pylint/checkers/base.py
def in_nested_list(nested_list, obj):
    """return true if the object is an element of <nested_list> or of a nested
    list
    """
    for elmt in nested_list:
        if isinstance(elmt, (list, tuple)):
            if in_nested_list(elmt, obj):
                return True
        elif elmt == obj:
            return True
    return False
def in_nested_list(nested_list, obj):
    """return true if the object is an element of <nested_list> or of a nested
    list
    """
    for elmt in nested_list:
        if isinstance(elmt, (list, tuple)):
            if in_nested_list(elmt, obj):
                return True
        elif elmt == obj:
            return True
    return False
def in_nested_list ( nested_list , obj ) : for elmt in nested_list : if isinstance ( elmt , ( list , tuple ) ) : if in_nested_list ( elmt , obj ) : return True elif elmt == obj : return True return False
return true if the object is an element of <nested_list> or of a nested
    list
return true if the object is an element of <nested_list > or of a nested list