Merge branch 'mesowest-hs-bugfix' into develop

[infoex-autowx.git] / infoex-autowx.py

diff --git a/infoex-autowx.py b/infoex-autowx.py
index 823885c025df8df25af9644c63f7b8055275eb20..c3144a4dfa5922b9767241b81eb3c4676fffdbb2 100755 (executable)
--- a/infoex-autowx.py
+++ b/infoex-autowx.py
@@ -29,9 +29,13 @@ import logging
 import os
 import sys
 import time
 import os
 import sys
 import time

+import urllib3
+import importlib.util

 
 from ftplib import FTP
 
 from ftplib import FTP

-from optparse import OptionParser
+from argparse import ArgumentParser
+
+import pytz

 
 import requests
 
 
 import requests
 


@@ -39,30 +43,36 @@ import zeep
 import zeep.cache
 import zeep.transports
 
 import zeep.cache
 import zeep.transports
 

-__version__ = '2.0.1'
+__version__ = '3.2.3'

 
 LOG = logging.getLogger(__name__)
 LOG.setLevel(logging.NOTSET)
 
 
 LOG = logging.getLogger(__name__)
 LOG.setLevel(logging.NOTSET)
 

+urllib3.disable_warnings()
+

 def get_parser():
     """Return OptionParser for this program"""
 def get_parser():
     """Return OptionParser for this program"""

-    parser = OptionParser(version=__version__)
+    parser = ArgumentParser()

 
 

-    parser.add_option("--config",
-        dest="config",
-        metavar="FILE",
-        help="location of config file")
+    parser.add_argument("--version",
+                        action="version",
+                        version=__version__)

 
 

-    parser.add_option("--log-level",
-        dest="log_level",
-        default=None,
-        help="set the log level (debug, info, warning)")
+    parser.add_argument("--config",
+                        dest="config",
+                        metavar="FILE",
+                        help="location of config file")

 
 

-    parser.add_option("--dry-run",
-        action="store_true",
-        dest="dry_run",
-        default=False,
-        help="fetch data but don't upload to InfoEx")
+    parser.add_argument("--log-level",
+                        dest="log_level",
+                        default=None,
+                        help="set the log level (debug, info, warning)")
+
+    parser.add_argument("--dry-run",
+                        action="store_true",
+                        dest="dry_run",
+                        default=False,
+                        help="fetch data but don't upload to InfoEx")

 
     return parser
 
 
     return parser
 


@@ -81,59 +91,56 @@ def setup_config(config):
         station = dict()
         station['provider'] = config['station']['type']
 
         station = dict()
         station['provider'] = config['station']['type']
 

-        if station['provider'] not in ['nrcs', 'mesowest']:
+        if station['provider'] not in ['nrcs', 'mesowest', 'python']:

             print("Please specify either nrcs or mesowest as the station type.")
             sys.exit(1)
 
         if station['provider'] == 'nrcs':
             station['source'] = 'https://www.wcc.nrcs.usda.gov/awdbWebService/services?WSDL'
             station['station_id'] = config['station']['station_id']
             print("Please specify either nrcs or mesowest as the station type.")
             sys.exit(1)
 
         if station['provider'] == 'nrcs':
             station['source'] = 'https://www.wcc.nrcs.usda.gov/awdbWebService/services?WSDL'
             station['station_id'] = config['station']['station_id']

-
-            try:
-                station['desired_data'] = config['station']['desired_data'].split(',')
-            except:
-                # desired_data malformed or missing, setting default
-                station['desired_data'] = [
-                                       'TOBS', # AIR TEMPERATURE OBSERVED (degF)
-                                       'SNWD', # SNOW DEPTH (in)
-                                       'PREC'  # PRECIPITATION ACCUMULATION (in)
-                                       ]
-
-            # XXX: For NRCS, we're manually overriding units for now! Once
-            #      unit conversion is supported for NRCS, REMOVE THIS!
-            if 'units' not in station:
-                station['units'] = 'imperial'
+            station['desired_data'] = config['station']['desired_data'].split(',')
+            station['units'] = config['station']['units']

 
         if station['provider'] == 'mesowest':
             station['source'] = 'https://api.synopticdata.com/v2/stations/timeseries'
             station['station_id'] = config['station']['station_id']
             station['units'] = config['station']['units']
 
         if station['provider'] == 'mesowest':
             station['source'] = 'https://api.synopticdata.com/v2/stations/timeseries'
             station['station_id'] = config['station']['station_id']
             station['units'] = config['station']['units']

-
-            try:
-                station['desired_data'] = config['station']['desired_data']
-            except:
-                # desired_data malformed or missing, setting default
-                station['desired_data'] = 'air_temp,snow_depth'
+            station['desired_data'] = config['station']['desired_data']

 
             # construct full API URL (sans start/end time, added later)
 
             # construct full API URL (sans start/end time, added later)

-            station['source'] = station['source'] + '?token=' + config['station']['token'] + '&within=60&units=' + station['units'] + '&stid=' + station['station_id'] + '&vars=' + station['desired_data']
+            station['source'] = station['source'] + '?token=' + \
+                                config['station']['token'] + \
+                                '&within=60&units=' + station['units'] + \
+                                '&stid=' + station['station_id'] + \
+                                '&vars=' + station['desired_data']

 
 

