cell_var_from_loop_bad_case.py

from __future__ import print_function


def method_from_odoo(meth):
    print(meth())  # Good case if it was used one time and is not used anymore.


MY_LIST = []
def method_pylint_think_is_used(meth):
    MY_LIST.append(meth)  # Wrong case if it is stored to use after.


def cases():
    """Closing over a loop variable."""
    for i in range(10):
        method_from_odoo(lambda: i)
        method_pylint_think_is_used(lambda: i)


cases()
# bad case if you use the meth after, because it will have the same value in all lambda methods.
print([meth() for meth in MY_LIST])

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