Python: Find all lower and upper mixed case combinations of a given string

Last update on April 22 2025 12:51:10 (UTC/GMT +8 hours)

41. Mixed Case Combinations

Write a Python program to find all lower and upper mixed case combinations of a given string.

Sample Solution:

Python Code:

import itertools
def combination(str1):
    result = map(''.join, itertools.product(*((c.lower(), c.upper()) for c in str1)))
    return list(result)
st ="abc"
print("Original string:")
print(st)
print("All lower and upper mixed case combinations of the said string:")
print(combination(st))
st ="w3r"
print("\nOriginal string:")
print(st)
print("All lower and upper mixed case combinations of the said string:")
print(combination(st))
st ="Python"
print("\nOriginal string:")
print(st)
print("All lower and upper mixed case combinations of the said string:")
print(combination(st))

Sample Output:

Original string:
abc
All lower and upper mixed case combinations of the said string:
['abc', 'abC', 'aBc', 'aBC', 'Abc', 'AbC', 'ABc', 'ABC']

Original string:
w3r
All lower and upper mixed case combinations of the said string:
['w3r', 'w3R', 'w3r', 'w3R', 'W3r', 'W3R', 'W3r', 'W3R']

Original string:
Python
All lower and upper mixed case combinations of the said string:
['python', 'pythoN', 'pythOn', 'pythON', 'pytHon', 'pytHoN', 'pytHOn', 'pytHON', 'pyThon', 'pyThoN', 'pyThOn', 'pyThON', 'pyTHon', 'pyTHoN', 'pyTHOn', 'pyTHON', 'pYthon', 'pYthoN', 'pYthOn', 'pYthON', 'pYtHon', 'pYtHoN', 'pYtHOn', 'pYtHON', 'pYThon', 'pYThoN', 'pYThOn', 'pYThON', 'pYTHon', 'pYTHoN', 'pYTHOn', 'pYTHON', 'Python', 'PythoN', 'PythOn', 'PythON', 'PytHon', 'PytHoN', 'PytHOn', 'PytHON', 'PyThon', 'PyThoN', 'PyThOn', 'PyThON', 'PyTHon', 'PyTHoN', 'PyTHOn', 'PyTHON', 'PYthon', 'PYthoN', 'PYthOn', 'PYthON', 'PYtHon', 'PYtHoN', 'PYtHOn', 'PYtHON', 'PYThon', 'PYThoN', 'PYThOn', 'PYThON', 'PYTHon', 'PYTHoN', 'PYTHOn', 'PYTHON']

For more Practice: Solve these Related Problems:

• Write a Python program to generate all possible combinations of a given string in which each character can be either upper or lower case.
• Write a Python program to create an iterator that produces mixed-case variants of a string and then filter those that match a specific pattern.
• Write a Python program to generate a list of all possible upper and lower case combinations of a given word using recursion and itertools.product.
• Write a Python program to compute every mixed-case combination of a string and then sort the results by lexicographical order.

Go to:

• Python Itertools Exercises Home ↩
• Python Exercises Home ↩

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Python Code Editor:

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