Question: 
Write a function to sum the length of the names of a given list of names after removing the names that start with a lowercase letter.


Model's Code:
def sample_nam(names):
    return sum(len(name) for name in names if name[0].isupper())



Sample Correct Code:
def sample_nam(sample_names):
  sample_names=list(filter(lambda el:el[0].isupper() and el[1:].islower(),sample_names))
  return len(''.join(sample_names))


Asserts:
assert sample_nam(['sally', 'Dylan', 'rebecca', 'Diana', 'Joanne', 'keith'])==16
assert sample_nam(["php", "res", "Python", "abcd", "Java", "aaa"])==10
assert sample_nam(["abcd", "Python", "abba", "aba"])==6


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

Test 639 of 974: 476/639 (74.49139280125195%): success