[英]Using regex for two delimiters to extract strings
The question How to delete the words between two delimiters? 问题如何删除两个定界符之间的单词? was really helpful to me. 对我真的很有帮助。
So I have a string like this: 所以我有一个像这样的字符串:
string = $blabla$blav:1085$350_X[7:0]
I am trying to remove whatever is inside the '[]'
to make the whole thing be $blabla$blav:1085$350_X
. 我试图删除'[]'
内部的所有内容,使整个内容变为$blabla$blav:1085$350_X
。
I tried all these: 我尝试了所有这些:
re.sub('[[^]]+]', '', string)
re.sub(r'[.+?]', '', string)
re.sub('[.*?]', '', string)
Any method to do it with regex involving one step please. 使用正则表达式的任何方法都需要一步。
Also, I need to capture that string [7:0]
for later use. 另外,我需要捕获该字符串[7:0]
以供以后使用。
Try the regex \\[([0-9]+\\:[0-9]+)\\]$
. 尝试正则表达式\\[([0-9]+\\:[0-9]+)\\]$
。 It matches [X:Y]
where X
and Y
are numbers and the whole thing is at the end of a string. 它与[X:Y]
匹配,其中X
和Y
是数字,整个内容位于字符串的末尾。 There is only one group in the regex that returns the two numbers X:Y
without the [
and ]
正则表达式中只有一组返回两个数字X:Y
而没有[
和]
Use this to replace the string: 使用它替换字符串:
import re
re.sub('\[([0-9]+\:[0-9]+)\]$', '', string)
You can use this \\[([0-9]+)\\:([0-9]+)\\]$
to match the two numbers in two groups. 您可以使用此\\[([0-9]+)\\:([0-9]+)\\]$
来匹配两组中的两个数字。
numbersRegex = re.search('\[([0-9]+)\:([0-9]+)\]$', string)
number1 = numbersRegex.group(1)
number2 = numbersRegex.group(2)
bothNumbers = numbersRegex.group(0)
It is important to use regex instead of just string indexes in case the numbers are two or more digits. 如果数字是两个或多个数字,则使用正则表达式而不是仅使用字符串索引非常重要。 Otherwise, it is fine to indices. 否则,可以建立索引。
If the [X:Y]
is not at the end of the string, just remove the $
from the regex. 如果[X:Y]
不在字符串末尾,只需从正则表达式中删除$
。
You can use this website and paste the regex there. 您可以使用此网站并将正则表达式粘贴到此处。 It provides explanation and a text field to test it. 它提供说明和文本字段以进行测试。
You can use rsplit
with maxsplit=1
to make sure it only split on last [
, 您可以将rsplit
与maxsplit=1
一起使用,以确保仅在最后一个[
,
string = "$blabla$blav:1085$350_X[7:0]"
s_string = string.rsplit('[', maxsplit=1)
left = s_string[0]
right = "[" + s_string[-1]
print(left)
print(right)
# output
$blabla$blav:1085$350_X
[7:0]
If you must use regex, then try positive lookahead to match last occurrence of [
, 如果必须使用正则表达式,请尝试正向查找以匹配上一次出现的[
,
import re
string = "$blabla$blav:1085$350_X[7:0]"
regex = r'(^.*(?=\[))(.*)'
ss = re.match(regex, string)
left = ss.group(1)
right = ss.group(2)
print(left)
print(right)
# output
$blabla$blav:1085$350_X
[7:0]
string= '$blabla$blav:1085$350_X[7:0]'
cut_string = string.split('[')[0] # = '$blabla$blav:1085$350_X'
bracket_data = string.split('[')[1].replace(']', '') # = '7:0'
Dirty, but it just werks. 脏,但它只是奇怪。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.