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bpo-31711: On SSLObject.write method, added assert that data has content. #17671

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5 changes: 4 additions & 1 deletion Lib/ssl.py
Original file line number Diff line number Diff line change
Expand Up @@ -894,7 +894,10 @@ def write(self, data):

The 'data' argument must support the buffer interface.
"""
return self._sslobj.write(data)
if data:
return self._sslobj.write(data)
else:
return 0

def getpeercert(self, binary_form=False):
"""Returns a formatted version of the data in the certificate provided
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