Python:
Перетворення рядка у нижній регістр
How to: (Як це зробити:)
# Перетворення рядка у нижній регістр
text = "Привіт, Як справи?"
lower_text = text.lower()
print(lower_text) # виведе: привіт, як справи?Ще приклад, коли порівнюємо рядки:
# Порівняння рядків без урахування регістра
user_input = "Київ"
city = "київ"
print(user_input.lower() == city.lower()) # виведе: TrueDeep Dive (Поглиблений розбір)
Python’s str.lower() method dates back to the early versions of Python. It allows strings to be converted to a lower case, which is especially useful because case sensitivity can lead to issues during string comparisons. This feature is not unique to Python: most programming languages offer similar functionality.
Alternatives include using regular expressions or manual mapping of characters to their lower-case equivalents, but these methods are more verbose and error-prone.
Under the hood, str.lower() works by iterating over each character in the string and mapping it to its lower-case equivalent based on Unicode standard. This means it can correctly handle most languages, including complex cases like German’s ß, which becomes ‘ss’.
See Also (Дивіться також)
- The official Python documentation on string methods: https://docs.python.org/3/library/stdtypes.html#string-methods
- Unicode Standard for characters: https://home.unicode.org/
- Python PEP regarding string methods and Unicode: https://www.python.org/dev/peps/pep-3137/