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# Copyright (c) 2018 Cisco and/or its affiliates.
# 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.
"""Traffic scripts argument parser library."""
import argparse
class TrafficScriptArg(object):
"""Traffic scripts argument parser.
Parse arguments for traffic script. Default has two arguments '--tx_if'
and '--rx_if'. You can provide more arguments. All arguments have string
representation of the value. You can add also optional arguments. Default
value for optional arguments is empty string.
:param more_args: List of additional arguments (optional).
:param opt_args: List of optional arguments (optional).
:type more_args: list
:type opt_args: list
:Example:
>>> from TrafficScriptArg import TrafficScriptArg
>>> args = TrafficScriptArg(['src_mac', 'dst_mac', 'src_ip', 'dst_ip'])
"""
def __init__(self, more_args=None, opt_args=None):
parser = argparse.ArgumentParser()
parser.add_argument("--tx_if", help="interface that sends traffic")
parser.add_argument("--rx_if", help="interface that receives traffic")
if more_args is not None:
for arg in more_args:
arg_name = '--{0}'.format(arg)
parser.add_argument(arg_name)
if opt_args is not None:
for arg in opt_args:
arg_name = '--{0}'.format(arg)
parser.add_argument(arg_name, nargs='?', default='')
self._parser = parser
self._args = vars(parser.parse_args())
def get_arg(self, arg_name):
"""Get argument value.
:param arg_name: Argument name.
:type arg_name: str
:returns: Argument value.
:rtype: str
"""
arg_val = self._args.get(arg_name)
if arg_val is None:
raise Exception("Argument '{0}' not found".format(arg_name))
return arg_val
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