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