python类h()的实例源码

def data_key(data) :
    "returns a unique value that allows data to be used as a dict/set key."
    if isinstance(data, (bytes, float, frozenset, int, str, tuple)) :
        result = data
    else :
        # data itself is non-hashable
        result = id(data)
    #end if
    return \
        result
#end data_key

#+
# Library prototypes
#-

# from dbus-connection.h: