- means zero or more and + means one or more. So the difference is that the empty string would match the second expression but not the first. Note that + is available in extended and Perl-compatible regular expressions and is not available in Basic RE. * is available in all three RE dialects. 26
What is a * in Regex?
- means 0 or more instances of the preceding regex token 18
What is the difference between characters and * in regular expressions in Python?
Character in regular expressions matches any character. … * means: matches a sequence of length 0 or more containing characters. 19
What does D+ mean in regex?
\d is a digit (a character in the 09 range) and + means 1 or more times. Thus \ d+ matches 1 or more digits. It’s about as easy as regular expressions. You should try to read some more about regular expressions. For example, Google has many results for the regular expression tutorial. 16