casefold(): Convert string to lower case chars

my_str="Welcome to Plus2net Python"
print(my_str.casefold())

welcome to plus2net python

casefold() and lower() difference

my_str="aBcßeF"
print(my_str.casefold())
print(my_str.lower())

abcssef
abcßef

Use Case: Case-Insensitive String Comparison

casefold() is ideal when comparing strings in a case-insensitive manner, especially for non-English text:

str1 = "Straße"
str2 = "STRASSE"
print(str1.casefold() == str2.casefold())  # Output: True

Difference Between lower() and casefold()

casefold() is more powerful than lower() as it can handle more complex characters:

text = "aBcß"
print(text.lower())  # Output: abcß
print(text.casefold())  # Output: abcss

Use Case: Normalizing Input for Case-Insensitive Search

Use casefold() to normalize input for a search function, allowing for accurate case-insensitive searches:

search_term = "PYTHON"
content = "Learning python programming."
if search_term.casefold() in content.casefold():
    print("Search term found!")# Output: 'Search term found!'

Working with Non-English Characters

casefold() handles non-ASCII characters effectively:

text = "ßß"
print(text.casefold())  # Output: 'ss'

Case-Insensitive String Comparison Across Languages

word1 = "Τεχνολογία"
word2 = "τεχνολογία"
print(word1.casefold() == word2.casefold())  # Output: True

Subhendu Mohapatra

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