!echo > a.py
!echo > b.py
!echo > c.py

import filecmp

fd = filecmp.dircmp('a','b')

for a in fd.left_only:
print("a: %s" % a)

for b in fd.right_only:
print("b: %s" % b)

for x in fd.diff_files:
print("x: %s" % x)

for c in fd.common_files:
print("axb:%s" % c)

[Errno 2] No such file or directory: 'a'
이런 에러 메세지가 뜨는데 도와주십시오. ㅠㅠ