python re sub * string - Brave Search

Python Regular Expression: re.sub to replace matches

stackoverflow.com › questions › 74613853 › python-regular-expression-re-sub-to-replace-matches

The first argument to re.sub is treated as a regular expression, so the square brackets get a special meaning and don't match literally.

You don't need a regular expression for this replacement at all though (and you also don't need the loop counter i):

for name_line in name_lines:
    text = text.replace(name_line, '')

Answer from Thomas on Stack Overflow

Python documentation

docs.python.org › 3 › library › re.html

re — Regular expression operations — Python 3.14.3 ...

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-bit strings (bytes). However, Unicode strings and 8-bit strings cannot be mixed: that is, you cannot match a Unicode string with a bytes pattern or vice-versa; similarly, when asking for a substitution, the replacement string must be of the same type as both the pattern and the search string.

geeksforgeeks.org › python › re-sub-python-regex

re.sub() - Python RegEx - GeeksforGeeks

July 23, 2025 - If regular expression has capture groups(defined by parentheses()), we can use the groups in the replacement string using \1,\3,etc., or by using replacement function. ... import re a = "John 25, Jane 30, Jack 22" # Match name and age pattern = r"(\w+) (\d+)" # Use age first, then name repl = r"\2 years old, \1" # Swap names and ages result = re.sub(pattern, repl, a) print(result)

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Python Tutorial

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Python Regex sub() Function

December 10, 2021 - import re s = 'Make the World a *Better Place*' pattern = r'\*(.*?)\*' replacement = r'<b>\1<\\b>' html = re.sub(pattern, replacement, s) print(html)Code language: Python (python) ... In this example, the pattern r'\*(.*?)\*' find the text that begins and ends with the asterisk (*). It has a capturing group that captures the text between asterisks (*). The replacement is a regular expression with a backreference. The backreference \1 refers to the first group in the pattern, which is the text between the asterisks (*). Suppose you have a list of strings where each element contain both alphabet and number:

note.nkmk.me › home › python

Replace Strings in Python: replace(), translate(), and Regex | note.nkmk.me

May 4, 2025 - Although Python does not have a built-in method to replace substrings at specific positions, you can achieve this by splitting the string with slicing and concatenating the parts with the replacement string.

educative.io › answers › what-is-the-resub-function-in-python

What is the re.sub() function in Python?

Python uses the re.sub() function to replace text that matches a regular expression pattern with a new value in a string.

lzone.de › examples › Python re.sub

Python re.sub Examples

result = re.sub('abc', '', input) # Delete pattern abc result = re.sub('abc', 'def', input) # Replace pattern abc -> def result = re.sub(r'\s+', ' ', input) # Eliminate duplicate whitespaces using wildcards result = re.sub('abc(def)ghi', r'\1', input) # Replace a string with a part of itself

codecademy.com › docs › python › regular expressions › re.sub()

Python | Regular Expressions | re.sub() | Codecademy

October 14, 2024 - The re.sub() function replaces matching substrings with a new string for all occurrences, or a specified number. ... Looking for an introduction to the theory behind programming? Master Python while learning data structures, algorithms, and more!

stackoverflow.com › questions › 74613853 › python-regular-expression-re-sub-to-replace-matches

regex - Python Regular Expression: re.sub to replace matches - Stack Overflow

The first argument to re.sub is treated as a regular expression, so the square brackets get a special meaning and don't match literally.

You don't need a regular expression for this replacement at all though (and you also don't need the loop counter i):

for name_line in name_lines:
    text = text.replace(name_line, '')

Try to use re.sub to replace the match:

import re

text = """\
Questions and Answers
Operator [1]

Shannon Siemsen Cross, Cross Research LLC - Co-Founder, Principal & Analyst [2]
I hope everyone is well. Tim, you talked about seeing some improvement in the second half of April. So I was wondering if you could just talk maybe a bit more on the segment and geographic basis what you're seeing in the various regions that you're selling in and what you're hearing from your customers. And then I have a follow-up.
Timothy D. Cook, Apple Inc. - CEO & Director [3]"""

text = re.sub(r".*\d]", "", text)
print(text)

Prints:

Questions and Answers



I hope everyone is well. Tim, you talked about seeing some improvement in the second half of April. So I was wondering if you could just talk maybe a bit more on the segment and geographic basis what you're seeing in the various regions that you're selling in and what you're hearing from your customers. And then I have a follow-up.

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Python Examples

pythonexamples.org › python-re-sub

Python re.sub() - Replace using Regular Expression

Original string Account Number - 12345, Amount - 586.32 After replacement Account Number - NN, Amount - NN.NN · We can limit the maximum number of replacements by re.sub() function by specifying count optional argument.

