Python/strings/capitalize.py at master · CarsonHam/Python

27 lines (22 loc) · 679 Bytes

from string import ascii_lowercase, ascii_uppercase

def capitalize(sentence: str) -> str:

"""

This function will capitalize the first letter of a sentence or a word

>>> capitalize("hello world")

'Hello world'

>>> capitalize("123 hello world")

'123 hello world'

>>> capitalize(" hello world")

' hello world'

>>> capitalize("a")

'A'

>>> capitalize("")

"""

if not sentence:

return ""

lower_to_upper = {lc: uc for lc, uc in zip(ascii_lowercase, ascii_uppercase)}

return lower_to_upper.get(sentence[0], sentence[0]) + sentence[1:]

if __name__ == "__main__":

from doctest import testmod

testmod()

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