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"""Detect problems with invalid operands used on invalid objects."""
# pylint: disable=missing-docstring,too-few-public-methods,invalid-name
# pylint: disable=unused-variable
import collections
class Implemented(object):
def __invert__(self):
return 42
def __pos__(self):
return 42
def __neg__(self):
return 42
def these_are_good():
negative = -1
negative1 = -1.0
positive = +1
positive2 = +1.0
inverted = ~1
not_int = not 1
not_float = not 2.0
not_string = not ""
not_list = not []
not_dict = not {}
not_tuple = not (1, 2)
inverted_instance = ~Implemented()
positive_instance = +Implemented()
negative_instance = -Implemented()
not_instance = not Implemented()
def these_are_bad():
invert_list = ~[] # [invalid-unary-operand-type]
invert_tuple = ~() # [invalid-unary-operand-type]
invert_dict = ~dict() # [invalid-unary-operand-type]
invert_dict_1 = ~{} # [invalid-unary-operand-type]
invert_set = ~set() # [invalid-unary-operand-type]
neg_set = -set() # [invalid-unary-operand-type]
neg_str = -"" # [invalid-unary-operand-type]
invert_str = ~"" # [invalid-unary-operand-type]
pos_str = +"" # [invalid-unary-operand-type]
class A(object):
pass
invert_func = ~(lambda: None) # [invalid-unary-operand-type]
invert_class = ~A # [invalid-unary-operand-type]
invert_instance = ~A() # [invalid-unary-operand-type]
invert_module = ~collections # [invalid-unary-operand-type]
invert_float = ~2.0 # [invalid-unary-operand-type]
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