ConnectionRefusedErrorConnectionRefusedError
The connection was refused because no server is listening on the target address.
KeyErrorA dictionary key was not found in the dictionary.
You tried to access a dictionary key that does not exist. The key may be misspelled, the data structure may be different than expected, or the key was not yet added to the dictionary.
Use dict.get(key, default) to provide a default value. Check key existence with 'if key in dict'. Use collections.defaultdict for auto-initialized values. Use try-except KeyError for expected missing keys.
d = {"a": 1}; d["b"] # KeyError: 'b'ConnectionRefusedErrorThe connection was refused because no server is listening on the target address.
TabErrorIndentation uses an inconsistent mix of tabs and spaces.
OverflowErrorThe result of an arithmetic operation is too large to be represented.
BlockingIOErrorAn I/O operation would block on a non-blocking object.
TypeError: object is not callableAn object that is not a function was called with parentheses ().
ssl.SSLCertVerificationError: certificate verify failedSSL certificate verification failed during a secure connection.