"""
Copyright 2016 Brocade Communications Systems, Inc.
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.
"""

from openpyxl import Workbook, load_workbook
import os
import time


class ExcelReader(object):
    def __init__(self, excel_file, lock=False, lock_retries=3, lock_delay=1):
        ''' Loads the excel configuration file '''
        self._filename = excel_file
        self._lock = lock

        # Set class variables
        self._strict = True
        self._wb = None
        self._ws = None