问题描述

我需要帮助创建正则表达式来获取括号之间的数字当我的值介于单词PIC"和."之间时

I need help creating a Regex to get numbers between parenthesis when my values are between word "PIC" and the "."

我得到了这些记录，需要能够提取 () 之间的值

I got this records and need to be able to extract values between ()

PIC S9(02)V9(05).    I need this result "02 05"
PIC S9(04).          I need this result "04"
PIC S9(03).          I need this result "03"
PIC S9(03)V9(03).    I need this result "03 03" 
PIC S9(02)V9(03).    I need this result "02 03"
PIC S9(04).          I need this result "04"  
PIC S9(13)V9(03).    I need this result "13 03"

我尝试了以下方法，但它不起作用.

I have try the below but it doesnt work.

s = "PIC S9(02)V9(05)."
m = re.search(r"([0-9]+([0-9]))", s)
print m.group(1)

推荐答案

你可以使用 re.findall() 查找括号内的所有数字:

You can use re.findall() to find all numbers within the parenthesis:

>>> import re
>>> l = [
...     "PIC S9(02)V9(05).",
...     "PIC S9(04).",
...     "PIC S9(03).",
...     "PIC S9(03)V9(03).",
...     "PIC S9(02)V9(03).",
...     "PIC S9(04).",
...     "PIC S9(13)V9(03)."
... ]
>>> pattern = re.compile(r"((d+))")
>>> for item in l:
...     print(pattern.findall(item))
... 
['02', '05']
['04']
['03']
['03', '03']
['02', '03']
['04']
['13', '03']

其中 ( 和 ) 将匹配文字括号(需要用反斜杠转义，因为它们具有特殊含义).(d+) 是一个捕获组 匹配一个或多个数字.

where ( and ) would match the literal parenthesis (needed to be escaped with a backslash because of the special meaning they have). (d+) is a capturing group that would match one or more digits.

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