3 hidden Python tips — First published in fullweb.io issue #60

3-hidden-python-tips.md

3 hidden Python tips 🐍

Hidden from beginner tutorials and seldom found in books.

1. You can multiply a string to repeated it:

>>> "HOOLI-"*2
'HOOLI-HOOLI-'

2. Chaining comparison operators:

>>> f = 2
>>>  1 < f < 3
True
>>>  1 < f < 3 < (f+2)
True

3. Flatten lists with sum():

>>> a = [[1,2,3], [4,5,6], [7,8,9]]
>>>  sum(a, [])
[1, 2, 3, 4, 5, 6, 7, 8, 9]