Python: Check the n^th-1 string is a proper substring of n^th string of a given list of strings

Python Programming Puzzles: Exercise-5 with Solution

Write a Python program to check the n^th-1 string is a proper substring of n^th string in a given list of strings.

Input:
['a', 'abb', 'sfs', 'oo', 'de', 'sfde']
Output:
True

Input:
['a', 'abb', 'sfs', 'oo', 'ee', 'sfde']
Output:
False

Input:
['a', 'abb', 'sad', 'ooaaesdfe', 'sfsdfde', 'sfsd', 'sfsdf', 'qwrew']
Output:
False

Input:
['a', 'abb', 'sad', 'ooaaesdfe', 'sfsdfde', 'sfsd', 'sfsdf', 'qwsfsdfrew']
Output:
True

Pictorial Presentation:

Sample Solution:

Python Code:

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

def test(str1):
    return str1[len(str1)-2] in str1[len(str1)-1] and str1[len(str1)-2] != str1[len(str1)-1]

str11 = ["a","abb","sfs", "oo", "de", "sfde"]
print("Original list:")
print(str11)
print("Check the nth-1 string is a proper substring of nth string of the said list of strings:")
print(test(str11))
str11 = ["a","abb","sfs", "oo", "ee", "sfde"]
print("\nOriginal list:")
print(str11)
print("Check the nth-1 string is a proper substring of nth string of the said list of strings:")
print(test(str11))
str11 = ["a","abb","sad", "ooaa" "esdfe", "sfsdfde", "sfsd", "sfsdf", "qwrew"]
print("\nOriginal list:")
print(str11)
print("Check the nth-1 string is a proper substring of nth string of the said list of strings:")
print(test(str11)) 
str11 = ["a","abb","sad", "ooaa" "esdfe", "sfsdfde", "sfsd", "sfsdf", "qwsfsdfrew"]
print("\nOriginal list:")
print(str11)
print("Check the nth-1 string is a proper substring of nth string of the said list of strings:")
print(test(str11))

Sample Output:

Original list:
['a', 'abb', 'sfs', 'oo', 'de', 'sfde']
Check the nth-1 string is a proper substring of nth string of the said list of strings:
True

Original list:
['a', 'abb', 'sfs', 'oo', 'ee', 'sfde']
Check the nth-1 string is a proper substring of nth string of the said list of strings:
False

Original list:
['a', 'abb', 'sad', 'ooaaesdfe', 'sfsdfde', 'sfsd', 'sfsdf', 'qwrew']
Check the nth-1 string is a proper substring of nth string of the said list of strings:
False

Original list:
['a', 'abb', 'sad', 'ooaaesdfe', 'sfsdfde', 'sfsd', 'sfsdf', 'qwsfsdfrew']
Check the nth-1 string is a proper substring of nth string of the said list of strings:
True

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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