Keyboard shortcuts

Press or to navigate between chapters

Press S or / to search in the book

Press ? to show this help

Press Esc to hide this help

Scoping issues

text = ['aaaa', 'bb', 'ccc ccc']

length_1 = [ len(s) for s in text ]
print(length_1) # [4, 2, 7]


length_2 = [ len(s) for x in text ]
print(length_2)  # [7, 7, 7]


List comprehensions don't create their own scope!