DEPS: drop 3.6 (pandas-dev#34472)

Author: fangchenli

.travis.yml

@@ -45,7 +45,7 @@ matrix:
         - JOB="3.7, arm64" PYTEST_WORKERS=8 ENV_FILE="ci/deps/travis-37-arm64.yaml" PATTERN="(not slow and not network and not clipboard)"
 
     - env:
-        - JOB="3.6, locale" ENV_FILE="ci/deps/travis-36-locale.yaml" PATTERN="((not slow and not network and not clipboard) or (single and db))" LOCALE_OVERRIDE="zh_CN.UTF-8" SQL="1"
+        - JOB="3.7, locale" ENV_FILE="ci/deps/travis-37-locale.yaml" PATTERN="((not slow and not network and not clipboard) or (single and db))" LOCALE_OVERRIDE="zh_CN.UTF-8" SQL="1"
       services:
         - mysql
         - postgresql
@@ -54,7 +54,7 @@ matrix:
         # Enabling Deprecations when running tests
         # PANDAS_TESTING_MODE="deprecate" causes DeprecationWarning messages to be displayed in the logs
         # See pandas/_testing.py for more details.
-        - JOB="3.6, coverage" ENV_FILE="ci/deps/travis-36-cov.yaml" PATTERN="((not slow and not network and not clipboard) or (single and db))" PANDAS_TESTING_MODE="deprecate" COVERAGE=true SQL="1"
+        - JOB="3.7, coverage" ENV_FILE="ci/deps/travis-37-cov.yaml" PATTERN="((not slow and not network and not clipboard) or (single and db))" PANDAS_TESTING_MODE="deprecate" COVERAGE=true SQL="1"
       services:
         - mysql
         - postgresql

ci/azure/posix.yml

@@ -9,40 +9,17 @@ jobs:
   strategy:
     matrix:
       ${{ if eq(parameters.name, 'macOS') }}:
-        py36_macos:
-          ENV_FILE: ci/deps/azure-macos-36.yaml
-          CONDA_PY: "36"
+        py37_macos:
+          ENV_FILE: ci/deps/azure-macos-37.yaml
+          CONDA_PY: "37"
           PATTERN: "not slow and not network"
 
       ${{ if eq(parameters.name, 'Linux') }}:
         py36_minimum_versions:
-          ENV_FILE: ci/deps/azure-36-minimum_versions.yaml
-          CONDA_PY: "36"
+          ENV_FILE: ci/deps/azure-37minimum_versions.yaml
+          CONDA_PY: "37"
           PATTERN: "not slow and not network and not clipboard"
 
-        py36_locale_slow_old_np:
-          ENV_FILE: ci/deps/azure-36-locale_slow.yaml
-          CONDA_PY: "36"
-          PATTERN: "slow"
-          # pandas does not use the language (zh_CN), but should support different encodings (utf8)
-          # we should test with encodings different than utf8, but doesn't seem like Ubuntu supports any
-          LANG: "zh_CN.utf8"
-          LC_ALL: "zh_CN.utf8"
-          EXTRA_APT: "language-pack-zh-hans"
-
-        py36_slow:
-          ENV_FILE: ci/deps/azure-36-slow.yaml
-          CONDA_PY: "36"
-          PATTERN: "slow"
-
-        py36_locale:
-          ENV_FILE: ci/deps/azure-36-locale.yaml
-          CONDA_PY: "36"
-          PATTERN: "not slow and not network"
-          LANG: "it_IT.utf8"
-          LC_ALL: "it_IT.utf8"
-          EXTRA_APT: "language-pack-it xsel"
-
         #py36_32bit:
         #  ENV_FILE: ci/deps/azure-36-32bit.yaml
         #  CONDA_PY: "36"

ci/azure/windows.yml

@@ -9,13 +9,13 @@ jobs:
   strategy:
     matrix:
       py36_np15:
-        ENV_FILE: ci/deps/azure-windows-36.yaml
-        CONDA_PY: "36"
+        ENV_FILE: ci/deps/azure-windows-37.yaml
+        CONDA_PY: "37"
         PATTERN: "not slow and not network"
 
       py37_np18:
-        ENV_FILE: ci/deps/azure-windows-37.yaml
-        CONDA_PY: "37"
+        ENV_FILE: ci/deps/azure-windows-38.yaml
+        CONDA_PY: "38"
         PATTERN: "not slow and not network"
 
   steps:

ci/deps/azure-36-minimum_versions.yaml renamed to ci/deps/azure-37-minimum_versions.yaml

@@ -14,7 +14,7 @@ dependencies:
 
   # pandas dependencies
   - beautifulsoup4=4.6.0
-  - bottleneck=1.2.1
+  - bottleneck=1.3.1
   - jinja2=2.8
   - numba=0.46.0
   - numexpr=2.6.2

ci/deps/azure-macos-36.yaml renamed to ci/deps/azure-macos-37.yaml

@@ -2,7 +2,7 @@ name: pandas-dev
 channels:
   - defaults
 dependencies:
-  - python=3.6.*
+  - python=3.7.*
 
