This tested snippet should do it:
import re
line = re.sub(r"</?\[\d+>", "", line)
Edit: Here's a commented version explaining how it works:
line = re.sub(r"""
(?x) # Use free-spacing mode.
< # Match a literal '<'
/? # Optionally match a '/'
\[ # Match a literal '['
\d+ # Match one or more digits
> # Match a literal '>'
""", "", line)
Regexes are fun! But I would strongly recommend spending an hour or two studying the basics. For starters, you need to learn which characters are special: "metacharacters" which need to be escaped (i.e. with a backslash placed in front - and the rules are different inside and outside character classes.) There is an excellent online tutorial at: www.regular-expressions.info. The time you spend there will pay for itself many times over. Happy regexing!
Answer from ridgerunner on Stack Overflow Top answer 1 of 7
882
This tested snippet should do it:
import re
line = re.sub(r"</?\[\d+>", "", line)
Edit: Here's a commented version explaining how it works:
line = re.sub(r"""
(?x) # Use free-spacing mode.
< # Match a literal '<'
/? # Optionally match a '/'
\[ # Match a literal '['
\d+ # Match one or more digits
> # Match a literal '>'
""", "", line)
Regexes are fun! But I would strongly recommend spending an hour or two studying the basics. For starters, you need to learn which characters are special: "metacharacters" which need to be escaped (i.e. with a backslash placed in front - and the rules are different inside and outside character classes.) There is an excellent online tutorial at: www.regular-expressions.info. The time you spend there will pay for itself many times over. Happy regexing!
2 of 7
66
str.replace() does fixed replacements. Use re.sub() instead.
Note.nkmk.me
note.nkmk.me › home › python
Replace Strings in Python: replace(), translate(), and Regex
May 4, 2025 - Use the | operator to match multiple patterns. Each pattern may include special regex characters or literal substrings. This allows you to replace different substrings with the same string.
regex - Python string.replace regular expression - Stack Overflow
I have a parameter file of the form: parameter-name parameter-value Where the parameters may be in any order but there is only one parameter per line. I want to replace one parameter's parameter-... More on stackoverflow.com
Replace (complicated) RegEx with readable expressions in Python
If you relly want to make it easier to use make it strongly typed as right now it just Look like verbose version of regex with the same drawbacks and more oputrtunity to misspell something or dont know the keyword More on reddit.com
1
4
July 12, 2023Regex to find and replace with same string plus a suffix
You can do it in sed like this: sed -i.bak "s/^(void .*typeA)/\1_suffix/g" temp More on reddit.com
2
3
October 17, 2022Regex.Replace headache? How to replace \n in a text with regular expressions?
I recommend using one of those websites where you can enter regex to see how it works instead of trying to write code. You need to look into which characters in the pattern needs to be escaped, like the forward slash. Not sure if reddit markdown removed backslashes or not, Try something like \/\/.*$ ``` More on reddit.com
10
0
January 8, 202506:32
python regex dynamic replacements (intermediate) anthony explains ...
05:44
#78 How to Search and Replace Strings in Python using Regex - YouTube
01:56
Python Regex: How To Replace All Substrings In a String - YouTube
03:48
Python re.sub() Tutorial: Text Substitution with Regular Expressions ...
03:06
Replace a String With .replace() (Video) – Real Python
python string replace by regex
Python documentation
docs.python.org › 3 › library › re.html
re — Regular expression operations
Source code: Lib/re/ This module provides regular expression matching operations similar to those found in Perl. Both patterns and strings to be searched can be Unicode strings ( str) as well as 8-...
W3Schools
w3schools.com › python › python_regex.asp
Python RegEx
RegEx can be used to check if a string contains the specified search pattern. ... Python has a built-in package called re, which can be used to work with Regular Expressions.
Pandas
pandas.pydata.org › docs › reference › api › pandas.Series.str.replace.html
pandas.Series.str.replace — pandas 3.0.5 documentation
Method to replace occurrences of a substring with another substring. ... Extract substrings using a regular expression. ... Find all occurrences of a pattern or regex in each string.
GeeksforGeeks
geeksforgeeks.org › python › python-substituting-patterns-in-text-using-regex
Python - Substituting patterns in text using regex - GeeksforGeeks
July 12, 2025 - # Python implementation of substituting a # specific text pattern in a string using regex # importing regex module import re # Function to perform # operations on the strings def substitutor(): # a string variable sentence1 = "It is raining outside." # replacing text 'raining' in the string # variable sentence1 with 'sunny' thus # passing first parameter as raining # second as sunny, third as the # variable name in which string is stored # and printing the modified string print(re.sub(r"raining", "sunny", sentence1)) # a string variable sentence2 = "Thank you very very much."
PythonTest
pythontest.com › python › regex-search-replace
Python regex Search and Replace Examples | PythonTest
I think the most basic form of a search/replace script in python is something like this: import fileinput import re for line in fileinput.input(): line = re.sub('foo','bar', line.rstrip()) print(line) The fileinput module takes care of the stream verses filename input handling. The re (regex, regular expression) module has sub which handles the search/replace.
