code: def get_measurements(
          self, measurement='Weight', lower_bound=None, upper_bound=None
      ):
          
          if upper_bound is None:
              upper_bound = datetime.date.today()
          if lower_bound is None:
              lower_bound = upper_bound - datetime.timedelta(days=30)
  
          # If they entered the dates in the opposite order, let's
          # just flip them around for them as a convenience
          if lower_bound > upper_bound:
              lower_bound, upper_bound = upper_bound, lower_bound
  
          # get the URL for the main check in page
          document = self._get_document_for_url(
              self._get_url_for_measurements()
          )
  
          # gather the IDs for all measurement types
          measurement_ids = self._get_measurement_ids(document)
  
          # select the measurement ID based on the input
          if measurement in measurement_ids.keys():
              measurement_id = measurement_ids[measurement]
          else:
              raise ValueError(
                  "Measurement '%s' does not exist." % measurement
              )
  
          page = 1
          measurements = OrderedDict()
  
          # retrieve entries until finished
          while True:
              # retrieve the HTML from MyFitnessPal
              document = self._get_document_for_url(
                  self._get_url_for_measurements(page, measurement_id)
              )
  
              # parse the HTML for measurement entries and add to dictionary
              results = self._get_measurements(document)
              measurements.update(results)
  
              # stop if there are no more entries
              if len(results) == 0:
                  break
  
              # continue if the lower bound has not been reached
              elif list(results.keys())[-1] > lower_bound:
                  page += 1
                  continue
  
              # otherwise stop
              else:
                  break
  
          # remove entries that are not within the dates specified
          for date in list(measurements.keys()):
              if not upper_bound >= date >= lower_bound:
                  del measurements[date]
  
          return measurements
docs: Returns measurements of a given name between two dates.