GAE/p + boto3 で、ImportError: No module named _winreg

  File "C:\Proj\appspot\get---ip\botocore\session.py", line 470, in user_agent

    platform.system(),

  File "C:\Python27\lib\platform.py", line 1263, in system

    return uname()[0]

  File "C:\Python27\lib\platform.py", line 1159, in uname

    release,version,csd,ptype = win32_ver()

  File "C:\Python27\lib\platform.py", line 632, in win32_ver

    from _winreg import OpenKeyEx, QueryValueEx, CloseKey, HKEY_LOCAL_MACHINE

  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\devappserver2\python\sandbox.py", line 963, in load_module

    raise ImportError('No module named %s' % fullname)

ImportError: No module named _winreg

C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\devappserver2\python\sandbox.py

_WHITE_LIST_C_MODULES に必要なモジュール名を追加します。例：

_WHITE_LIST_C_MODULES = [
    'array',
    '_ast',
    'binascii',

    ...

    'zlib',
    '_winreg',
    '_ssl',
    '_ctypes',
]

Stop → Run で、アプリを再起動します。