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Python - Modify Strings

Python has a set of built-in methods that you can use on strings.

Upper Case


The upper() method returns the string in upper case:

a = "Hello, World!"
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Lower Case


The lower() method returns the string in lower case:

a = "Hello, World!"
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Remove Whitespace

Whitespace is the space before and/or after the actual text, and very often you want to remove this space.


The strip() method removes any whitespace from the beginning or the end:

a = " Hello, World! "
print(a.strip()) # returns "Hello, World!"
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Replace String


The replace() method replaces a string with another string:

a = "Hello, World!"
print(a.replace("H", "J"))
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Split String

The split() method returns a list where the text between the specified separator becomes the list items.


The split() method splits the string into substrings if it finds instances of the separator:

a = "Hello, World!"
print(a.split(",")) # returns ['Hello', ' World!']
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Learn more about Lists in our Python Lists chapter.

String Methods

Learn more about String Methods with our String Methods Reference