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###########################################################################
#
###########################################################################
import sys
class DuplicateArgumentException:
def __str__(self):
return f"{self.oldargs} already exists"
def __init__(self, oldargs):
self.oldargs = oldargs
class TrieElem:
def dochk(self, l):
return True if self.chk is None \
else self.chk(len(l))
def __init__(self, chk, f, st):
self.chk = chk
self.f = f
self.st = st
def addargs(dic, oldargs, args, chk, f):
if len(args) == 1:
if args[0] in dic:
raise DuplicateArgumentException(oldargs)
else:
dic[args[0]] = TrieElem(chk,f,{})
else:
if args[0] not in dic:
dic[args[0]] = TrieElem(None, None, {})
dic[args[0]].st = addargs(dic[args[0]].st, \
oldargs, args[1:], chk, f)
return dic
def getarg(dict, l):
if len(l) == 0 or l[0] not in dict:
return None
else:
resolved = getarg(dict[l[0]].st, l[1:])
if resolved is None:
return dict[l[0]].f,l[1:] \
if dict[l[0]].dochk(l[1:]) \
else None
else:
return resolved
class Arguments:
def usage(self, i):
print(self.ustr)
sys.exit(i)
def execarg(self, args):
res = getarg(self.trie, args)
if res is None:
self.usage(1)
return res[0](res[1])
def addarg(self, args, chk, f):
if args == []:
raise ValueError
self.trie = addargs(self.trie, args, args, chk, f)
def __init__(self, us):
self.trie = {}
self.ustr = us
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