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Added swap case program and removed unexpected expression part (#3212)

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* Removed an extra '=' which was creating an error while running a program.

* Removed the unexpected expression part.

* Added program for swap cases in string folder

* removed if condition and exchange word with char

* added '=' sign which I removed before because of unknowing error from pycharm

* added space in test

* removed costraint from problem statement

* Update cocktail_shaker_sort.py

* Update naive_string_search.py

* Update swap_case.py

* psf/black " not '

* added new line at the end of the file

* Fix flake8 issues

* added new line at the end of the file

* added True and fixed comment

* python file end with \n

* Update swap_case.py

* Update strings/swap_case.py

* Update strings/swap_case.py

* Apply suggestions from code review

* Update strings/swap_case.py

* Update swap_case.py

* Update swap_case.py

Co-authored-by: Christian Clauss <cclauss@me.com>
This commit is contained in:
Mayur Pardeshi 2020-10-15 03:49:00 +05:30 committed by GitHub
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commit ed30749943
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strings/swap_case.py Normal file
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"""
This algorithm helps you to swap cases.
User will give input and then program will perform swap cases.
In other words, convert all lowercase letters to uppercase letters and vice versa.
For example:
1. Please input sentence: Algorithm.Python@89
aLGORITHM.pYTHON@89
2. Please input sentence: github.com/mayur200
GITHUB.COM/MAYUR200
"""
import re
# This re.compile() function saves the pattern from 'a' to 'z' and 'A' to 'Z'
# into 'regexp' variable
regexp = re.compile("[^a-zA-Z]+")
def swap_case(sentence):
"""
This function will convert all lowercase letters to uppercase letters
and vice versa.
>>> swap_case('Algorithm.Python@89')
'aLGORITHM.pYTHON@89'
"""
new_string = ""
for char in sentence:
if char.isupper():
new_string += char.lower()
if char.islower():
new_string += char.upper()
if regexp.search(char):
new_string += char
return new_string
if __name__ == "__main__":
print(swap_case(input("Please input sentence:")))