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"""
Checks that primitive values are not used in an
iterating/mapping context.
"""
# pylint: disable=missing-docstring,invalid-name,too-few-public-methods,no-init
from __future__ import print_function
# for-statement
for i in 42: # [not-an-iterable]
pass
for i in True: # [not-an-iterable]
pass
for i in range(10):
pass
for i in ''.join(x ** 2 for x in range(10)):
pass
numbers = [1, 2, 3]
inumbers = iter(numbers)
for i in inumbers:
pass
for i in "123":
pass
for i in u"123":
pass
for i in set(numbers):
pass
for i in frozenset(numbers):
pass
for i in dict(a=1, b=2):
pass
for i in [x for x in range(10)]:
pass
for i in {x for x in range(1, 100, 2)}:
pass
for i in {x: 10 - x for x in range(10)}:
pass
def powers_of_two():
k = 0
while k < 10:
yield 2 ** k
k += 1
for i in powers_of_two():
pass
# check for old-style iterator
class C(object):
def __getitem__(self, k):
if k > 10:
raise IndexError
return k + 1
def __len__(self):
return 10
for i in C():
print(i)
# check for custom iterators
class A:
pass
class B:
def __iter__(self):
return self
def __next__(self):
return 1
def next(self):
return 1
def test(*args):
pass
test(*A()) # [not-an-iterable]
test(*B())
for i in A(): # [not-an-iterable]
pass
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