Here is how to do dictionary comprehension in Python.

words = ['be', 'is', 'are'] 
word_length = {word: len(word) for word in words} 


{'be': 2, 'is': 2, 'are': 3}

A dictionary comprehension is a code expression that constructs a dictionary out of an original object. In this case, the original object is a list. The dictionary comprehension is constructing a dictionary that contains (1) the items of the list as keys and (2) the length of those items (i.e., number of characters) as value. 

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