'dict' object has no attribute 'has_key'

Question

While traversing a graph in Python, a I\'m receiving this error:

\'dict\' object has no attribute \'has_key\'

Here is my code:

Answer 1

has_key has been deprecated in Python 3.0. Alternatively you can use 'in'

graph={'A':['B','C'],
   'B':['C','D']}

print('A' in graph)
>> True

print('E' in graph)
>> False