Python string Method - casefold()

The casefold() method in Python strings returns a copy of the string with all the characters converted to lowercase. This method is similar to the lower() method, but it also converts any special characters to their lowercase equivalent.

The syntax for the casefold() method is as follows:

string.casefold()

Here, string is the string that we want to convert to lowercase.

Example:

# Defining a string with special characters
my_string = "Äpfel, Öl und Übergröße!"

# Using the casefold() method
result_string = my_string.casefold()

print(result_string)   # Output: "äpfel, öl und übergröße!"

In the above example, the casefold() method is used to convert all the characters in the string my_string to lowercase. Since the string contains special characters like 'Ä', 'Ö', and 'Ü', the method converts them to their lowercase equivalent 'ä', 'ö', and 'ü'. The resulting string is stored in result_string and printed using the print() function. Note that the original string my_string is not modified by the casefold() method, since strings in Python are immutable.