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* Added test cases to join.py * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci --------- Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
55 lines
1.3 KiB
Python
55 lines
1.3 KiB
Python
"""
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Program to join a list of strings with a separator
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"""
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def join(separator: str, separated: list[str]) -> str:
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"""
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Joins a list of strings using a separator
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and returns the result.
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:param separator: Separator to be used
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for joining the strings.
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:param separated: List of strings to be joined.
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:return: Joined string with the specified separator.
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Examples:
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>>> join("", ["a", "b", "c", "d"])
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'abcd'
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>>> join("#", ["a", "b", "c", "d"])
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'a#b#c#d'
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>>> join("#", "a")
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'a'
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>>> join(" ", ["You", "are", "amazing!"])
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'You are amazing!'
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This example should raise an
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exception for non-string elements:
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>>> join("#", ["a", "b", "c", 1])
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Traceback (most recent call last):
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...
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Exception: join() accepts only strings
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Additional test case with a different separator:
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>>> join("-", ["apple", "banana", "cherry"])
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'apple-banana-cherry'
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"""
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joined = ""
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for word_or_phrase in separated:
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if not isinstance(word_or_phrase, str):
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raise Exception("join() accepts only strings")
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joined += word_or_phrase + separator
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# Remove the trailing separator
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# by stripping it from the result
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return joined.strip(separator)
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if __name__ == "__main__":
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from doctest import testmod
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testmod()
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