Python: Find two indices making a given string unhappy
Python Programming Puzzles: Exercise-83 with Solution
A string is happy if every three consecutive characters are distinct. Write a Python program to find two indices making a given string unhappy.
Input: Python Output: None Input: Unhappy Output: [4, 5] Input: Find Output: None Input: Street Output: [3, 4]
Pictorial Presentation:
Sample Solution:
Python Code:
#License: https://bit.ly/3oLErEI
def test(s):
for i in range(len(s) - 2):
if s[i] == s[i + 1]:
return [i, i + 1]
if s[i] == s[i + 2]:
return [i, i + 2]
strs = "Python"
print("Original string:",strs)
print("Find two indices making the said string unhappy!")
print(test(strs))
strs = "Unhappy"
print("\nOriginal string:",strs)
print("Find two indices making the said string unhappy!")
print(test(strs))
strs = "Find"
print("\nOriginal string:",strs)
print("Find two indices making the said string unhappy!")
print(test(strs))
strs = "Street"
print("\nOriginal string:",strs)
print("Find two indices making the said string unhappy!")
print(test(strs))
Sample Output:
Original string: Python Find two indices making the said string unhappy! None Original string: Unhappy Find two indices making the said string unhappy! [4, 5] Original string: Find Find two indices making the said string unhappy! None Original string: Street Find two indices making the said string unhappy! [3, 4]
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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
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