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Renamed the report since it's unsafe for sure.
This problem was previously called: Avoid unnecessary and possibly unsafe code from http.client.HTTPConnection.send. 
Imagine that the data parameter from HTTPConnection it's a file like object but it's not iterable, maybe some custom data wrapper.
the if hasattr(data, "read"): True branch will correctly send out the response then unnecessary continue to:
try:
 self.sock.sendall(data)
 except TypeError:
 if isinstance(data, collections.Iterable):
 for d in data:
 self.sock.sendall(d)
 else:
 raise TypeError("data should be a bytes-like object "
 "or an iterable, got %r" % type(data))
and crash!