Python collections cheat sheet

sum_of_elements  = sum(<collection>)
elementwise_sum  = [sum(pair) for pair in zip(list_a, list_b)]
sorted_by_second = sorted(<collection>, key=lambda el: el[1])
sorted_by_both   = sorted(<collection>, key=lambda el: (el[1], el[0]))
flatter_list     = list(itertools.chain.from_iterable(<list>))
product_of_elems = functools.reduce(lambda out, el: out * el, <collection>)
list_of_chars    = list(<str>)

Source: gto76.github.io

Similar codes

0 vote269 views1 answer
Data[:,:2]
Python
24 votes261 views2 answers
Python bs4 install
Python
0 vote268 views2 answers
Python multiply 2 variables
Python
0 vote289 views1 answer
Aioredis pubsub example
Python
0 vote278 views1 answer
Python cv2 how to update image
Python
0 vote256 views1 answer
Plynomial regression implementation python
Python
1 vote262 views1 answer
Flask app route in different files
Python Flask
0 vote257 views1 answer
Histogram matplotliub
Python
0 vote276 views1 answer
Degree symbol in python
Python
11 votes313 views5 answers
Pandas dataframe delete column
Python