Replace first occurrence of string in Python

PythonRegex

Python Problem Overview

I have some sample string. How can I replace first occurrence of this string in a longer string with empty string?

regex = re.compile('text')
match = regex.match(url)
if match:
    url = url.replace(regex, '')

Python Solutions

Solution 1 - Python

string replace() function perfectly solves this problem:

> string.replace(s, old, new[, maxreplace]) > > Return a copy of string s with all occurrences of substring old replaced by new. If the optional argument maxreplace is given, the first maxreplace occurrences are replaced.

>>> u'longlongTESTstringTEST'.replace('TEST', '?', 1)
u'longlong?stringTEST'

Solution 2 - Python

Use re.sub directly, this allows you to specify a count:

regex.sub('', url, 1)

(Note that the order of arguments is replacement, original not the opposite, as might be suspected.)

Categories
Recommended Python Solutions
Recommended Regex Solutions

Previous Solution:

How do I instantiate a Queue object in java?

JavaData StructuresQueue

Next Solution:

How do I create a link using javascript?

JavascriptJqueryHtmlDomHyperlink

Attributions

All content for this solution is sourced from the original question on Stackoverflow.

The content on this page is licensed under the Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) license.

Content TypeOriginal AuthorOriginal Content on Stackoverflow
Questionmarks34View Question on Stackoverflow
Solution 1 - PythonvirhiloView Answer on Stackoverflow
Solution 2 - PythonKonrad RudolphView Answer on Stackoverflow