Python: Reverse the case of all strings. For those strings, which contain no letters, reverse the strings
Python Programming Puzzles: Exercise-52 with Solution
Write a Python program to reverse the case of all strings. For those strings, which contain no letters, reverse the strings.
Input: ['cat', 'catatatatctsa', 'abcdefhijklmnop', '124259239185125', '', 'foo', 'unique'] Output: ['CAT', 'CATATATATCTSA', 'ABCDEFHIJKLMNOP', '521581932952421', '', 'FOO', 'UNIQUE'] Input: ['Green', 'Red', 'Orange', 'Yellow', '', 'White'] Output: ['gREEN', 'rED', 'oRANGE', 'yELLOW', '', 'wHITE'] Input: ['Hello', '!@#', '!@#$', '123#@!'] Output: ['hELLO', '!@#', '!@#$', '123#@!']
Visual Presentation:
Sample Solution:
Python Code:
# Define a function named 'test' that takes a list of strings as input and returns a modified list
def test(strs: list[str]) -> list[str]:
# Use a list comprehension to create a new list with modified strings
# If a string contains any alphabetic characters, reverse its case; otherwise, reverse the string
return [s.swapcase() if any(c.isalpha() for c in s) else s[::-1] for s in strs]
# Create a list of strings named 'strs'
strs = ['cat', 'catatatatctsa', 'abcdefhijklmnop', '124259239185125', '', 'foo', 'unique']
# Print a message indicating the task and the original list
print("Original list:")
# Print the original list of strings
print(strs)
# Print a message indicating the task and the result of the test function applied to 'strs'
print("Reverse the case of all strings. For those strings which contain no letters, reverse the strings:")
# Print the result of the test function applied to 'strs'
print(test(strs))
# Create another list of strings named 'strs'
strs = ['Green', 'Red', 'Orange', 'Yellow', '', 'White']
# Print a message indicating the task and the original list
print("\nOriginal list:")
# Print the original list of strings
print(strs)
# Print a message indicating the task and the result of the test function applied to 'strs'
print("Reverse the case of all strings. For those strings which contain no letters, reverse the strings:")
# Print the result of the test function applied to 'strs'
print(test(strs))
# Create yet another list of strings named 'strs'
strs = ["Hello", "!@#", "!@#$", "123#@!"]
# Print a message indicating the task and the original list
print("\nOriginal list:")
# Print the original list of strings
print(strs)
# Print a message indicating the task and the result of the test function applied to 'strs'
print("Reverse the case of all strings. For those strings which contain no letters, reverse the strings:")
# Print the result of the test function applied to 'strs'
print(test(strs))
Sample Output:
Original list: ['cat', 'catatatatctsa', 'abcdefhijklmnop', '124259239185125', '', 'foo', 'unique'] Reverse the case of all strings. For those strings which contain no letters, reverse the strings: ['CAT', 'CATATATATCTSA', 'ABCDEFHIJKLMNOP', '521581932952421', '', 'FOO', 'UNIQUE'] Original list: ['Green', 'Red', 'Orange', 'Yellow', '', 'White'] Reverse the case of all strings. For those strings which contain no letters, reverse the strings: ['gREEN', 'rED', 'oRANGE', 'yELLOW', '', 'wHITE'] Original list: ['Hello', '!@#', '!@#$', '123#@!'] Reverse the case of all strings. For those strings which contain no letters, reverse the strings: ['hELLO', '#@!', '$#@!', '!@#321']
Flowchart:
Python Code Editor :
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