Skip to content

STA 663

Jump to bottom
changwu edited this page Mar 8, 2016 · 1 revision

移除空白, 標點符號

快, 使用 string, 但是必須知道有那些特殊符號要處理

import string
s = s.translate(None, string.punctuation).translate(None, string.whitespace).replace('“', '').replace('—', '').replace('”', '').replace('‐', '').replace('’', '')

regex

import re
print re.sub('[^A-Za-z0-9]+', '', s)

isalnum()

s = ''.join(l for l in s if l.isalnum())

Sliding window

s = 'abcdefgh'
print [s[i:i+3] for i in xrange(len(s)-2)]

['abc', 'bcd', 'cde', 'def', 'efg', 'fgh']

避免重複

print [(a, b, c) for a in range(1, 101) 
                   for b in range(a, 101)
                    for c in range(b, 101)
                     if a ** 2 + b ** 2 == c ** 2]
                     
[(3, 4, 5), (5, 12, 13), (6, 8, 10), (7, 24, 25), (8, 15, 17), (9, 12, 15), (9, 40, 41), (10, 24, 26), (11, 60, 61), (12, 16, 20), (12, 35, 37), (13, 84, 85), (14, 48, 50), (15, 20, 25), (15, 36, 39), (16, 30, 34), (16, 63, 65), (18, 24, 30), (18, 80, 82), (20, 21, 29), (20, 48, 52), (21, 28, 35), (21, 72, 75), (24, 32, 40), (24, 45, 51), (24, 70, 74), (25, 60, 65), (27, 36, 45), (28, 45, 53), (28, 96, 100), (30, 40, 50), (30, 72, 78), (32, 60, 68), (33, 44, 55), (33, 56, 65), (35, 84, 91), (36, 48, 60), (36, 77, 85), (39, 52, 65), (39, 80, 89), (40, 42, 58), (40, 75, 85), (42, 56, 70), (45, 60, 75), (48, 55, 73), (48, 64, 80), (51, 68, 85), (54, 72, 90), (57, 76, 95), (60, 63, 87), (60, 80, 100), (65, 72, 97)]
Clone this wiki locally