python initialize dictionary with keys code example

Example 1: initialize a dict from list

dict.fromkeys(["key1", "key2", "key3"], "value")
{'key1': 'value', 'key2': 'value', 'key3': 'value'}

Example 2: python dict initialize

a = {'import': 'trade', 1: 7.8}
# OR
a = dict({'import': 'trade', 1: 7.8})