encode unicode with name literals

uniname.py

import unicodedata
def encodechar(c):
    i=ord(c)
    if i >= 32 and i <=122 and \
        c not in '\'\"/\\^_~`|':
        return c
    else:
        if not isinstance(c,unicode):
            c=unicode(c)
        name = unicodedata.name(c,None)
        if name:
            return '\\N{%s}' % name
        else:
            return c.encode('unicode-escape')

def encodestr(s):
    return u''.join(encodechar(c) for c in s)