Merge branch 'master' into dev23122

Author: bdrum

.github/ISSUE_TEMPLATE/bug_report.yaml

@@ -7,6 +7,7 @@ body:
   - type: checkboxes
     id: checks
     attributes:
+      label: Pandas version checks
       options:
         - label: >
             I have checked that this issue has not already been reported.

.github/ISSUE_TEMPLATE/documentation_improvement.yaml

@@ -6,6 +6,7 @@ labels: [Docs, Needs Triage]
 body:
   - type: checkboxes
     attributes:
+      label: Pandas version checks
       options:
         - label: >
             I have checked that the issue still exists on the latest versions of the docs

.github/ISSUE_TEMPLATE/installation_issue.yaml

@@ -7,6 +7,7 @@ body:
   - type: checkboxes
     id: checks
     attributes:
+      label: Installation check
       options:
         - label: >
             I have read the [installation guide](https://pandas.pydata.org/pandas-docs/stable/getting_started/install.html#installing-pandas).

.github/ISSUE_TEMPLATE/performance_issue.yaml

@@ -7,6 +7,7 @@ body:
   - type: checkboxes
     id: checks
     attributes:
+      label: Pandas version checks
       options:
         - label: >
             I have checked that this issue has not already been reported.

.github/ISSUE_TEMPLATE/submit_question.yml

@@ -11,6 +11,7 @@ body:
         usage questions, we ask that all usage questions are first asked on StackOverflow.
   - type: checkboxes
     attributes:
+      label: Research
       options:
         - label: >
             I have searched the [[pandas] tag](https://stackoverflow.com/questions/tagged/pandas)

.github/workflows/ci.yml

@@ -78,6 +78,40 @@ jobs:
       run: pytest scripts
       if: always()
 
+  benchmarks:
+    name: Benchmarks
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash -l {0}
+
+    concurrency:
+      # https://github.bokerqi.topmunity/t/concurrecy-not-work-for-push/183068/7
+      group: ${{ github.event_name == 'push' && github.run_number || github.ref }}-benchmarks
+      cancel-in-progress: true
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+
+    - name: Cache conda
+      uses: actions/cache@v2
+      with:
+        path: ~/conda_pkgs_dir
+        key: ${{ runner.os }}-conda-${{ hashFiles('${{ env.ENV_FILE }}') }}
+
+    - uses: conda-incubator/setup-miniconda@v2
+      with:
+        activate-environment: pandas-dev
+        channel-priority: strict
+        environment-file: ${{ env.ENV_FILE }}
+        use-only-tar-bz2: true
+
+    - name: Build Pandas
+      uses: ./.github/actions/build_pandas
+
     - name: Running benchmarks
       run: |
         cd asv_bench

.github/workflows/posix.yml

@@ -31,12 +31,12 @@ jobs:
           [actions-38-slow.yaml, "slow", "", "", "", "", ""],
           [actions-38-locale.yaml, "not slow and not network", "language-pack-zh-hans xsel", "zh_CN.utf8", "zh_CN.utf8", "", ""],
           [actions-39-slow.yaml, "slow", "", "", "", "", ""],
+          [actions-pypy-38.yaml, "not slow and not clipboard", "", "", "", "", "--max-worker-restart 0"],
           [actions-39-numpydev.yaml, "not slow and not network", "xsel", "", "", "deprecate", "-W error"],
           [actions-39.yaml, "not slow and not clipboard", "", "", "", "", ""]
         ]
       fail-fast: false
     env:
-      COVERAGE: true
       ENV_FILE: ci/deps/${{ matrix.settings[0] }}
       PATTERN: ${{ matrix.settings[1] }}
       EXTRA_APT: ${{ matrix.settings[2] }}
@@ -45,6 +45,9 @@ jobs:
       PANDAS_TESTING_MODE: ${{ matrix.settings[5] }}
       TEST_ARGS: ${{ matrix.settings[6] }}
       PYTEST_TARGET:  pandas
+      IS_PYPY: ${{ contains(matrix.settings[0], 'pypy') }}
+      # TODO: re-enable coverage on pypy, its slow
+      COVERAGE: ${{ !contains(matrix.settings[0], 'pypy') }}
     concurrency:
       # https://github.bokerqi.topmunity/t/concurrecy-not-work-for-push/183068/7
       group: ${{ github.event_name == 'push' && github.run_number || github.ref }}-${{ matrix.settings[0] }}
@@ -82,12 +85,29 @@ jobs:
         channel-priority: flexible
         environment-file: ${{ env.ENV_FILE }}
         use-only-tar-bz2: true
+      if: ${{ env.IS_PYPY == 'false' }} # No pypy3.8 support
+
+    - name: Setup PyPy
+      uses: actions/setup-python@v2.3.1
+      with:
+        python-version: "pypy-3.8"
+      if: ${{ env.IS_PYPY == 'true' }}
+
+    - name: Setup PyPy dependencies
+      shell: bash
+      run: |
+        # TODO: re-enable cov, its slowing the tests down though
+        # TODO: Unpin Cython, the new Cython 0.29.26 is causing compilation errors
+        pip install Cython==0.29.25 numpy python-dateutil pytz pytest>=6.0 pytest-xdist>=1.31.0 hypothesis>=5.5.3
+      if: ${{ env.IS_PYPY == 'true' }}
 
