a & a & a \\ + b & b & b \\ + \bottomrule + \end{tabular} + """ + ) + assert result == expected 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() + 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 - escaped_result = df.to_latex() - escaped_expected = 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 escaped_result == escaped_expected - - def test_to_latex_longtable(self): - + def test_to_latex_longtable_with_index(self): df = DataFrame({"a": [1, 2], "b": ["b1", "b2"]}) - withindex_result = df.to_latex(longtable=True) - withindex_expected = 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 withindex_result == withindex_expected - - withoutindex_result = df.to_latex(index=False, longtable=True) - withoutindex_expected = 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 withoutindex_result == withoutindex_expected - - df = DataFrame({"a": [1, 2]}) - with1column_result = df.to_latex(index=False, longtable=True) - assert r"\multicolumn{1}" in with1column_result - - df = DataFrame({"a": [1, 2], "b": [3, 4], "c": [5, 6]}) - with3columns_result = df.to_latex(index=False, longtable=True) - assert r"\multicolumn{3}" in with3columns_result - - def test_to_latex_caption_label(self): - # GH 25436 - the_caption = "a table in a \\texttt{table/tabular} environment" - the_label = "tab:table_tabular" + 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 - # test when only the caption is provided - result_c = df.to_latex(caption=the_caption) - - expected_c = r"""\begin{table} -\centering -\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_c == expected_c - - # test when only the label is provided - result_l = df.to_latex(label=the_label) - - expected_l = r"""\begin{table} -\centering -\label{tab:table_tabular} -\begin{tabular}{lrl} -\toprule -{} & a & b \\ -\midrule -0 & 1 & b1 \\ -1 & 2 & b2 \\ -\bottomrule -\end{tabular} -\end{table} -""" - assert result_l == expected_l - - # test when the caption and the label are provided - result_cl = df.to_latex(caption=the_caption, label=the_label) + @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 fr"\multicolumn{{{expected_number}}}" in result - expected_cl = r"""\begin{table} -\centering -\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_cl == expected_cl + 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} + \centering + \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_longtable_caption_label(self): + def test_to_latex_label_only(self, df_short, label_table): # GH 25436 - the_caption = "a table in a \\texttt{longtable} environment" - the_label = "tab:longtable" + result = df_short.to_latex(label=label_table) + expected = _dedent( + r""" + \begin{table} + \centering + \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 - df = DataFrame({"a": [1, 2], "b": ["b1", "b2"]}) + 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} + \centering + \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_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 - # test when only the caption is provided - result_c = df.to_latex(longtable=True, caption=the_caption) - - expected_c = 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_c == expected_c - - # test when only the label is provided - result_l = df.to_latex(longtable=True, label=the_label) - - expected_l = 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_l == expected_l - - # test when the caption and the label are provided - result_cl = df.to_latex(longtable=True, caption=the_caption, label=the_label) - - expected_cl = 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 + 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 -\bottomrule -\endlastfoot -0 & 1 & b1 \\ -1 & 2 & b2 \\ -\end{longtable} -""" - assert result_cl == expected_cl + 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_position(self): the_position = "h" - df = DataFrame({"a": [1, 2], "b": ["b1", "b2"]}) - - # test when only the position is provided - result_p = df.to_latex(position=the_position) - - expected_p = r"""\begin{table}[h] -\centering -\begin{tabular}{lrl} -\toprule -{} & a & b \\ -\midrule -0 & 1 & b1 \\ -1 & 2 & b2 \\ -\bottomrule -\end{tabular} -\end{table} -""" - assert result_p == expected_p + result = df.to_latex(position=the_position) + expected = _dedent( + r""" + \begin{table}[h] + \centering + \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"]}) - - # test when only the position is provided - result_p = df.to_latex(longtable=True, position=the_position) - - expected_p = 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_p == expected_p + 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 def test_to_latex_escape_special_chars(self): special_characters = ["&", "%", "$", "#", "_", "{", "}", "~", "^", "\\"] df = DataFrame(data=special_characters) - observed = df.to_latex() - expected = r"""\begin{tabular}{ll} -\toprule -{} & 0 \\ -\midrule -0 & \& \\ -1 & \% \\ -2 & \$ \\ -3 & \# \\ -4 & \_ \\ -5 & \{ \\ -6 & \} \\ -7 & \textasciitilde \\ -8 & \textasciicircum \\ -9 & \textbackslash \\ -\bottomrule -\end{tabular} -""" - - assert observed == expected + result = df.to_latex() + 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_no_header(self): + def test_to_latex_no_header_with_index(self): # GH 7124 df = DataFrame({"a": [1, 2], "b": ["b1", "b2"]}) - withindex_result = df.to_latex(header=False) - withindex_expected = r"""\begin{tabular}{lrl} -\toprule -0 & 1 & b1 \\ -1 & 2 & b2 \\ -\bottomrule -\end{tabular} -""" - - assert withindex_result == withindex_expected - - withoutindex_result = df.to_latex(index=False, header=False) - withoutindex_expected = r"""\begin{tabular}{rl} -\toprule -1 & b1 \\ -2 & b2 \\ -\bottomrule -\end{tabular} -""" - - assert withoutindex_result == withoutindex_expected + result = df.to_latex(header=False) + expected = _dedent( + r""" + \begin{tabular}{lrl} + \toprule + 0 & 1 & b1 \\ + 1 & 2 & b2 \\ + \bottomrule + \end{tabular} + """ + ) + assert result == expected - def test_to_latex_specified_header(self): + def test_to_latex_no_header_without_index(self): # GH 7124 df = DataFrame({"a": [1, 2], "b": ["b1", "b2"]}) - withindex_result = df.to_latex(header=["AA", "BB"]) - withindex_expected = r"""\begin{tabular}{lrl} -\toprule -{} & AA & BB \\ -\midrule -0 & 1 & b1 \\ -1 & 2 & b2 \\ -\bottomrule -\end{tabular} -""" - - assert withindex_result == withindex_expected - - withoutindex_result = df.to_latex(header=["AA", "BB"], index=False) - withoutindex_expected = r"""\begin{tabular}{rl} -\toprule -AA & BB \\ -\midrule - 1 & b1 \\ - 2 & b2 \\ -\bottomrule -\end{tabular} -""" + result = df.to_latex(index=False, header=False) + expected = _dedent( + r""" + \begin{tabular}{rl} + \toprule + 1 & b1 \\ + 2 & b2 \\ + \bottomrule + \end{tabular} + """ + ) + assert result == expected - assert withoutindex_result == withoutindex_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 - withoutescape_result = df.to_latex(header=["$A$", "$B$"], escape=False) - withoutescape_expected = r"""\begin{tabular}{lrl} -\toprule -{} & $A$ & $B$ \\ -\midrule -0 & 1 & b1 \\ -1 & 2 & b2 \\ -\bottomrule -\end{tabular} -""" + 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 - assert withoutescape_result == withoutescape_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 + def test_to_latex_number_of_items_in_header_missmatch_raises(self): + # GH 7124 + df = DataFrame({"a": [1, 2], "b": ["b1", "b2"]}) msg = "Writing 2 cols but got 1 aliases" with pytest.raises(ValueError, match=msg): df.to_latex(header=["A"]) - def test_to_latex_decimal(self, float_frame): + def test_to_latex_decimal(self): # GH 12031 - float_frame.to_latex() - df = DataFrame({"a": [1.0, 2.1], "b": ["b1", "b2"]}) - withindex_result = df.to_latex(decimal=",") - - withindex_expected = r"""\begin{tabular}{lrl} -\toprule -{} & a & b \\ -\midrule -0 & 1,0 & b1 \\ -1 & 2,1 & b2 \\ -\bottomrule -\end{tabular} -""" - - assert withindex_result == withindex_expected + result = df.to_latex(decimal=",") + expected = _dedent( + r""" + \begin{tabular}{lrl} + \toprule + {} & a & b \\ + \midrule + 0 & 1,0 & b1 \\ + 1 & 2,1 & b2 \\ + \bottomrule + \end{tabular} + """ + ) + assert result == expected def test_to_latex_series(self): s = Series(["a", "b", "c"]) - withindex_result = s.to_latex() - withindex_expected = r"""\begin{tabular}{ll} -\toprule -{} & 0 \\ -\midrule -0 & a \\ -1 & b \\ -2 & c \\ -\bottomrule -\end{tabular} -""" - assert withindex_result == withindex_expected + 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_bold_rows(self): # GH 16707 df = pd.DataFrame({"a": [1, 2], "b": ["b1", "b2"]}) - observed = df.to_latex(bold_rows=True) - expected = r"""\begin{tabular}{lrl} -\toprule -{} & a & b \\ -\midrule -\textbf{0} & 1 & b1 \\ -\textbf{1} & 2 & b2 \\ -\bottomrule -\end{tabular} -""" - assert observed == expected + 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 = pd.DataFrame({"a": [1, 2], "b": ["b1", "b2"]}) - observed = df.to_latex(bold_rows=False) - expected = r"""\begin{tabular}{lrl} -\toprule -{} & a & b \\ -\midrule -0 & 1 & b1 \\ -1 & 2 & b2 \\ -\bottomrule -\end{tabular} -""" - assert observed == expected + 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 @pytest.mark.parametrize("name0", [None, "named0"]) @pytest.mark.parametrize("name1", [None, "named1"]) @@ -875,13 +1041,16 @@ def test_to_latex_multiindex_nans(self, one_row): if one_row: df = df.iloc[[0]] observed = df.set_index(["a", "b"]).to_latex() - expected = r"""\begin{tabular}{llr} -\toprule - & & c \\ -a & b & \\ -\midrule -NaN & 2 & 4 \\ -""" + expected = _dedent( + r""" + \begin{tabular}{llr} + \toprule + & & c \\ + a & b & \\ + \midrule + NaN & 2 & 4 \\ + """ + ) if not one_row: expected += r"""1.0 & 3 & 5 \\ """ @@ -893,93 +1062,111 @@ def test_to_latex_multiindex_nans(self, one_row): def test_to_latex_non_string_index(self): # GH 19981 observed = pd.DataFrame([[1, 2, 3]] * 2).set_index([0, 1]).to_latex() - expected = r"""\begin{tabular}{llr} -\toprule - & & 2 \\ -0 & 1 & \\ -\midrule -1 & 2 & 3 \\ - & 2 & 3 \\ -\bottomrule -\end{tabular} -""" + expected = _dedent( + r""" + \begin{tabular}{llr} + \toprule + & & 2 \\ + 0 & 1 & \\ + \midrule + 1 & 2 & 3 \\ + & 2 & 3 \\ + \bottomrule + \end{tabular} + """ + ) assert observed == expected def test_to_latex_midrule_location(self): # GH 18326 df = pd.DataFrame({"a": [1, 2]}) df.index.name = "foo" - observed = df.to_latex(index_names=False) - expected = r"""\begin{tabular}{lr} -\toprule -{} & a \\ -\midrule -0 & 1 \\ -1 & 2 \\ -\bottomrule -\end{tabular} -""" - - assert observed == expected + 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 def test_to_latex_multiindex_empty_name(self): # GH 18669 mi = pd.MultiIndex.from_product([[1, 2]], names=[""]) df = pd.DataFrame(-1, index=mi, columns=range(4)) observed = df.to_latex() - expected = r"""\begin{tabular}{lrrrr} -\toprule - & 0 & 1 & 2 & 3 \\ -{} & & & & \\ -\midrule -1 & -1 & -1 & -1 & -1 \\ -2 & -1 & -1 & -1 & -1 \\ -\bottomrule -\end{tabular} -""" + 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_float_format_no_fixed_width(self): - + def test_to_latex_float_format_no_fixed_width_3decimals(self): # GH 21625 df = DataFrame({"x": [0.19999]}) - expected = r"""\begin{tabular}{lr} -\toprule -{} & x \\ -\midrule -0 & 0.200 \\ -\bottomrule -\end{tabular} -""" - assert df.to_latex(float_format="%.3f") == expected + 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]}) - expected = r"""\begin{tabular}{lr} -\toprule -{} & x \\ -\midrule -0 & 100 \\ -\bottomrule -\end{tabular} -""" - assert df.to_latex(float_format="%.0f") == expected + result = df.to_latex(float_format="%.0f") + expected = _dedent( + r""" + \begin{tabular}{lr} + \toprule + {} & x \\ + \midrule + 0 & 100 \\ + \bottomrule + \end{tabular} + """ + ) + assert result == expected def test_to_latex_multindex_header(self): # GH 16718 - df = pd.DataFrame({"a": [0], "b": [1], "c": [2], "d": [3]}).set_index( - ["a", "b"] - ) + df = pd.DataFrame({"a": [0], "b": [1], "c": [2], "d": [3]}) + df = df.set_index(["a", "b"]) observed = df.to_latex(header=["r1", "r2"]) - expected = r"""\begin{tabular}{llrr} -\toprule - & & r1 & r2 \\ -a & b & & \\ -\midrule -0 & 1 & 2 & 3 \\ -\bottomrule -\end{tabular} -""" + expected = _dedent( + r""" + \begin{tabular}{llrr} + \toprule + & & r1 & r2 \\ + a & b & & \\ + \midrule + 0 & 1 & 2 & 3 \\ + \bottomrule + \end{tabular} + """ + ) assert observed == expected