import os
import sys

from setuptools import find_packages, setup

import crispy_forms

if sys.argv[-1] == 'publish':
    if os.system("pip freeze | grep wheel"):
        print("wheel not installed.\nUse `pip install wheel`.\nExiting.")
        sys.exit()
    if os.system("pip freeze | grep twine"):
        print("twine not installed.\nUse `pip install twine`.\nExiting.")
        sys.exit()
    os.system("python setup.py sdist bdist_wheel")
    os.system("twine upload dist/*")
    print("You probably want to also tag the version now:")
    print("  git tag -a {} -m 'version {}'".format(crispy_forms.__version__, crispy_forms.__version__))
    print("  git push --tags")
    sys.exit()

setup(
    name='django-crispy-forms',
    version=crispy_forms.__version__,
    description="Best way to have Django DRY forms",
    long_description=open('README.rst').read(),
    classifiers=[
        "Development Status :: 5 - Production/Stable",
        "Environment :: Web Environment",
        "Framework :: Django",
        "Framework :: Django :: 2.2",
        "Framework :: Django :: 3.0",
        "License :: OSI Approved :: MIT License",
        "Operating System :: OS Independent",
        "Programming Language :: JavaScript",
        "Programming Language :: Python :: 3",
        "Programming Language :: Python :: 3.5",
        "Programming Language :: Python :: 3.6",
        "Programming Language :: Python :: 3.7",
        "Programming Language :: Python :: 3.8",
        "Topic :: Internet :: WWW/HTTP",
        "Topic :: Internet :: WWW/HTTP :: Dynamic Content",
        "Topic :: Software Development :: Libraries :: Python Modules",
    ],
    keywords=['forms', 'django', 'crispy', 'DRY'],
    author='Miguel Araujo',
    author_email='miguel.araujo.perez@gmail.com',
    url='https://github.com/django-crispy-forms/django-crispy-forms',
    license='MIT',
    packages=find_packages(exclude=['docs']),
    include_package_data=True,
    zip_safe=False,
)

setup.py
import os
import sys

from setuptools import find_packages, setup

import crispy_forms

if sys.argv[-1] == 'publish':
    if os.system("pip freeze | grep wheel"):
        print("wheel not installed.\nUse `pip install wheel`.\nExiting.")
        sys.exit()
    if os.system("pip freeze | grep twine"):
        print("twine not installed.\nUse `pip install twine`.\nExiting.")
        sys.exit()
    os.system("python setup.py sdist bdist_wheel")
    os.system("twine upload dist/*")
    print("You probably want to also tag the version now:")
    print("  git tag -a {} -m 'version {}'".format(crispy_forms.__version__, crispy_forms.__version__))
    print("  git push --tags")
    sys.exit()

setup(
    name='django-crispy-forms',
    version=crispy_forms.__version__,
    description="Best way to have Django DRY forms",
    long_description=open('README.rst').read(),
    classifiers=[
        "Development Status :: 5 - Production/Stable",
        "Environment :: Web Environment",
        "Framework :: Django",
        "Framework :: Django :: 2.2",
        "Framework :: Django :: 3.0",
        "License :: OSI Approved :: MIT License",
        "Operating System :: OS Independent",
        "Programming Language :: JavaScript",
        "Programming Language :: Python :: 3",
        "Programming Language :: Python :: 3.5",
        "Programming Language :: Python :: 3.6",
        "Programming Language :: Python :: 3.7",
        "Programming Language :: Python :: 3.8",
        "Topic :: Internet :: WWW/HTTP",
        "Topic :: Internet :: WWW/HTTP :: Dynamic Content",
        "Topic :: Software Development :: Libraries :: Python Modules",
    ],
    keywords=['forms', 'django', 'crispy', 'DRY'],
    author='Miguel Araujo',
    author_email='miguel.araujo.perez@gmail.com',
    url='https://github.com/django-crispy-forms/django-crispy-forms',
    license='MIT',
    packages=find_packages(exclude=['docs']),
    include_package_data=True,
    zip_safe=False,
    python_requires='>=3.5',
)

setup.py
diff --git a/setup.py b/setup.py
index 5c97f2d81..cf9a14c84 100644
--- a/setup.py
+++ b/setup.py
@@ -50,4 +50,5 @@
     packages=find_packages(exclude=['docs']),
     include_package_data=True,
     zip_safe=False,
+    python_requires='>=3.5',
 )

Specify Python version requirement (>=3.x)
https://github.com/django-crispy-forms/django-crispy-forms/blob/ba53410f752402436d84dc8ab00e2b6e1e67a74c/setup.py#L22

The drop of Python 2 support in release 1.9.0 has broken installation of the package for users of Python 2 because it does not specify that Python 3 is required.

The recommendation is specified here, including instructions for `setup.py`: 
https://packaging.python.org/guides/dropping-older-python-versions/

Would you mind adding the specification to the package?
This would also mean either re-releasing 1.9.0 :see_no_evil:  or update 1.9.0 directly in Pypi with that information (is it possible?) or releasing something like 1.9.0.1 or 1.9.1 and removing 1.9.0 from Pypi...
