
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Question
Write a function clean in Python that when is given a string and returns the string with the leading and trailing space characters removed.
Details:
you must use while loop(s)
you must not use the strip method
the space characters are the space ' ' , newline '\n' , and tab '\t'
>>> clean(" hello ")
'hello'
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