TST: Add test to ensure DF describe does not throw an error (#32409)

.github/CODE_OF_CONDUCT.md

@@ -60,4 +60,3 @@ and the [Swift Code of Conduct][swift].
 [homepage]: https://www.contributor-covenant.org
 [version]: https://www.contributor-covenant.org/version/1/3/0/
 [swift]: https://swift.org/community/#code-of-conduct
-

.github/workflows/autoupdate-pre-commit-config.yml

@@ -0,0 +1,33 @@
+name: "Update pre-commit config"
+
+on:
+  schedule:
+    - cron: "0 7 * * 1" # At 07:00 on each Monday.
+  workflow_dispatch:
+
+jobs:
+  update-pre-commit:
+    if: github.repository_owner == 'pandas-dev'
+    name: Autoupdate pre-commit config
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Python
+        uses: actions/setup-python@v2
+      - name: Cache multiple paths
+        uses: actions/cache@v2
+        with:
+          path: |
+            ~/.cache/pre-commit
+            ~/.cache/pip
+          key: pre-commit-autoupdate-${{ runner.os }}-build
+      - name: Update pre-commit config packages
+        uses: technote-space/create-pr-action@v2
+        with:
+          GITHUB_TOKEN: ${{ secrets.ACTION_TRIGGER_TOKEN }}
+          EXECUTE_COMMANDS: |
+            pip install pre-commit
+            pre-commit autoupdate || (exit 0);
+            pre-commit run -a || (exit 0);
+          COMMIT_MESSAGE: "⬆️ UPGRADE: Autoupdate pre-commit config"
+          PR_BRANCH_NAME: "pre-commit-config-update-${PR_ID}"
+          PR_TITLE: "⬆️ UPGRADE: Autoupdate pre-commit config"

.github/workflows/ci.yml

@@ -4,7 +4,9 @@ on:
   push:
     branches: master
   pull_request:
-    branches: master
+    branches:
+      - master
+      - 1.2.x
 
 env:
   ENV_FILE: environment.yml
@@ -16,7 +18,7 @@ jobs:
     steps:
 
     - name: Setting conda path
-      run: echo "::add-path::${HOME}/miniconda3/bin"
+      run: echo "${HOME}/miniconda3/bin" >> $GITHUB_PATH
 
     - name: Checkout
       uses: actions/checkout@v1
@@ -35,12 +37,6 @@ jobs:
         ci/code_checks.sh lint
       if: always()
 
-    - name: Dependencies consistency
-      run: |
-        source activate pandas-dev
-        ci/code_checks.sh dependencies
-      if: always()
-
     - name: Checks on imported code
       run: |
         source activate pandas-dev
@@ -102,7 +98,7 @@ jobs:
     steps:
 
     - name: Setting conda path
-      run: echo "::set-env name=PATH::${HOME}/miniconda3/bin:${PATH}"
+      run: echo "${HOME}/miniconda3/bin" >> $GITHUB_PATH
 
     - name: Checkout
       uses: actions/checkout@v1
@@ -123,7 +119,7 @@ jobs:
     # This can be removed when the ipython directive fails when there are errors,
     # including the `tee sphinx.log` in te previous step (https://github.com/ipython/ipython/issues/11547)
     - name: Check ipython directive errors
-      run: "! grep -B1 \"^<<<-------------------------------------------------------------------------$\" sphinx.log"
+      run: "! grep -B10 \"^<<<-------------------------------------------------------------------------$\" sphinx.log"
 
     - name: Install ssh key
       run: |

.github/workflows/pre-commit.yml

@@ -0,0 +1,14 @@
+name: pre-commit
+
+on:
+  pull_request:
+  push:
+    branches: [master]
+
+jobs:
+  pre-commit:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-python@v2
+    - uses: pre-commit/action@v2.0.0

