Merge pull request #7294 from hawkinsp:py36

PiperOrigin-RevId: 384994957

.github/workflows/ci-build.yaml

@@ -50,18 +50,19 @@ jobs:
             num_generated_cases: 10
             use-latest-jaxlib: false
           - name-prefix: "with internal numpy/scipy"
-            python-version: 3.6
+            python-version: 3.7
             os: ubuntu-latest
             enable-x64: 1
-            # Test with numpy version that matches Google-internal version
-            package-overrides: "numpy==1.17.5 scipy==1.2.1"
+            # Test with numpy version that matches Google's internal version
+            package-overrides: "numpy==1.19.5 scipy==1.2.1"
             num_generated_cases: 10
             use-latest-jaxlib: false
           - name-prefix: "with 3.7"
             python-version: 3.7
             os: ubuntu-latest
             enable-x64: 0
-            package-overrides: "none"
+            # Test with the oldest legal NumPy version.
+            package-overrides: "numpy==1.17.5 scipy==1.2.1"
             num_generated_cases: 8
             # Test against latest jaxlib
             use-latest-jaxlib: true

CHANGELOG.md

@@ -11,12 +11,22 @@ PLEASE REMEMBER TO CHANGE THE '..main' WITH AN ACTUAL TAG in GITHUB LINK.
 ## jax 0.2.18 (unreleased)
 * [GitHub commits](https://github.com/google/jax/compare/jax-v0.2.17...main).
 
+* Breaking changes:
+  * Support for Python 3.6 has been dropped, per the
+    [deprecation policy](https://jax.readthedocs.io/en/latest/deprecation.html).
+    Please upgrade to a supported Python version.
+
 * Bug fixes:
   * Tightened the checks for lax.argmin and lax.argmax to ensure they are
     not used with invalid `axis` value, or with an empty reduction dimension.
     ({jax-issue}`#7196`)
 
 ## jaxlib 0.1.70 (unreleased)
+* Breaking changes:
+  * Support for Python 3.6 has been dropped, per the
+    [deprecation policy](https://jax.readthedocs.io/en/latest/deprecation.html).
+    Please upgrade to a supported Python version.
+
 
 ## jaxlib 0.1.69 (July 9 2021)
 * Fix bugs in TFRT CPU backend that results in incorrect results.

build/build.py

@@ -73,8 +73,8 @@ def get_python_version(python_bin_path):
   return major, minor
 
 def check_python_version(python_version):
-  if python_version < (3, 6):
-    print("ERROR: JAX requires Python 3.6 or newer, found ", python_version)
+  if python_version < (3, 7):
+    print("ERROR: JAX requires Python 3.7 or newer, found ", python_version)
     sys.exit(-1)
 
 

build/build_jaxlib_wheels.sh

@@ -3,7 +3,7 @@ set -xev
 
 source "$(dirname $(realpath $0))/build_jaxlib_wheels_helpers.sh"
 
-PYTHON_VERSIONS="3.6.8 3.7.2 3.8.0 3.9.0"
+PYTHON_VERSIONS="3.7.2 3.8.0 3.9.0"
 CUDA_VERSIONS="10.1 10.2 11.0 11.1"
 CUDA_VARIANTS="cuda" # "cuda-included"
 

build/build_jaxlib_wheels_macos.sh

@@ -45,7 +45,6 @@ build_jax () {
 
 
 rm -fr dist
-build_jax 3.6.8 1.17.3 1.2.0
 build_jax 3.7.2 1.17.3 1.2.0
 build_jax 3.8.0 1.17.3 1.3.2
 build_jax 3.9.0 1.19.4 1.5.4

jaxlib/setup.py

@@ -31,7 +31,7 @@ setup(
     author='JAX team',
     author_email='jax-dev@google.com',
     packages=['jaxlib', 'jaxlib.xla_extension-stubs'],
-    python_requires='>=3.6',
+    python_requires='>=3.7',
     install_requires=['scipy', 'numpy>=1.17', 'absl-py', 'flatbuffers >= 1.12, < 3.0'],
     url='https://github.com/google/jax',
     license='Apache-2.0',

setup.py

@@ -34,7 +34,7 @@ setup(
     author_email='jax-dev@google.com',
     packages=find_packages(exclude=["examples"]),
     package_data={'jax': ['py.typed']},
-    python_requires='>=3.6',
+    python_requires='>=3.7',
     install_requires=[
         'numpy>=1.17',
         'absl-py',
@@ -63,7 +63,6 @@ setup(
     url='https://github.com/google/jax',
     license='Apache-2.0',
     classifiers=[
-        "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",

tests/scipy_optimize_test.py

@@ -167,7 +167,9 @@ class TestLBFGS(jtu.JaxTestCase):
     jax_res = min_op(x0)
 
     # Note that without bounds, L-BFGS-B is just L-BFGS
-    scipy_res = scipy.optimize.minimize(func(np), x0, method='L-BFGS-B').x
+    with jtu.ignore_warning(category=DeprecationWarning,
+                            message=".*tostring.*is deprecated.*"):
+      scipy_res = scipy.optimize.minimize(func(np), x0, method='L-BFGS-B').x
 
     if func.__name__ == 'matyas':
       # scipy performs badly for Matyas, compare to true minimum instead