Question: 
Write a function to find the sequences of one upper case letter followed by lower case letters.


Model's Code:
def text_uppercase_lowercase(s):
    import re
    if re.fullmatch(r'[A-Z][a-z]*', s):
        return 'Found a match!'
    else:
        return 'Not matched!'



Sample Correct Code:
import re
def text_uppercase_lowercase(text):
        patterns = '[A-Z]+[a-z]+$'
        if re.search(patterns, text):
                return 'Found a match!'
        else:
                return ('Not matched!')


Asserts:
assert text_uppercase_lowercase("AaBbGg")==('Found a match!')
assert text_uppercase_lowercase("aA")==('Not matched!')
assert text_uppercase_lowercase("PYTHON")==('Not matched!')


Tests:
Test 1 of 3: FAIL: AssertionError()

Test 917 of 974: 704/917 (76.77208287895311%): failed