Question

我开始使用RegEx，我想知道是否有人可以帮助我制作一个声明来转换坐标，如下所示：

145.00694,-37.80421,9 145.00686,-37.80382,9 145.00595,-37.8035,16 145.00586,-37.80301,16

到

145.00694,-37.80421
145.00686,-37.80382
145.00595,-37.8035 
145.00586,-37.80301

（去除最后一个逗号和值并将其转换为换行符。）

我无法弄清楚如何使用通配符来做类似的事情。任何帮助将不胜感激！感谢。

Answer 1

“有些人在遇到一个人时问题，想想'我知道，我会用常用表达。'现在他们有两个问题。“ - Jamie Zawinski

避免这个问题并使用字符串方法：

s="145.00694,-37.80421,9 145.00686,-37.80382,9 145.00595,-37.8035,16 145.00586,37.80301,16"

lines = s.split(' ') # each line is separated by ' '
for line in lines:
    a,b,c=line.split(',') # three parts, separated by ','
    print a,b

正则表达式有它们的用途，但这不是其中之一。

Answer 2

>>> import re
>>> s="145.00694,-37.80421,9 145.00686,-37.80382,9 145.00595,-37.8035,16 145.00586,-37.80301,16"
>>> print re.sub(",\d*\w","\n",s)
145.00694,-37.80421
145.00686,-37.80382
145.00595,-37.8035
145.00586,-37.80301

Answer 3

字符串方法似乎就足够了，正则表达式有点矫枉过正：

>>> s='145.00694,-37.80421,9 145.00686,-37.80382,9 145.00595,-37.8035,16 145.00586,-37.80301,16'
>>> print('\n'.join(line.rpartition(',')[0] for line in s.split()))
145.00694,-37.80421
145.00686,-37.80382
145.00595,-37.8035
145.00586,-37.80301

Answer 4

>>> s = '145.00694,37.80421,9 145.00686,-37.80382,9 145.00595,-37.8035,16 145.00586,-37.80301,16
>>> patt = '(%s,%s),%s' % (('[+-]?\d+\.?\d*', )*3)
>>> m = re.findall(patt, s)   
>>> m
['145.00694,37.80421', '145.00686,-37.80382', '145.00595,-37.8035', '145.00586,-37.80301']
>>> print '\n'.join(m)
145.00694,37.80421
145.00686,-37.80382
145.00595,-37.8035
145.00586,-37.80301

但我更喜欢不在这种情况下使用正则表达式

我喜欢SilentGhost解决方案

使用RegEx（或其他）将换行符“，**”替换为换行符

4 个答案: