How to Remove a Substring from a String in Python
This tutorial explains how to delete a substring in a string in Python. It will show you that strings cannot just be deleted, but only replaced. This tutorial also lists some sample codes to clarify the concepts, as the method has changed compared to previous Python versions.
str.replace()Replace substring from String using method in Python 3.x
Strings have many built-in methods. In fact, strings are immutable in Python. You can str.replace()create a new string using the replace method. str.replace(oldvalue, newvalue, count)Returns a copy of the string with the replaced oldvalueby newvalue. counttells how many times the replacement should be performed.
list_str = {"Abc.ex", "Bcd.ex", "cde.ex", "def.jpg", "efg.jpg"}
new_set = {x.replace(".ex", "").replace(".jpg", "") for x in list_str}
print(new_set)
Output:
{'Bcd', 'Abc', 'cde', 'def', 'efg'}
string.replace()Use the method to replace a substring in a string in Python 2.x
If you are using Python 2.x, you can use string.replace()the replace method to replace a substring. This method takes old value, , new valueand countas arguments. new valueis what replace old valuerequires and countis a number specifying the number of occurrences of the old value you want to replace. The default value is all occurrences.
The sample code for this method is as follows.
text = "Hello World!"
x = text.replace("l", "k", 1)
print(x)
Output:
Heklo World!
str.removesuffix()Remove the suffix from the string using
If you are using Python 3.9, you can str.removesuffix('suffix')remove the suffix using .
If the string ends with the suffix string, and the suffix is non-empty, the string is returned with the suffix removed. Otherwise, the original string is returned.
A basic example of is given below str.removesuffix().
text = "Quickly"
print(text.removesuffix("ly"))
print(text.removesuffix("World"))
Output:
Quick
Quickly
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