Python String swapcase() Method

The String swapcase() method returns a new string that is the swap of the case of all the case-based characters present in the original string.

Syntax

my_string.swapcase()

swapcase() Parameters

Python String swapcase() method does not take any parameters.

swapcase() Return Value

Python String swapcase() method returns a new string in which:

• All uppercase characters are converted to lowercase
• All lowercase characters converted to uppercase characters
• Other digits and symbols are left as they are.

Examples

Example 1: Swap case a String with swapcase()

The swapcase() method returns a new string with all uppercase characters converted to lowercase and all lowercase characters converted to uppercase characters.

my_str = 'Tutorial Reference'
result = my_str.swapcase()
print(result) # Output: tUTORIAL rEFERENCE

output

tUTORIAL rEFERENCE

Example 2: Swap case a String with Symbols with swapcase()

The swapcase() method ignores numbers and special characters in a string.

my_str = '1234 AbC $@%*'
result = my_str.swapcase()
print(result) # Output: 1234 aBc $@%*

output

1234 aBc $@%*

Example 3: Swap case with non-english characters

Not necessarily the swapcase of a swapcase of a string is equal to the original string.

For example, let's see that my_str.swapcase().swapcase() == my_str is not always true:

my_str1 = "Hello"
my_str2 = "groß"

print(my_str1.swapcase()) # Output: hELLO
print(my_str2.swapcase()) # Output: GROSS

print(my_str1.swapcase()) # Output: hELLO
print(my_str2.swapcase().swapcase()) # Output: gross

print(my_str1.swapcase().swapcase() == my_str1) # Output: True
print(my_str2.swapcase().swapcase() == my_str2) # Output: False

output

hELLO
GROSS
hELLO
gross
True
False