Hidden Treasures - Core Python by Mayank Johri & Mayank Johri

Author:Mayank Johri & Mayank Johri [Johri, Mayank]
Language: eng
Format: azw3
Publisher: GitBook
Published: 2018-02-24T16:00:00+00:00

Deepcopy a list

ori = [1, 2, 3, 4, 5, 6] dup = ori[:] print(id(ori)) print(id(dup))

140307524228424 140307524230408

dup.insert(0, 29) print(ori) print(dup)

[1, 2, 3, 4, 5, 6] [29, 1, 2, 3, 4, 5, 6]

Most common elements in an iterable

ori = [1, 2, 3, 3, 4, 5, 5, 4, 5, 6, 4, 5, 6, ] from collections import Counter counter = Counter(ori) print(counter.most_common())

[(5, 4), (4, 3), (3, 2), (6, 2), (1, 1), (2, 1)]

Dictionaries

converting dictionry keys to tuple

tuple({'aa': 0, 'bb': 1, 'cc': 2, 'dd': 3, 'ee': 4})

('aa', 'bb', 'cc', 'dd', 'ee')

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