How to Capture Multiline Text Blocks with Regular Expressions in Python?

Regular Expression for Matching Multiline Text Blocks

In Python, matching text across multiple lines can be challenging. This article provides a concise solution to capturing multiline blocks and their associated line groups.

Consider the following text format:

some Varying TEXT

DSJFKDAFJKDAFJDSAKFJADSFLKDLAFKDSAF
[more of the above, ending with a newline]
[yep, there is a variable number of lines here]

(repeat the above a few hundred times).

The goal is to capture two groups: the "some Varying TEXT" line and the subsequent uppercase lines (sans newlines) in one capture group.

Lösungsansatz

re.compile(r"^(.+)\n((?:\n.+)+)", re.MULTILINE)

Erläuterung

• ^: Matches the start of a new line.
• .: Matches any character except a newline.
• : Matches one or more repetitions.
• n: Matches a newline character.
• (?:...) : Creates a non-capturing group that matches multiple occurrences of the pattern within the line.
• () Capture groups enclose the two parts of the match.

Beispiel

text = "some Varying TEXT\nDSJFKDAFJKDAFJDSAKFJADSFLKDLAFKDSAF\n[more of the above]\n[yep, there is a newline]\n(repeat the above)."
match = re.match(r"^(.+)\n((?:\n.+)+)", text, re.MULTILINE)
print(match.group(1))  # "some Varying Text"
print(match.group(2))  # "DSJFKDAFJKDAFJDSAKFJADSFLKDLAFKDSAF\n[more of the above]\n[yep, there is a newline]"

This approach utilizes Python's re module and its MULTILINE option to enable multiline matching and avoid anchoring issues.

The above is the detailed content of How to Capture Multiline Text Blocks with Regular Expressions in Python?. For more information, please follow other related articles on the PHP Chinese website!