CI: add jinja2 as a hard dependency for DataFrame.to_latex/to_html

ci/deps/actions-38-db-min.yaml

@@ -15,6 +15,7 @@ dependencies:
   - numpy<1.20  # GH#39541 compat for pyarrow<3
   - python-dateutil
   - pytz
+  - jinja2
 
   # optional
   - beautifulsoup4

ci/deps/actions-38-db.yaml

@@ -20,6 +20,7 @@ dependencies:
   - gcsfs>=0.6.0
   - geopandas
   - html5lib
+  - jinja2
   - matplotlib
   - moto>=1.3.14
   - flask

ci/deps/actions-38-locale_slow.yaml

@@ -28,3 +28,4 @@ dependencies:
   - xlsxwriter=1.2.2
   - xlwt=1.3.0
   - html5lib=1.1
+  - jinja2

ci/deps/actions-38-slow.yaml

@@ -36,3 +36,4 @@ dependencies:
   - moto
   - flask
   - numba
+  - jinja2

ci/deps/actions-38.yaml

@@ -18,3 +18,4 @@ dependencies:
   - nomkl
   - pytz
   - tabulate==0.8.7
+  - jinja2

ci/deps/actions-39-numpydev.yaml

@@ -13,6 +13,7 @@ dependencies:
   # pandas dependencies
   - python-dateutil
   - pytz
+  - jinja2
   - pip
   - pip:
     - cython==0.29.21 # GH#34014

doc/source/getting_started/install.rst

@@ -227,6 +227,7 @@ Package                                                          Minimum support
 `NumPy <https://numpy.org>`__                                    1.18.5
 `python-dateutil <https://dateutil.readthedocs.io/en/stable/>`__ 2.8.1
 `pytz <https://pypi.org/project/pytz/>`__                        2020.1
+`Jinja2 <https://jinja.pocoo.org>`__                             2.11
 ================================================================ ==========================
 
 .. _install.recommended_dependencies:
@@ -266,7 +267,6 @@ Visualization
 Dependency                Minimum Version    Notes
 ========================= ================== =============================================================
 matplotlib                3.3.2              Plotting library
-Jinja2                    2.11               Conditional formatting with DataFrame.style
 tabulate                  0.8.7              Printing in Markdown-friendly format (see `tabulate`_)
 ========================= ================== =============================================================
 

doc/source/whatsnew/v1.4.0.rst

@@ -218,6 +218,10 @@ Optional libraries below the lowest tested version may still work, but are not c
 
 See :ref:`install.dependencies` and :ref:`install.optional_dependencies` for more.
 
+Also note that ``Jinja2``, with minimum version 2.11, has been made a hard dependency to support
+DataFrame rendering in LaTeX and HTML formats, where the methods :meth:`DataFrame.to_latex` and
+:meth:`DataFrame.to_html` now utilise the :class:`.Styler` template parsing mechanics.
+
 .. _whatsnew_140.api_breaking.other:
 
 Other API changes

environment.yml

@@ -7,6 +7,7 @@ dependencies:
   - python=3.8
   - python-dateutil>=2.8.1
   - pytz
+  - jinja2  # pandas.Styler (DataFrame.to_html / to_latex)
 
   # benchmarks
   - asv
@@ -79,7 +80,6 @@ dependencies:
   - bottleneck>=1.3.1
   - ipykernel
   - ipython>=7.11.1
-  - jinja2  # pandas.Styler
   - matplotlib>=3.3.2  # pandas.plotting, Series.plot, DataFrame.plot
   - numexpr>=2.7.1
   - scipy>=1.4.1

pandas/io/formats/style.py

@@ -2194,9 +2194,7 @@ def hide_index(
             subset = non_reducing_slice(subset_)
             hide = self.data.loc[subset]
             hrows = self.index.get_indexer_for(hide.index)
-            # error: Incompatible types in assignment (expression has type
-            # "ndarray", variable has type "Sequence[int]")
-            self.hidden_rows = hrows  # type: ignore[assignment]
+            self.hidden_rows = list(hrows)
 
         if names:
             self.hide_index_names = True
@@ -2333,9 +2331,7 @@ def hide_columns(
             subset = non_reducing_slice(subset_)
             hide = self.data.loc[subset]
             hcols = self.columns.get_indexer_for(hide.columns)
-            # error: Incompatible types in assignment (expression has type
-            # "ndarray", variable has type "Sequence[int]")
-            self.hidden_columns = hcols  # type: ignore[assignment]
+            self.hidden_columns = list(hcols)
 
         if names:
             self.hide_column_names = True

requirements-dev.txt

@@ -4,6 +4,7 @@
 numpy>=1.18.5
 python-dateutil>=2.8.1
 pytz
+jinja2
 asv
 cython>=0.29.21
 black==21.5b2
@@ -51,7 +52,6 @@ blosc
 bottleneck>=1.3.1
 ipykernel
 ipython>=7.11.1
-jinja2
 matplotlib>=3.3.2
 numexpr>=2.7.1
 scipy>=1.4.1

setup.cfg

@@ -33,6 +33,7 @@ install_requires =
     numpy>=1.18.5
     python-dateutil>=2.8.1
     pytz>=2020.1
+    jinja2>=2.11
 python_requires = >=3.8
 include_package_data = True
 zip_safe = False