Python Casefold() method returns a lowercase copy of the string. It is more simillar to lowercase method except it revomes all case distinctions present in the string.
For example in German, ‘β’ is equivelent to “ss”. Since it is already in lowercase, lowercase do nothing and prints ‘β’ whereas casefold converts it to “ss”.
Python String casefold() Method Syntax
It has the following syntax:
casefold() Parameters
No parameter is required.
Return Type
It returns lowercase string.
Python Version
This function was introduced in Python 3.3.
Different Examples for Python Sring casefold() Function
Here, we are going to take some examples to demonstrate the working of string casefold() function in Python.
Python String Casefold() Method Example 1
Let us take an example to illustrate the string casefold() function in Python.
# Python casefold() function example
# Variable declaration
str = "PYTHONAPP"
# Calling function
str2 = str.casefold()
# Displaying result
print("Old value:", str)
print("New value:", str2)Output:
Old value: PYTHONAPP
New value: pythonapp
Python String Casefold() Method Example 2
The strength of casefold, it not only converts into lowercase but also converts strictly. See an example below ‘β’ is converted into “ss”.
# Python casefold() function example
# Variable declaration
str = "PYTHONAPP - β"
# Calling function
str2 = str.casefold()
# Displaying result
print("Old value:", str)
print("New value:", str2)Output:
Old value: PYTHONAPP - β
New value: pythonapp ? ss
Python String Casefold() Method Example 3
If string is in camelcase, it still converts whole string into lowercase.
# Python casefold() function example
# Variable declaration
str = "PyThOnApP"
# Calling function
str2 = str.casefold()
# Displaying result
print("Old value:", str)
print("New value:", str2)Output:
Old value: PyThOnApP
New value: pythonapp
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