Python/strings/join.py
Saurabh Mahapatra 00165a5fb2
Added test cases to join.py ()
* 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>
2023-10-17 02:36:12 -04:00

55 lines
1.3 KiB
Python

"""
Program to join a list of strings with a separator
"""
def join(separator: str, separated: list[str]) -> str:
"""
Joins a list of strings using a separator
and returns the result.
:param separator: Separator to be used
for joining the strings.
:param separated: List of strings to be joined.
:return: Joined string with the specified separator.
Examples:
>>> join("", ["a", "b", "c", "d"])
'abcd'
>>> join("#", ["a", "b", "c", "d"])
'a#b#c#d'
>>> join("#", "a")
'a'
>>> join(" ", ["You", "are", "amazing!"])
'You are amazing!'
This example should raise an
exception for non-string elements:
>>> join("#", ["a", "b", "c", 1])
Traceback (most recent call last):
...
Exception: join() accepts only strings
Additional test case with a different separator:
>>> join("-", ["apple", "banana", "cherry"])
'apple-banana-cherry'
"""
joined = ""
for word_or_phrase in separated:
if not isinstance(word_or_phrase, str):
raise Exception("join() accepts only strings")
joined += word_or_phrase + separator
# Remove the trailing separator
# by stripping it from the result
return joined.strip(separator)
if __name__ == "__main__":
from doctest import testmod
testmod()