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ade2837e41
* Update capitalize.py * Update strings/capitalize.py --------- Co-authored-by: Tianyi Zheng <tianyizheng02@gmail.com>
33 lines
856 B
Python
33 lines
856 B
Python
from string import ascii_lowercase, ascii_uppercase
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def capitalize(sentence: str) -> str:
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"""
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Capitalizes the first letter of a sentence or word.
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>>> capitalize("hello world")
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'Hello world'
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>>> capitalize("123 hello world")
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'123 hello world'
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>>> capitalize(" hello world")
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' hello world'
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>>> capitalize("a")
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'A'
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>>> capitalize("")
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''
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"""
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if not sentence:
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return ""
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# Create a dictionary that maps lowercase letters to uppercase letters
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# Capitalize the first character if it's a lowercase letter
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# Concatenate the capitalized character with the rest of the string
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lower_to_upper = dict(zip(ascii_lowercase, ascii_uppercase))
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return lower_to_upper.get(sentence[0], sentence[0]) + sentence[1:]
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if __name__ == "__main__":
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from doctest import testmod
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testmod()
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