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ERROR: test_write_with_optimization (test.test_zipfile.PyZipFileTests)
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Traceback (most recent call last):
  File "C:\Program Files\Python 3.5\lib\test\test_zipfile.py", line 771, in test_write_with_optimization
    zipfp.writepy(packagedir)
  File "C:\Program Files\Python 3.5\lib\zipfile.py", line 1756, in writepy
    fname, arcname = self._get_codename(initname[0:-3], basename)
  File "C:\Program Files\Python 3.5\lib\zipfile.py", line 1882, in _get_codename
    if not _compile(file_py, optimize=self._optimize):
  File "C:\Program Files\Python 3.5\lib\zipfile.py", line 1819, in _compile
    py_compile.compile(file, doraise=True, optimize=optimize)
  File "C:\Program Files\Python 3.5\lib\py_compile.py", line 143, in compile
    importlib._bootstrap_external._write_atomic(cfile, bytecode, mode)
  File "<frozen importlib._bootstrap_external>", line 106, in _write_atomic
PermissionError: [Errno 13] Permission denied: 'C:\\Program Files\\Python 3.5\\lib\\email\\__pycache__\\__init__.cpython-35.opt-1.pyc.755404532528'