[英]Regex expression to remove specific characters
I'm currently trying to get into regex expressions - at the moment I want to write one which acts as follows:我目前正在尝试使用正则表达式 - 目前我想编写一个如下所示的表达式:
import regex
a = '[[0.1 0.1 0.1 0.1]\n [1.2 1.2 1.2 1.2]\n [2.3 2.3 2.3 2.3]\n [3.4 3.4 3.4 3.4]]'
a_transformed = re.sub(regex_expression, a)
# a_transformed = '0.1 0.1 0.1 0.1 1.2 1.2 1.2 1.2 2.3 2.3 2.3 2.3 3.4 3.4 3.4 3.4'
Basically I only need to sub all occurences of (,n,[,]), but currently I'm struggling to get the expression right.基本上我只需要子 (,n,[,]) 的所有出现,但目前我正在努力让表达式正确。
Thanks for the help in advance!我在这里先向您的帮助表示感谢!
You can try the following:您可以尝试以下方法:
>>> re.sub(r'[^\d. ]', '', a)
'0.1 0.1 0.1 0.1 1.2 1.2 1.2 1.2 2.3 2.3 2.3 2.3 3.4 3.4 3.4 3.4'
Here '[^\d. ]'
这里
'[^\d. ]'
'[^\d. ]'
means anything except a digit, '.'
'[^\d. ]'
表示除数字之外的任何内容, '.'
and space like characters.和空格一样的字符。
^
inside []
means negate this character group. []
内的^
表示否定该字符组。
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