non_wheel_packages.py

import subprocess

import requests


def print_all_non_wheels():
    output = subprocess.check_output(['pip', 'freeze']).decode()
    lines = [l.strip() for l in output.split('\n') if l.strip()]

    for line in lines:
        package, *_ = line.split('==')
        data = requests.get('https://pypi.python.org/pypi/{}/json'.format(package))

        if not data.status_code == 200:
            print('not on PyPI:', package)
            continue

        has_wheel = any(url['packagetype'] == 'bdist_wheel' for url in data.json()['urls'])
        if not has_wheel:
            print('not a wheel:', package)