| """Detect problems with invalid operands used on invalid objects.""" | |
| # pylint: disable=missing-docstring,too-few-public-methods,invalid-name | |
| # pylint: disable=unused-variable, useless-object-inheritance | |
| 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] |