Simple way to convert list into dict with False values [duplicate]

Question

What is the simplest way to convert some list like

l = ['a', 'b', 'c']

...into a dict of following form:

d = {'a': False, 'b': False, 'c': False}

Answer 1

As enke suggested you can use fromkeys method of dict class to convert the list or any other iterable into a dict by a fixed value for all keys.

In [1]: a = [1,2, "hello"]                                                                                                                                                      

In [2]: dict.fromkeys(a, False)                                                                                                                                                 
Out[2]: {1: False, 2: False, 'hello': False}

And also you can use dict comprehension as below:

In [1]: a = [1,2, "hello"]                                                                                                                                                      

In [2]: {key: False for key in a}                                                                                                                                               
Out[2]: {1: False, 2: False, 'hello': False}

Answer 2

Just use dict.fromkeys()

d = dict.fromkeys(l, False)

Test it online.

Answer 3

You can use dict-comprehension, Pythonic-style:

>>> l = ['a', 'b', 'c']
>>> dct = {x: False for x in l}
>>> dct
{'a': False, 'b': False, 'c': False}