   # tools
   - pytest>=5.0.1

ci/deps/azure-windows-36.yaml renamed to ci/deps/azure-windows-38.yaml

@@ -3,7 +3,7 @@ channels:
   - conda-forge
   - defaults
 dependencies:
-  - python=3.6.*
+  - python=3.8.*
 
   # tools
   - cython>=0.29.16
@@ -19,7 +19,7 @@ dependencies:
   - matplotlib=3.0.2
   - numba
   - numexpr
-  - numpy=1.15.*
+  - numpy=1.16.*
   - openpyxl
   - jinja2
   - pyarrow>=0.13.0

ci/deps/travis-36-cov.yaml renamed to ci/deps/travis-37-cov.yaml

@@ -3,7 +3,7 @@ channels:
   - defaults
   - conda-forge
 dependencies:
-  - python=3.6.*
+  - python=3.7.*
 
   # tools
   - cython>=0.29.16
@@ -26,7 +26,7 @@ dependencies:
   - moto
   - nomkl
   - numexpr
-  - numpy=1.15.*
+  - numpy=1.16.*
   - odfpy
   - openpyxl
   - pandas-gbq

ci/deps/travis-36-locale.yaml renamed to ci/deps/travis-37-locale.yaml

@@ -3,7 +3,7 @@ channels:
   - defaults
   - conda-forge
 dependencies:
-  - python=3.6.*
+  - python=3.7.*
 
   # tools
   - cython>=0.29.16

environment.yml

@@ -3,7 +3,7 @@ channels:
   - conda-forge
 dependencies:
   # required
-  - numpy>=1.15
+  - numpy>=1.16
   - python=3
   - python-dateutil>=2.7.3
   - pytz

pandas/compat/numpy/__init__.py

@@ -8,19 +8,18 @@
 # numpy versioning
 _np_version = np.__version__
 _nlv = LooseVersion(_np_version)
-_np_version_under1p16 = _nlv < LooseVersion("1.16")
 _np_version_under1p17 = _nlv < LooseVersion("1.17")
 _np_version_under1p18 = _nlv < LooseVersion("1.18")
 _np_version_under1p19 = _nlv < LooseVersion("1.19")
 _np_version_under1p20 = _nlv < LooseVersion("1.20")
 _is_numpy_dev = ".dev" in str(_nlv)
 
 
-if _nlv < "1.15.4":
+if _nlv < "1.16.0":
     raise ImportError(
-        "this version of pandas is incompatible with numpy < 1.15.4\n"
+        "this version of pandas is incompatible with numpy < 1.16.0\n"
         f"your numpy version is {_np_version}.\n"
-        "Please upgrade numpy to >= 1.15.4 to use this pandas version"
+        "Please upgrade numpy to >= 1.16.0 to use this pandas version"
     )
 
 
@@ -65,7 +64,6 @@ def np_array_datetime64_compat(arr, *args, **kwargs):
 __all__ = [
     "np",
     "_np_version",
-    "_np_version_under1p16",
     "_np_version_under1p17",
     "_is_numpy_dev",
 ]

pandas/tests/api/test_api.py

@@ -193,7 +193,6 @@ class TestPDApi(Base):
         "_hashtable",
         "_lib",
         "_libs",
-        "_np_version_under1p16",
         "_np_version_under1p17",
         "_np_version_under1p18",
         "_is_numpy_dev",

pyproject.toml

@@ -5,16 +5,14 @@ requires = [
     "setuptools",
     "wheel",
     "Cython>=0.29.16",  # Note: sync with setup.py
-    "numpy==1.15.4; python_version=='3.6' and platform_system!='AIX'",
-    "numpy==1.15.4; python_version=='3.7' and platform_system!='AIX'",
+    "numpy==1.16.0; python_version=='3.7' and platform_system!='AIX'",
     "numpy==1.17.3; python_version>='3.8' and platform_system!='AIX'",
-    "numpy==1.16.0; python_version=='3.6' and platform_system=='AIX'",
     "numpy==1.16.0; python_version=='3.7' and platform_system=='AIX'",
     "numpy==1.17.3; python_version>='3.8' and platform_system=='AIX'",
 ]
 
 [tool.black]
-target-version = ['py36', 'py37', 'py38']
+target-version = ['py37', 'py38']
 exclude = '''
 (
     asv_bench/env

setup.py

@@ -33,7 +33,7 @@ def is_platform_mac():
     return sys.platform == "darwin"
 
 
-min_numpy_ver = "1.15.4"
+min_numpy_ver = "1.16.0"
 min_cython_ver = "0.29.16"  # note: sync with pyproject.toml
 
 try:
@@ -197,7 +197,6 @@ def build_extensions(self):
     "Intended Audience :: Science/Research",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.6",
     "Programming Language :: Python :: 3.7",
     "Programming Language :: Python :: 3.8",
     "Programming Language :: Cython",
@@ -771,7 +770,7 @@ def setup_package():
         long_description=LONG_DESCRIPTION,
         classifiers=CLASSIFIERS,
         platforms="any",
-        python_requires=">=3.6.1",
+        python_requires=">=3.7.1",
         extras_require={
             "test": [
                 # sync with setup.cfg minversion & install.rst