Limit python version. TensorFlow is currently >=3.8 (soon >=3.9).

We can't realistically support older versions. Sorry!

#2213

You can always access older versions by installing from a specific hash.

PiperOrigin-RevId: 520956159

Author: MarkDaoust

setup.py

@@ -33,10 +33,6 @@
     'pyyaml',
 ]
 
-# Dataclasses is in-built from py >=3.7. This version is a backport for py 3.6.
-if (sys.version_info.major, sys.version_info.minor) == (3, 6):
-  REQUIRED_PKGS.append('dataclasses')
-
 VIS_REQUIRE = [
     'numpy',
     'PILLOW',
@@ -46,6 +42,7 @@
 # https://setuptools.readthedocs.io/en/latest/setuptools.html#new-and-changed-setup-keywords
 setup(
     name=project_name,
+    python_requires='>=3.8',
     version=version,
     description=DOCLINES[0],
     long_description='\n'.join(DOCLINES[2:]),