.github/workflows/stale-pr.yml

@@ -0,0 +1,21 @@
+name: "Stale PRs"
+on:
+  schedule:
+  # * is a special character in YAML so you have to quote this string
+  - cron: "0 0 * * *"
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/stale@v3
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        stale-pr-message: "This pull request is stale because it has been open for thirty days with no activity. Please update or respond to this comment if you're still interested in working on this."
+        skip-stale-pr-message: false
+        stale-pr-label: "Stale"
+        exempt-pr-labels: "Needs Review,Blocked,Needs Discussion"
+        days-before-stale: 30
+        days-before-close: -1
+        remove-stale-when-updated: false
+        debug-only: false

.gitignore

@@ -12,6 +12,7 @@
 *.log
 *.swp
 *.pdb
+*.zip
 .project
 .pydevproject
 .settings

.pre-commit-config.yaml

@@ -1,44 +1,168 @@
 repos:
 -   repo: https://github.com/python/black
-    rev: 19.10b0
+    rev: 20.8b1
     hooks:
     -   id: black
-        language_version: python3
 -   repo: https://gitlab.com/pycqa/flake8
-    rev: 3.7.7
+    rev: 3.8.4
     hooks:
     -   id: flake8
-        language: python_venv
         additional_dependencies: [flake8-comprehensions>=3.1.0]
     -   id: flake8
-        name: flake8-pyx
-        language: python_venv
-        files: \.(pyx|pxd)$
-        types:
-          - file
+        name: flake8 (cython)
+        types: [cython]
         args: [--append-config=flake8/cython.cfg]
     -   id: flake8
-        name: flake8-pxd
-        language: python_venv
+        name: flake8 (cython template)
         files: \.pxi\.in$
-        types:
-          - file
+        types: [text]
         args: [--append-config=flake8/cython-template.cfg]
--   repo: https://github.com/pre-commit/mirrors-isort
-    rev: v4.3.21
+-   repo: https://github.com/PyCQA/isort
+    rev: 5.6.4
     hooks:
     -   id: isort
-        language: python_venv
-        exclude: ^pandas/__init__\.py$|^pandas/core/api\.py$
--   repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v0.730
-    hooks:
-     -  id: mypy
-        args:
-          # As long as a some files are excluded from check-untyped-defs
-          # we have to exclude it from the pre-commit hook as the configuration
-          # is based on modules but the hook runs on files.
-          - --no-check-untyped-defs
-          - --follow-imports
-          - skip
-        files: pandas/
+        name: isort (python)
+    -   id: isort
+        name: isort (cython)
+        types: [cython]
+-   repo: https://github.com/asottile/pyupgrade
+    rev: v2.7.4
+    hooks:
+    -   id: pyupgrade
+        args: [--py37-plus]
+-   repo: https://github.com/pre-commit/pygrep-hooks
+    rev: v1.7.0
+    hooks:
+      - id: rst-backticks
+      - id: rst-directive-colons
+        types: [text]
+      - id: rst-inline-touching-normal
+        types: [text]
+-   repo: local
+    hooks:
+    -   id: pip_to_conda
+        name: Generate pip dependency from conda
+        description: This hook checks if the conda environment.yml and requirements-dev.txt are equal
+        language: python
+        entry: python scripts/generate_pip_deps_from_conda.py
+        files: ^(environment.yml|requirements-dev.txt)$
+        pass_filenames: false
+        additional_dependencies: [pyyaml]
+    -   id: flake8-rst
+        name: flake8-rst
+        description: Run flake8 on code snippets in docstrings or RST files
+        language: python
+        entry: flake8-rst
+        types: [rst]
+        args: [--filename=*.rst]
+        additional_dependencies: [flake8-rst==0.7.0, flake8==3.7.9]
+    -   id: non-standard-imports
+        name: Check for non-standard imports
+        language: pygrep
+        entry: |
+            (?x)
+            # Check for imports from pandas.core.common instead of `import pandas.core.common as com`
+            from\ pandas\.core\.common\ import|
+            from\ pandas\.core\ import\ common|
+
+            # Check for imports from collections.abc instead of `from collections import abc`
+            from\ collections\.abc\ import
+
+    -   id: non-standard-numpy.random-related-imports
