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-rw-r--r-- | Lib/urllib.py | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/Lib/urllib.py b/Lib/urllib.py index a818adf..02edb3b 100644 --- a/Lib/urllib.py +++ b/Lib/urllib.py @@ -87,6 +87,7 @@ class URLopener: def __init__(self, proxies=None): if proxies is None: proxies = getproxies() + assert hasattr(proxies, 'has_key'), "proxies must be a mapping" self.proxies = proxies server_version = "Python-urllib/%s" % __version__ self.addheaders = [('User-agent', server_version)] |