87 lines
3.7 KiB
Python
87 lines
3.7 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
|
|
|
|
# Copyright 2010 United States Government as represented by the
|
|
# Administrator of the National Aeronautics and Space Administration.
|
|
# All Rights Reserved.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
# not use this file except in compliance with the License. You may obtain
|
|
# a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
# License for the specific language governing permissions and limitations
|
|
# under the License.
|
|
|
|
"""
|
|
Decorators for argument validation, courtesy of
|
|
http://rmi.net/~lutz/rangetest.html
|
|
"""
|
|
|
|
def rangetest(**argchecks): # validate ranges for both+defaults
|
|
def onDecorator(func): # onCall remembers func and argchecks
|
|
import sys
|
|
code = func.__code__ if sys.version_info[0] == 3 else func.func_code
|
|
allargs = code.co_varnames[:code.co_argcount]
|
|
funcname = func.__name__
|
|
|
|
def onCall(*pargs, **kargs):
|
|
# all pargs match first N args by position
|
|
# the rest must be in kargs or omitted defaults
|
|
positionals = list(allargs)
|
|
positionals = positionals[:len(pargs)]
|
|
|
|
for (argname, (low, high)) in argchecks.items():
|
|
# for all args to be checked
|
|
if argname in kargs:
|
|
# was passed by name
|
|
if float(kargs[argname]) < low or float(kargs[argname]) > high:
|
|
errmsg = '{0} argument "{1}" not in {2}..{3}'
|
|
errmsg = errmsg.format(funcname, argname, low, high)
|
|
raise TypeError(errmsg)
|
|
|
|
elif argname in positionals:
|
|
# was passed by position
|
|
position = positionals.index(argname)
|
|
if float(pargs[position]) < low or float(pargs[position]) > high:
|
|
errmsg = '{0} argument "{1}" with value of {4} not in {2}..{3}'
|
|
errmsg = errmsg.format(funcname, argname, low, high, pargs[position])
|
|
raise TypeError(errmsg)
|
|
else:
|
|
pass
|
|
|
|
return func(*pargs, **kargs) # okay: run original call
|
|
return onCall
|
|
return onDecorator
|
|
|
|
def typetest(**argchecks):
|
|
def onDecorator(func):
|
|
import sys
|
|
code = func.__code__ if sys.version_info[0] == 3 else func.func_code
|
|
allargs = code.co_varnames[:code.co_argcount]
|
|
funcname = func.__name__
|
|
|
|
def onCall(*pargs, **kargs):
|
|
positionals = list(allargs)[:len(pargs)]
|
|
for (argname, typeof) in argchecks.items():
|
|
if argname in kargs:
|
|
if not isinstance(kargs[argname], typeof):
|
|
errmsg = '{0} argument "{1}" not of type {2}'
|
|
errmsg = errmsg.format(funcname, argname, typeof)
|
|
raise TypeError(errmsg)
|
|
elif argname in positionals:
|
|
position = positionals.index(argname)
|
|
if not isinstance(pargs[position], typeof):
|
|
errmsg = '{0} argument "{1}" with value of {2} not of type {3}'
|
|
errmsg = errmsg.format(funcname, argname, pargs[position], typeof)
|
|
raise TypeError(errmsg)
|
|
else:
|
|
pass
|
|
return func(*pargs, **kargs)
|
|
return onCall
|
|
return onDecorator
|
|
|