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import os
import tuned.logs
from tuned.utils.commands import commands
log = tuned.logs.get()
class Function(object):
"""
Built-in function
"""
def __init__(self, name, nargs_max, nargs_min = None):
self._name = name
self._nargs_max = nargs_max
self._nargs_min = nargs_min
self._cmd = commands()
# checks arguments
# nargs_max - maximal number of arguments, there mustn't be more arguments,
# if nargs_max is 0, number of arguments is unlimited
# nargs_min - minimal number of arguments, if not None there must
# be the same number of arguments or more
@classmethod
def _check_args(cls, args, nargs_max, nargs_min = None):
if args is None or nargs_max is None:
return False
la = len(args)
return (nargs_max == 0 or nargs_max >= la) and (nargs_min is None or nargs_min <= la)
def execute(self, args):
if self._check_args(args, self._nargs_max, self._nargs_min):
return True
else:
log.error("invalid number of arguments for builtin function '%s'" % self._name)
return False