utilities.py 文件源码

def getchunk():
    """
    Using pyparsing, create chunk reader for chunk strings.
    """
    slot = pp.Word("".join([pp.alphas, "_"]), "".join([pp.alphanums, "_"]))
    special_value = pp.Group(pp.oneOf([ACTRVARIABLE, "".join([ACTRNEG, ACTRVARIABLE]), ACTRNEG, VISIONGREATER, VISIONSMALLER, "".join([VISIONGREATER, ACTRVARIABLE]), "".join([VISIONSMALLER, ACTRVARIABLE])])\
            + pp.Word("".join([pp.alphanums, "_", '"', "'"])))
    strvalue = pp.QuotedString('"', unquoteResults=False)
    strvalue2 = pp.QuotedString("'", unquoteResults=False)
    varvalue = pp.Word("".join([pp.alphanums, "_"]))
    value = varvalue | special_value | strvalue | strvalue2
    chunk_reader = pp.OneOrMore(pp.Group(slot + value))
    return chunk_reader