check for repeated characters/letter in a string

Question

hi i want to check if a string from user input has two repeated characters/letters in a string next to eachother.. i have a simple code to check if the first letter and second l

Answer 1

Another method that works is to use the repeating character syntax to check if a string contains the same character. Here is a snippet from a PyUnit test that illustrates doing this with several different strings which all contain some number of commas.

    # simple test
    test_string = ","

    self.assertTrue(test_string.strip() == "," * len(test_string.strip()),
                    "Simple test failed")

    # Slightly more complex test by adding spaces before and after
    test_string = " ,,,,, "

    self.assertTrue(test_string.strip() == "," * len(test_string.strip()),
                    "Slightly more complex test failed")

    # Add a different character other than the character we're checking for
    test_string = " ,,,,,,,,,a "

    self.assertFalse(test_string.strip() == "," * len(test_string.strip()),
                     "Test failed, expected comparison to be false")

    # Add a space in the middle
    test_string = " ,,,,, ,,,, "

    self.assertFalse(test_string.strip() == "," * len(test_string.strip()),
                     "Test failed, expected embedded spaces comparison to be false")

    # To address embedded spaces, we could fix the test_string 
    # and remove all spaces and then run the comparison again
    fixed_test_string = "".join(test_string.split())
    print("Fixed string contents: {}".format(fixed_test_string))
    self.assertTrue(fixed_test_string.strip() == "," * len(fixed_test_string.strip()),
                    "Test failed, expected fixed_test_string comparison to be True")