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# Right to Left

Quiz>

"For centuries, left-handers have suffered unfair discrimination in a world designed for right-handers."

Santrock, John W. (2008). Motor, Sensory, and Perceptual Development.

"Most humans (say 70 percent to 95 percent) are right-handed,

a minority (say 5 percent to 30 percent) are left-anded,

and an indeterminate number of people are probably best described as ambidextrous."

Scientific American. www.scientificamerican.com

One of the robots is charged with a simple task: to join a sequence of strings into one sentence to produce

instructions on how to get around the ship. But this robot is left-handed and has a tendency to joke around and confuse its right-handed friends.

You are given a sequence of strings.

You should join these strings into a chunk of text where the initial strings are separated by commas.

As a joke on the right handed robots, you should replace all cases of the words "right" with the word "left",

even if it's a part of another word. All strings are given in lowercase.

Input:

A sequence of strings.

Output:

The text as a comma-separated string.

Example:

``````left_join(("left", "right", "left", "stop")) == "left,left,left,stop"
left_join(("bright aright", "ok")) == "bleft aleft,ok"
left_join(("brightness wright",)) == "bleftness wleft"
left_join(("enough", "jokes")) == "enough,jokes"``````

How it is used:

This is a simple example of operations using strings and sequences.

Precondition:

0 < len(phrases) < 42

``````def left_join(phrases: tuple) -> str:
"""
Join strings and replace "right" to "left"
"""
return "left"

if __name__ == '__main__':
print('Example:')
print(left_join(("left", "right", "left", "stop")))

#These "asserts" using only for self-checking and not necessary for auto-testing
assert left_join(("left", "right", "left", "stop")) == "left,left,left,stop", "All to left"
assert left_join(("bright aright", "ok")) == "bleft aleft,ok", "Bright Left"
assert left_join(("brightness wright",)) == "bleftness wleft", "One phrase"
assert left_join(("enough", "jokes")) == "enough,jokes", "Nothing to replace"
print("Coding complete? Click 'Check' to review your tests and earn cool rewards!")``````

Solve>

1. , 를 구분자로 모두 join 하여 문자를 변경한다.

replace()는 문자열 변경 메소드이다.

``````def left_join(phrases):
return (','.join(phrases)).replace('right', 'left')``````

Code>

``````def left_join(phrases):
return (','.join(phrases)).replace('right', 'left')``````

Example>

``````if __name__ == '__main__':
print('Example:')
print(left_join(("left", "right", "left", "stop")))

# These "asserts" using only for self-checking and not necessary for auto-testing
assert left_join(("left", "right", "left", "stop")
) == "left,left,left,stop", "All to left"
assert left_join(("bright aright", "ok")
) == "bleft aleft,ok", "Bright Left"
assert left_join(("brightness wright",)) == "bleftness wleft", "One phrase"
assert left_join(("enough", "jokes")
) == "enough,jokes", "Nothing to replace"
print("Coding complete? Click 'Check' to review your tests and earn cool rewards!")``````

Result>

Example:

left,left,left,stop

Coding complete? Click 'Check' to review your tests and earn cool rewards!

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