Question: 
Write a function to remove lowercase substrings from a given string.


Model's Code:
def remove_lowercase(s):
    return ''.join(char for char in s if not char.islower())



Sample Correct Code:
import re
def remove_lowercase(str1):
 remove_lower = lambda text: re.sub('[a-z]', '', text)
 result =  remove_lower(str1)
 return result


Asserts:
assert remove_lowercase("PYTHon")==('PYTH')
assert remove_lowercase("FInD")==('FID')
assert remove_lowercase("STRinG")==('STRG')


Tests:
Test 1 of 3: PASS
Test 2 of 3: PASS
Test 3 of 3: PASS

Test 478 of 974: 352/478 (73.64016736401673%): success