Top answer 1 of 4
750
str.replace() v2|v3 does not recognize regular expressions.
To perform a substitution using a regular expression, use re.sub() v2|v3.
For example:
import re
line = re.sub(
r"(?i)^.*interfaceOpDataFile.*$",
"interfaceOpDataFile %s" % fileIn,
line
)
In a loop, it would be better to compile the regular expression first:
import re
regex = re.compile(r"^.*interfaceOpDataFile.*$", re.IGNORECASE)
for line in some_file:
line = regex.sub("interfaceOpDataFile %s" % fileIn, line)
# do something with the updated line
2 of 4
529
You are looking for the re.sub function.
import re
s = "Example String"
replaced = re.sub('[ES]', 'a', s)
print(replaced)
will print axample atring
JanBask Training
janbasktraining.com › community › python-python › python-replace-regex
python .replace() regex | JanBask Training Community
May 7, 2025 - `str.replace()` performs a direct substring match. It does not interpret patterns, special characters, or regex tokens. ... Nothing changes because `d+` is treated as a literal string, not a pattern.
PYnative
pynative.com › home › python › regex › python regex replace pattern in a string using re.sub()
Python Regex Replace Pattern in a string using re.sub()
July 19, 2021 - import re # replacement function to convert uppercase letter to lowercase def convert_to_lower(match_obj): if match_obj.group() is not None: return match_obj.group().lower() # Original String str = "Emma LOves PINEAPPLE DEssert and COCONUT Ice Cream" # pass replacement function to re.sub() res_str = re.sub(r"[A-Z]", convert_to_lower, str) # String after replacement print(res_str) # Output 'Emma loves pineapple dessert and coconut Ice Cream'Code language: Python (python) Run · We saw how to find and replace the single regex pattern in the earlier examples.
Plain English
python.plainenglish.io › the-incredible-power-of-pythons-replace-regex-6cc217643f37
The incredible power of Python’s replace regex | by Josh Weinstein | Python in Plain English
November 1, 2020 - The replacement string can be a literal replacement, such as matching [0-9]+ and replacing it with "abc" . Such an operation would convert all digit sequences in a string with the character sequence "abc" .
Python documentation
docs.python.org › 3 › howto › regex.html
Regular expression HOWTO — Python 3.14.7 documentation
If the pattern isn’t found, string is returned unchanged. The optional argument count is the maximum number of pattern occurrences to be replaced; count must be a non-negative integer.
W3Schools
w3schools.com › python › ref_string_replace.asp
Python String replace() Method
Remove List Duplicates Reverse ... Study Plan Python Interview Q&A Python Training ... The replace() method replaces a specified phrase with another specified phrase....
TechGeekBuzz
techgeekbuzz.com › blog › python-regex-replace-pattern-in-a-string-using-re-sub
Python Regex Replace Pattern in a string using re.sub()
To do this, we learned two regex methods sub() and subn() . The sub() method accept a regular expression pattern, and replace all the matched pattern of the string with the replacement string or function, and return the newly replaced string.
GeeksforGeeks
geeksforgeeks.org › python › python-regex-replace-captured-groups
Python Regex: Replace Captured Groups - GeeksforGeeks
July 23, 2025 - This article dives into one of the crucial aspects of regex in Python: Regex Groups, and demonstrates how to use `re.sub()` for group replacement with practical examples. A group in regex is a part of a pattern that is enclosed in parentheses. Groups allow us to segment a pattern into sub-patterns, making it easier to apply specific operations on each part. These groups are indexed numerically from 1 for the first group and so on. The entire match is group 0. ... Extract parts of the matched string: If we want to extract or capture a specific part of the text that matches the pattern, groups allow us to do this.
Table Convert
tableconvert.com › home › table convert
Table Convert - Free Online Table Converter and Generator
July 28, 2025 - Edit data using our advanced online table editor with professional features. Supports deleting empty rows, removing duplicates, data transposition, sorting, regex find & replace, and real-time preview.
Real Python
realpython.com › replace-string-python
How to Replace a String in Python – Real Python
October 22, 2025 - In this tutorial, you'll learn how to remove or replace a string or substring. You'll go from the basic string method .replace() all the way up to a multi-layer regex pattern using the sub() function from Python's re module.
Index.dev
index.dev › blog › regex-advanced-string-replacement-python
Python Regex Replace: How to Replace Strings Using re Module
The re.sub() function is the primary tool for performing string replacements with regex in Python. It allows you to specify a regex pattern to search for, a replacement string, and the target string where the replacement will occur.
RegExr
regexr.com
RegExr: Learn, Build, & Test RegEx
RegExr is an online tool to learn, build, & test Regular Expressions (RegEx / RegExp).
freeCodeCamp
freecodecamp.org › news › javascript-string-replace-example-with-regex
JavaScript String.Replace() Example with RegEx
October 20, 2020 - With RegEx, you can match strings at points that match specific characters (for example, JavaScript) or patterns (for example, NumberStringSymbol - 3a&). The .replace method is used on strings in JavaScript to replace parts of string with characters.