Python: Find a string which, when each character is shifted (ASCII incremented) by shift

Last update on May 28 2022 13:41:43 (UTC/GMT +8 hours)

Python Programming Puzzles: Exercise-67 with Solution

Write a Python program to find a string which, when each character is shifted (ASCII incremented) by shift, gives the result.

ASCII table -

Input:
Ascii character table
Shift = 1
Output:
@rbhhbg`q`bsdqs`akd

Input:
Ascii character table
Shift = -1
Output:
Btdjj!dibsbdufs!ubcmf

Sample Solution-1:

Python Code:

#License: https://bit.ly/3oLErEI

def test(strs,shift):
    return "".join(chr(ord(c) - shift) for c in strs)
 
strs = "Ascii character table"
print("Original string:")
print(strs)
shift = 1
print('Shift =',shift)
print("A new string which, when each character is shifted (ASCII incremented) by shift in the said string:")
print(test(strs, shift))
strs = "Ascii character table"
print("\nOriginal string:")
print(strs)
shift = -1
print('Shift =',shift)
print("A new string which, when each character is shifted (ASCII incremented) by shift in the said string:")
print(test(strs, shift))

Sample Output:

Original string:
Ascii character table
Shift = 1
A new string which, when each character is shifted (ASCII incremented) by shift in the said string:
@rbhhbg`q`bsdqs`akd

Original string:
Ascii character table
Shift = -1
A new string which, when each character is shifted (ASCII incremented) by shift in the said string:
Btdjj!dibsbdufs!ubcmf

Flowchart:

Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:

Sample Solution-2:

Python Code:

#License: https://bit.ly/3oLErEI

def test(strs,shift):
    return "".join(chr(ord(strs[i]) - shift) for i in range(len(strs)))
 
strs = "Ascii character table"
print("Original string:")
print(strs)
shift = 1
print('Shift =',shift)
print("A new string which, when each character is shifted (ASCII incremented) by shift in the said string:")
print(test(strs, shift))
strs = "Ascii character table"
print("\nOriginal string:")
print(strs)
shift = -1
print('Shift =',shift)
print("A new string which, when each character is shifted (ASCII incremented) by shift in the said string:")
print(test(strs, shift))

Sample Output:

Original string:
Ascii character table
Shift = 1
A new string which, when each character is shifted (ASCII incremented) by shift in the said string:
@rbhhbg`q`bsdqs`akd

Original string:
Ascii character table
Shift = -1
A new string which, when each character is shifted (ASCII incremented) by shift in the said string:
Btdjj!dibsbdufs!ubcmf

Flowchart:

Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:

Python Code Editor :

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Python: Tips of the Day

Find current directory and file's directory:

To get the full path to the directory a Python file is contained in, write this in that file:

import os dir_path = os.path.dirname(os.path.realpath(__file__))

(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)

To get the current working directory use

import os cwd = os.getcwd()

Documentation references for the modules, constants and functions used above:

The os and os.path modules.

The __file__ constant

os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")

os.path.dirname(path) (returns "the directory name of pathname path")

os.getcwd() (returns "a string representing the current working directory")

os.chdir(path) ("change the current working directory to path")

Ref: https://bit.ly/3fy0R6m