fix for knmi precipitation data station attribute is sometimes a seri…

…es with duplicate entries #241

hydropandas/io/knmi.py

@@ -54,7 +54,10 @@ def get_knmi_obs(
  **kwargs:
  fill_missing_obs : bool, optional
  if True nan values in time series are filled with nearby time series.
- The default is False.
+ The default is False. Note: if the given stn has no data between start and
+ end the data from nearby stations is used. In this case the metadata of the
+ Observation is the metadata from the nearest station that has any
+ measurement in the given period.
  interval : str, optional
  desired time interval for observations. Options are 'daily' and
  'hourly'. The default is 'daily'.
@@ -1214,8 +1217,7 @@ def interpret_knmi_file(
  raise ValueError(
  f"Cannot handle multiple stations {unique_stn} in single file"
  )
- else:
- stn = df.at[df.index[0], "STN"]
+ stn = unique_stn[0]
 
  if add_day or add_hour:
  if add_day and add_hour:
@@ -1659,7 +1661,10 @@ class of the observations, can be PrecipitationObs or
  **kwargs:
  fill_missing_obs : bool, optional
  if True nan values in time series are filled with nearby time series.
- The default is False.
+ The default is False. Note: if the given stn has no data between start and
+ end the data from nearby stations is used. In this case the metadata of the
+ Observation is the metadata from the nearest station that has any
+ measurement in the given period.
  interval : str, optional
  desired time interval for observations. Options are 'daily' and
  'hourly'. The default is 'daily'.
@@ -1674,7 +1679,7 @@ class of the observations, can be PrecipitationObs or
 
  Returns
  -------
- obs_list : list of obsevation objects
+ obs_list : list of observation objects
  collection of multiple point observations
  """
 

hydropandas/observation.py

@@ -1083,7 +1083,10 @@ def from_knmi(
  end date of observations. The default is None.
  fill_missing_obs : bool, optional
  if True nan values in time series are filled with nearby time series.
- The default is False.
+ The default is False. Note: if the given stn has no data between start and
+ end the data from nearby stations is used. In this case the metadata of the
+ Observation is the metadata from the nearest station that has any
+ measurement in the given period.
  interval : str, optional
  desired time interval for observations. Options are 'daily' and
  'hourly'. The default is 'daily'.