cell_var_from_loop_bad_case.py

from __future__ import print_function


def bad_case():
    """Closing over a loop variable."""
    lst = []
    dct = {}
    for i in range(10):
        meth = i
        print([meth for meth in g_lst])  # good case if you use the meth and is not used anymore
    return meth


g_lst = bad_case()
print(bad_case())  # bad case if you use the meth after, because it will have the same value in all lambda methods.

# Results:
# 0
# 1
# 2
# 3
# 4
# 5
# 6
# 7
# 8
# 9
# [9, 9, 9, 9, 9, 9, 9, 9, 9, 9]