Python/strings/capitalize.py
Du Yuanchao 4d0a8f2355
Optimized recursive_bubble_sort (#2410)
* optimized recursive_bubble_sort

* Fixed doctest error due whitespace

* reduce loop times for optimization

* fixup! Format Python code with psf/black push

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
2020-09-10 10:31:26 +02:00

28 lines
679 B
Python

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()