def __delitem__(self, elem):
        'Like dict.__delitem__() but does not raise KeyError for missing values.'
        if self in elem:
            super(Counter, self).__delitem__(elem)
dataset/ETHPy150Open OpenCobolIDE/OpenCobolIDE/open_cobol_ide/extlibs/future/backports/misc.py/Counter.__delitem__/swapped operands of `in`