     - name: Build Pandas
       uses: ./.github/actions/build_pandas
 
     - name: Test
       run: ci/run_tests.sh
+      # TODO: Don't continue on error for PyPy
+      continue-on-error: ${{ env.IS_PYPY == 'true' }}
       if: always()
 
     - name: Build Version

.gitignore

@@ -50,6 +50,8 @@ dist
 *.egg-info
 .eggs
 .pypirc
+# type checkers
+pandas/py.typed
 
 # tox testing tool
 .tox

asv_bench/benchmarks/arithmetic.py

@@ -144,7 +144,7 @@ def setup(self, op, shape):
         # should already be the case, but just to be sure
         df._consolidate_inplace()
 
-        # TODO: GH#33198 the setting here shoudlnt need two steps
+        # TODO: GH#33198 the setting here shouldn't need two steps
         arr1 = np.random.randn(n_rows, max(n_cols // 4, 3)).astype("f8")
         arr2 = np.random.randn(n_rows, n_cols // 2).astype("i8")
         arr3 = np.random.randn(n_rows, n_cols // 4).astype("f8")

asv_bench/benchmarks/io/csv.py

@@ -55,6 +55,26 @@ def time_frame(self, kind):
         self.df.to_csv(self.fname)
 
 
+class ToCSVMultiIndexUnusedLevels(BaseIO):
+
+    fname = "__test__.csv"
+
+    def setup(self):
+        df = DataFrame({"a": np.random.randn(100_000), "b": 1, "c": 1})
+        self.df = df.set_index(["a", "b"])
+        self.df_unused_levels = self.df.iloc[:10_000]
+        self.df_single_index = df.set_index(["a"]).iloc[:10_000]
+
+    def time_full_frame(self):
+        self.df.to_csv(self.fname)
+
+    def time_sliced_frame(self):
+        self.df_unused_levels.to_csv(self.fname)
+
+    def time_single_index_frame(self):
+        self.df_single_index.to_csv(self.fname)
+
+
 class ToCSVDatetime(BaseIO):
 
     fname = "__test__.csv"
@@ -67,6 +87,21 @@ def time_frame_date_formatting(self):
         self.data.to_csv(self.fname, date_format="%Y%m%d")
 
 
+class ToCSVDatetimeIndex(BaseIO):
+
+    fname = "__test__.csv"
+
+    def setup(self):
+        rng = date_range("2000", periods=100_000, freq="S")
+        self.data = DataFrame({"a": 1}, index=rng)
+
+    def time_frame_date_formatting_index(self):
+        self.data.to_csv(self.fname, date_format="%Y-%m-%d %H:%M:%S")
+
+    def time_frame_date_no_format_index(self):
+        self.data.to_csv(self.fname)
+
+
 class ToCSVDatetimeBig(BaseIO):
 
     fname = "__test__.csv"