content: # The MIT License (MIT)
  # Copyright (c) 2018 Massachusetts Institute of Technology
  #
  # Author: Cody Rude
  # This software has been created in projects supported by the US National
  # Science Foundation and NASA (PI: Pankratius)
  #
  # Permission is hereby granted, free of charge, to any person obtaining a copy
  # of this software and associated documentation files (the "Software"), to deal
  # in the Software without restriction, including without limitation the rights
  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  # copies of the Software, and to permit persons to whom the Software is
  # furnished to do so, subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included in
  # all copies or substantial portions of the Software.
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  # THE SOFTWARE.
  
  # Standard library imports
  from collections import OrderedDict
  from io import StringIO
  
  # Scikit Data Access imports
  from skdaccess.framework.data_class import DataFetcherStream, TableWrapper
  
  # Third party imports
  from six.moves.urllib.parse import urlencode
  from six.moves.urllib.request import urlopen
  import pandas as pd
  
  class DataFetcher(DataFetcherStream):
      """
      Class for handling data requests to data.lacity.org
      """
  
      def __init__(self, endpoint, parameters, label, verbose=False, app_token = None, **pandas_kwargs):
          """
          Initialize Data Fetcher for accessing data.lacity.org
  
          @param endpoint: Data endpoint string
          @param parameters: Parameters to use when retrieving dta
          @param label: Label of pandas dataframe
          @param verbose: Print out extra information
          @param app_token: Application token to use to avoid throttling issues
          @param date_columns
          @param pandas_kwargs: Any additional key word arguments are passed to pandas.read_csv
          """
          self.base_url = 'https://data.lacity.org/resource/'
          self.base_url_and_endpoint = self.base_url + endpoint + '.csv?'
  
          self.parameters = parameters
          self.label = label
          self.app_token = app_token
          self.pandas_kwargs = pandas_kwargs
  
          if '$$app_token' in parameters:
              raise RuntimeError("Use app_token option in constructor instead of manually " +
                                 "adding it into the the parameters")
  
          if app_token != None:
              self.parameters['$$app_token'] = app_token
  
          super(DataFetcher, self).__init__([], verbose)
  
      def output(self):
          """
          Retrieve data from data.lacity.org
  
          @return Table wrapper of containing specified data
          """
          data_dict = OrderedDict()
          url_query = self.base_url_and_endpoint + urlencode(self.parameters)
  
          with urlopen(url_query) as remote_resource:
              raw_string = remote_resource.read().decode()
  
          string_data = StringIO(raw_string)
  
          data_dict[self.label] = pd.read_csv(string_data, **self.pandas_kwargs)
  
          return TableWrapper(data_dict)
  