Python: How to use RegEx in an if statement? Asked 12 years, 11 months ago Modified 2 years, 9 months ago Viewed 312k times

I'd like to use a variable inside a regex, how can I do this in Python?

11 Given that you are a beginner, I would recommend using glob in place of a quickly written file-walking-regex matcher. Snippets of functions using glob and a file-walking-regex matcher The below …

Jan 17, 2024 · 562 When I use the re.search() function to find matches in a block of text, the program exits once it finds the first match in the block of text. How do I do this repeatedly where the program …

Mar 11, 2013 · 7 Using Python's built-in ability to write lambda expressions, we could filter by an arbitrary regex operation as follows:

Sep 4, 2010 · I want to filter strings in a list based on a regular expression. Is there something better than [x for x in list if r.match(x)] ?

The answer proposed by @nhahtdh is valid, but I would argue less pythonic than the canonical example, which uses code less opaque than his regex manipulations and takes advantage of python's built-in …

Nov 27, 2010 · I would like to extract all the numbers contained in a string. Which is better suited for the purpose, regular expressions or the isdigit() method? Example: line = "hello 12 hi 89" …

re.finditer(pattern, string[, flags]) Return an iterator yielding MatchObject instances over all non-overlapping matches for the RE pattern in string. The string is scanned left-to-right, and matches are …

118 In order to replace text using regular expression use the re.sub function: sub (pattern, repl, string [, count, flags]) It will replace non-everlaping instances of pattern by the text passed as string.