+        name: Check for non-standard numpy.random-related imports excluding pandas/_testing.py
+        language: pygrep
+        exclude: pandas/_testing.py
+        entry: |
+            (?x)
+            # Check for imports from np.random.<method> instead of `from numpy import random` or `from numpy.random import <method>`
+            from\ numpy\ import\ random|
+            from\ numpy.random\ import
+        types: [python]
+    -   id: non-standard-imports-in-tests
+        name: Check for non-standard imports in test suite
+        language: pygrep
+        entry: |
+            (?x)
+            # Check for imports from pandas._testing instead of `import pandas._testing as tm`
+            from\ pandas\._testing\ import|
+            from\ pandas\ import\ _testing\ as\ tm|
+
+            # No direct imports from conftest
+            conftest\ import|
+            import\ conftest
+        types: [python]
+        files: ^pandas/tests/
+    -   id: incorrect-code-directives
+        name: Check for incorrect code block or IPython directives
+        language: pygrep
+        entry: (\.\. code-block ::|\.\. ipython ::)
+        files: \.(py|pyx|rst)$
+    -   id: unwanted-patterns-strings-to-concatenate
+        name: Check for use of not concatenated strings
+        language: python
+        entry: python scripts/validate_unwanted_patterns.py --validation-type="strings_to_concatenate"
+        files: \.(py|pyx|pxd|pxi)$
+    -   id: unwanted-patterns-strings-with-wrong-placed-whitespace
+        name: Check for strings with wrong placed spaces
+        language: python
+        entry: python scripts/validate_unwanted_patterns.py --validation-type="strings_with_wrong_placed_whitespace"
+        files: \.(py|pyx|pxd|pxi)$
+    -   id: unwanted-patterns-private-import-across-module
+        name: Check for import of private attributes across modules
+        language: python
+        entry: python scripts/validate_unwanted_patterns.py --validation-type="private_import_across_module"
+        types: [python]
+        exclude: ^(asv_bench|pandas/tests|doc)/
+    -   id: unwanted-patterns-private-function-across-module
+        name: Check for use of private functions across modules
+        language: python
+        entry: python scripts/validate_unwanted_patterns.py --validation-type="private_function_across_module"
+        types: [python]
+        exclude: ^(asv_bench|pandas/tests|doc)/
+    -   id: inconsistent-namespace-usage
+        name: 'Check for inconsistent use of pandas namespace in tests'
+        entry: python scripts/check_for_inconsistent_pandas_namespace.py
+        language: python
+        types: [python]
+        files: ^pandas/tests/
+    -   id: FrameOrSeriesUnion
+        name: Check for use of Union[Series, DataFrame] instead of FrameOrSeriesUnion alias
+        entry: Union\[.*(Series.*DataFrame|DataFrame.*Series).*\]
+        language: pygrep
+        types: [python]
+        exclude: ^pandas/_typing\.py$
+    -   id: type-not-class
+        name: Check for use of foo.__class__ instead of type(foo)
+        entry: \.__class__
+        language: pygrep
+        files: \.(py|pyx)$
+    -   id: unwanted-typing
+        name: Check for use of comment-based annotation syntax and missing error codes
+        entry: |
+            (?x)
+            \#\ type:\ (?!ignore)|
+            \#\ type:\s?ignore(?!\[)
+        language: pygrep
+        types: [python]
+    -   id: no-os-remove
+        name: Check code for instances of os.remove
+        entry: os\.remove
+        language: pygrep
+        types: [python]
+        files: ^pandas/tests/
+        exclude: |
+            (?x)^
+            pandas/tests/io/excel/test_writers\.py|
+            pandas/tests/io/pytables/common\.py|
+            pandas/tests/io/pytables/test_store\.py$
+-   repo: https://github.com/asottile/yesqa
+    rev: v1.2.2
+    hooks:
+    -   id: yesqa
+-   repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v3.3.0
+    hooks:
+    -   id: end-of-file-fixer
+        exclude: ^LICENSES/|\.(html|csv|txt|svg|py)$
+    -   id: trailing-whitespace
+        exclude: \.(html|svg)$