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Python Regex Replace Pattern in a string using re.sub()

July 19, 2021 - import re target_str = "Jessa knows testing and machine learning" res_str = re.sub(r"\s", "_", target_str) # String after replacement print(res_str) # Output 'Jessa_knows_testing_and_machine_learning'Code language: Python (python) Run

stackoverflow.com › questions › 25384333 › python-re-sub-replace-substring-with-string

regex - python re.sub : replace substring with string - Stack Overflow

You mean this?

>>> import re
>>> m = re.sub(r'10', r'20', "hello number 10, Agosto 19")
>>> m
'hello number 20, Agosto 19'

OR

Using lookbehind,

>>> number = "20"
>>> number
'20'
>>> m = re.sub(r'(?<=number )\d+', number, "hello number 10, Agosto 19")
>>> m
'hello number 20, Agosto 19'

Do not use regex for such simple cases. Normal string manipulation is enough (and fast):

s = "hello number 10, Agosto 19"
s = s.replace('10', '20')

flexiple.com › python › python-regex-replace

Python regex: How to search and replace strings | Flexiple - Flexiple

re.sub(pattern, replacement, string, count=0, flags=0) First of all, let us understand what all these parameters mean: pattern: The regular expression you want to search and find inside the given string in Python. replacement: The string to replace the matched pattern.

discuss.python.org › python help

Replacement argument in re.sub() - Python Help - Discussions on Python.org

November 10, 2022 - Hello, I have the following strings that I would like to match and replace. I am able to match the strings but struggling to carry out a replacement - the output either doesn’t change or it completely erases sections of the input string. i have included an example of one of many options I have tried. scenario 1: input string: (BXXADDB)(BXXXCAC1)(CXX2A)CANEVER desired output string: (BXXADDB)(BXXXCAC1)(CXX2A)*CANEVER pattern = r"^\([A-Za-z0-9]+\)\([A-Za-z0-9]+\)\([^)]*\)[a-zA-Z]+$" replaceme...

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Python Strings Slicing Strings Modify Strings Concatenate Strings Format Strings Escape Characters String Methods String Exercises Code Challenge Python Booleans ... Python Operators Arithmetic Operators Assignment Operators Comparison Operators Logical Operators Identity Operators Membership Operators Bitwise Operators Operator Precedence Code Challenge Python Lists · Python Lists Access List Items Change List Items Add List Items Remove List Items Loop Lists List Comprehension Sort Lists Copy Lists Join Lists List Methods List Exercises Code Challenge Python Tuples

stackoverflow.com › questions › 24915396 › is-there-a-way-to-use-regular-expressions-in-the-replacement-string-in-re-sub

regex - Is there a way to use regular expressions in the replacement string in re.sub() in Python? - Stack Overflow

Place \d+ in a capture group (...) and then use \1 to refer to it:

>>> import re
>>> re.sub('[a-z]*(\d+)', r'lion\1', 'zebra432')
'lion432'
>>>
>>> # You can also refer to more than one capture group
>>> re.sub('([a-z]*)(\d+)', r'\1lion\2', 'zebra432')
'zebralion432'
>>>

From the docs:

Backreferences, such as \6, are replaced with the substring matched by group 6 in the pattern.

Note that you will also need to use a raw-string so that \1 is not treated as an escape sequence.

builtin.com › articles › python-re-match

Python re.match() and re.sub() Explained | Built In

Since the string starts with "Price123", it successfully matches and prints it. More on PythonPython Set Difference: A Complete Guide · The re.sub() function is used for substituting occurrences of a pattern in a string.

geeksforgeeks.org › python › python-substituting-patterns-in-text-using-regex

Python - Substituting patterns in text using regex - GeeksforGeeks

July 12, 2025 - It is used for substituting a specific pattern in the string. There are in total 5 arguments of this function. Syntax: re.sub(pattern, repl, string, count=0, flags=0) Parameters: pattern - the pattern which is to be searched and substituted ...

docs.python.org › 3.1 › library › re.html

7.2. re — Regular expression operations — Python v3.1.5 documentation

For example, if the pattern is (?P<id>[a-zA-Z_]\w*), the group can be referenced by its name in arguments to methods of match objects, such as m.group('id') or m.end('id'), and also by name in the regular expression itself (using (?P=id)) and replacement text given to .sub() (using \g<id>). ... Matches whatever text was matched by the earlier group named name. ... A comment; the contents of the parentheses are simply ignored. ... Matches if ... matches next, but doesn’t consume any of the string.

Python documentation

docs.python.org › 3 › howto › regex.html

Regular Expression HOWTO — Python 3.14.3 documentation

Backreferences like this aren’t often useful for just searching through a string — there are few text formats which repeat data in this way — but you’ll soon find out that they’re very useful when performing string substitutions.