如何在Python中匹配没有特定字符的字符串？

Question

Which regular expression pattern will match a substring not containing a specific character in Python? For example, I have the string "abc,5 * de" , and I want to match "abc" and "5 * de" as two substrings, but not the , .

Answer 1

Use a negated character class that contains all characters you don't want to match.

Something like

[^,]+

See it here on Regexr

The [] denotes the character class and the ^ as first character makes it a negated class.

Answer 2

s = "abc,5 * de"
result = s.split(',')
result[0] # "abc"
result[1] # "5* de"

Regex expressions are not always the only way to solve string problems.

Answer 3

I don't know Python, but with all the regexp engines I know, that would be /[^,]*/ . Or if Python has a built-in function to split a string on a regexp, then you could just split on /,/ .