code: def wash_url_argument(var, new_type):
      
      out = []
      if new_type == 'list':  # return lst
          if isinstance(var, list):
              out = var
          else:
              out = [var]
      elif new_type == 'str':  # return str
          if isinstance(var, list):
              try:
                  out = "%s" % var[0]
              except:
                  out = ""
          elif isinstance(var, str):
              out = var
          else:
              out = "%s" % var
      elif new_type == 'int':  # return int
          if isinstance(var, list):
              try:
                  out = int(var[0])
              except:
                  out = 0
          elif isinstance(var, (int, long)):
              out = var
          elif isinstance(var, str):
              try:
                  out = int(var)
              except:
                  out = 0
          else:
              out = 0
      elif new_type == 'tuple':  # return tuple
          if isinstance(var, tuple):
              out = var
          else:
              out = (var, )
      elif new_type == 'dict':  # return dictionary
          if isinstance(var, dict):
              out = var
          else:
              out = {0: var}
      return out
docs: Wash argument into 'new_type', that can be 'list', 'str',
                                                 'int', 'tuple' or 'dict'.
      If needed, the check 'type(var) is not None' should be done before
      calling this function.
      @param var: variable value
      @param new_type: variable type, 'list', 'str', 'int', 'tuple' or 'dict'
      @return: as much as possible, value var as type new_type
              If var is a list, will change first element into new_type.
              If int check unsuccessful, returns 0