Backport PR #55488 on branch 2.1.x (BLD: Pin numpy to < 2) (#55500)

Backport PR #55488: BLD: Pin numpy to < 2

Co-authored-by: Thomas Li <47963215+lithomas1@users.noreply.github.com>

.github/actions/build_pandas/action.yml

@@ -25,8 +25,8 @@ runs:
     - name: Build Pandas
       run: |
         if [[ ${{ inputs.editable }} == "true" ]]; then
-          pip install -e . --no-build-isolation -v
+          pip install -e . --no-build-isolation -v --no-deps
         else
-          pip install . --no-build-isolation -v
+          pip install . --no-build-isolation -v --no-deps
         fi
       shell: bash -el {0}

.github/workflows/unit-tests.yml

@@ -348,7 +348,7 @@ jobs:
           python -m pip install --pre --extra-index-url https://pypi.anaconda.org/scientific-python-nightly-wheels/simple numpy
           python -m pip install versioneer[toml]
           python -m pip install python-dateutil pytz tzdata "cython<3.0.3" hypothesis>=6.46.1 pytest>=7.3.2 pytest-xdist>=2.2.0 pytest-cov pytest-asyncio>=0.17
-          python -m pip install -ve . --no-build-isolation --no-index
+          python -m pip install -ve . --no-build-isolation --no-index --no-deps
           python -m pip list
 
       - name: Run Tests

ci/deps/actions-310.yaml

@@ -20,7 +20,7 @@ dependencies:
 
   # required dependencies
   - python-dateutil
-  - numpy
+  - numpy<2
   - pytz
 
   # optional dependencies

ci/deps/actions-311-downstream_compat.yaml

@@ -21,7 +21,7 @@ dependencies:
 
   # required dependencies
   - python-dateutil
-  - numpy
+  - numpy<2
   - pytz
 
   # optional dependencies

ci/deps/actions-311-pyarrownightly.yaml

@@ -19,7 +19,7 @@ dependencies:
 
   # required dependencies
   - python-dateutil
-  - numpy
+  - numpy<2
   - pytz
   - pip
 

ci/deps/actions-311.yaml

@@ -20,7 +20,7 @@ dependencies:
 
   # required dependencies
   - python-dateutil
-  - numpy
+  - numpy<2
   - pytz
 
   # optional dependencies

ci/deps/actions-39-minimum_versions.yaml

@@ -22,7 +22,7 @@ dependencies:
 
   # required dependencies
   - python-dateutil=2.8.2
-  - numpy=1.22.4
+  - numpy=1.22.4, <2
   - pytz=2020.1
 
   # optional dependencies

ci/deps/actions-39.yaml

@@ -20,7 +20,7 @@ dependencies:
 
   # required dependencies
   - python-dateutil
-  - numpy
+  - numpy<2
   - pytz
 
   # optional dependencies

ci/deps/actions-pypy-39.yaml

@@ -21,7 +21,7 @@ dependencies:
   - hypothesis>=6.46.1
 
   # required
-  - numpy
+  - numpy<2
   - python-dateutil
   - pytz
   - pip:

ci/deps/circle-310-arm64.yaml

@@ -20,7 +20,7 @@ dependencies:
 
   # required dependencies
   - python-dateutil
-  - numpy
+  - numpy<2
   - pytz
 
   # optional dependencies

environment.yml

@@ -21,7 +21,7 @@ dependencies:
 
   # required dependencies
   - python-dateutil
-  - numpy
+  - numpy<2
   - pytz
 
   # optional dependencies

pyproject.toml

@@ -10,7 +10,7 @@ requires = [
     # we don't want to force users to compile with 1.25 though
     # (Ideally, in the future, though, oldest-supported-numpy can be dropped when our min numpy is 1.25.x)
     "oldest-supported-numpy>=2022.8.16; python_version<'3.12'",
-    "numpy>=1.26.0; python_version>='3.12'",
+    "numpy>=1.26.0,<2; python_version>='3.12'",
     "versioneer[toml]"
 ]
 
@@ -29,9 +29,9 @@ authors = [
 license = {file = 'LICENSE'}
 requires-python = '>=3.9'
 dependencies = [
-  "numpy>=1.22.4; python_version<'3.11'",
-  "numpy>=1.23.2; python_version=='3.11'",
-  "numpy>=1.26.0; python_version>='3.12'",
+  "numpy>=1.22.4,<2; python_version<'3.11'",
+  "numpy>=1.23.2,<2; python_version=='3.11'",
+  "numpy>=1.26.0,<2; python_version>='3.12'",
   "python-dateutil>=2.8.2",
   "pytz>=2020.1",
   "tzdata>=2022.1"

requirements-dev.txt

@@ -12,7 +12,7 @@ pytest-xdist>=2.2.0
 pytest-asyncio>=0.17.0
 coverage
 python-dateutil
-numpy
+numpy<2
 pytz
 beautifulsoup4>=4.11.1
 blosc