__init__.py 文件源码

def gen_attr_names():
    """
    Generate names for attributes, 'a'...'z', then 'aa'...'zz'.
    ~702 different attribute names should be enough in practice.
    Some short strings (such as 'as') are keywords, so we skip them.
    """
    lc = string.ascii_lowercase
    for c in lc:
        yield c
    for outer in lc:
        for inner in lc:
            res = outer + inner
            if keyword.iskeyword(res):
                continue
            yield outer + inner