W601.md

Pattern: Use of deprecated .has_key()

Issue: -

Description

.has_key() was deprecated in Python 2. It is recommended to use the in operator instead.

Example of incorrect code:

my_dict = {'hello': 'world'}
if my_dict.has_key('hello'):
    print('It works!')

Example of correct code:

my_dict = {'hello': 'world'}
if 'hello' in my_dict:
    print('It works!')

Further Reading

• https://docs.python.org/2/library/stdtypes.html#dict.has_key