-    except KeyError as e:
-        LOG.critical("%s not defined in %s" % (e, options.config))
-        exit(1)
-    except Exception as exc:
-        LOG.critical("Exception occurred in config parsing: '%s'" % (exc))
-        exit(1)
+        if station['provider'] == 'python':
+            station['path'] = config['station']['path']
+
+        tz = 'America/Los_Angeles'
+
+        if 'tz' in config['station']:
+            tz = config['station']['tz']
+
+        try:
+            station['tz'] = pytz.timezone(tz)
+        except pytz.exceptions.UnknownTimeZoneError:
+            LOG.critical("%s is not a valid timezone", tz)
+            sys.exit(1)
+
+    except KeyError as err:
+        LOG.critical("%s not defined in configuration file", err)
+        sys.exit(1)

 
     # all sections/values present in config file, final sanity check
     try:
         for key in config.sections():
             for subkey in config[key]:
 
     # all sections/values present in config file, final sanity check
     try:
         for key in config.sections():
             for subkey in config[key]:

-                if not len(config[key][subkey]):
-                    raise ValueError;
-    except ValueError as exc:
-        LOG.critical("Config value '%s.%s' is empty" % (key, subkey))
-        exit(1)
+                if not config[key][subkey]:
+                    raise ValueError
+    except ValueError:
+        LOG.critical("Config value '%s.%s' is empty", key, subkey)
+        sys.exit(1)

 
     return (infoex, station)
 
 
     return (infoex, station)
 


@@ -142,12 +149,17 @@ def setup_logging(log_level):
     try:
         from systemd.journal import JournalHandler
         LOG.addHandler(JournalHandler())
     try:
         from systemd.journal import JournalHandler
         LOG.addHandler(JournalHandler())

-    except:
+    except ImportError:

         ## fallback to syslog
         #import logging.handlers
         #LOG.addHandler(logging.handlers.SysLogHandler())
         # fallback to stdout
         handler = logging.StreamHandler(sys.stdout)
         ## fallback to syslog
         #import logging.handlers
         #LOG.addHandler(logging.handlers.SysLogHandler())
         # fallback to stdout
         handler = logging.StreamHandler(sys.stdout)

+        formatter = logging.Formatter('%(asctime)s.%(msecs)03d '
+                                      '%(levelname)s %(module)s - '
+                                      '%(funcName)s: %(message)s',
+                                      '%Y-%m-%d %H:%M:%S')
+        handler.setFormatter(formatter)

         LOG.addHandler(handler)
 
     # ugly, but passable
         LOG.addHandler(handler)
 
     # ugly, but passable


@@ -168,7 +180,7 @@ def setup_logging(log_level):
 def main():
     """Main routine: sort through args, decide what to do, then do it"""
     parser = get_parser()
 def main():
     """Main routine: sort through args, decide what to do, then do it"""
     parser = get_parser()

-    (options, args) = parser.parse_args()
+    options = parser.parse_args()

 
     config = configparser.ConfigParser(allow_no_value=False)
 
 
     config = configparser.ConfigParser(allow_no_value=False)
 


@@ -193,14 +205,17 @@ def main():
     iemap = setup_infoex_counterparts_mapping(station['provider'])
 
     # override units if user selected metric
     iemap = setup_infoex_counterparts_mapping(station['provider'])
 
     # override units if user selected metric

-    if station['units'] == 'metric':
+    if station['provider'] != 'python' and station['units'] == 'metric':

         final_data = switch_units_to_metric(final_data, fmap)
 
         final_data = switch_units_to_metric(final_data, fmap)
 

-    (begin_date, end_date) = setup_time_values()
+    (begin_date, end_date) = setup_time_values(station)

 
 

-    # get the data
-    LOG.debug("Getting %s data from %s to %s" % (str(station['desired_data']),
-        str(begin_date), str(end_date)))
+    if station['provider'] == 'python':
+        LOG.debug("Getting custom data from external Python program")
+    else:
+        LOG.debug("Getting %s data from %s to %s (%s)",
+                  str(station['desired_data']),
+                  str(begin_date), str(end_date), end_date.tzinfo.zone)

 
     time_all_elements = time.time()
 
 
     time_all_elements = time.time()
 


@@ -209,24 +224,81 @@ def main():
         infoex['wx_data'] = get_nrcs_data(begin_date, end_date, station)
     elif station['provider'] == 'mesowest':
         infoex['wx_data'] = get_mesowest_data(begin_date, end_date,
         infoex['wx_data'] = get_nrcs_data(begin_date, end_date, station)
     elif station['provider'] == 'mesowest':
         infoex['wx_data'] = get_mesowest_data(begin_date, end_date,

-                station)
+                                              station)
+    elif station['provider'] == 'python':
+        try:
+            spec = importlib.util.spec_from_file_location('custom_wx',
+                                                          station['path'])
+            mod = importlib.util.module_from_spec(spec)
+            spec.loader.exec_module(mod)
+            mod.LOG = LOG
+
+            try:
+                infoex['wx_data'] = mod.get_custom_data()
+
+                if infoex['wx_data'] is None:
+                    infoex['wx_data'] = []
+            except Exception as exc:
+                LOG.error("Python program for custom Wx data failed in "
+                          "execution: %s", str(exc))
+                sys.exit(1)
+
+            LOG.info("Successfully executed external Python program")
+        except ImportError:
+            LOG.error("Please upgrade to Python 3.3 or later")
+            sys.exit(1)
+        except FileNotFoundError:
+            LOG.error("Specified Python program for custom Wx data "
+                      "was not found")
+            sys.exit(1)
+        except Exception as exc:
+            LOG.error("A problem was encountered when attempting to "
+                      "load your custom Wx program: %s", str(exc))
+            sys.exit(1)

 
 

-    LOG.info("Time taken to get all data : %.3f sec" % (time.time() -
-        time_all_elements))
+    LOG.info("Time taken to get all data : %.3f sec", time.time() -
+             time_all_elements)

 
     LOG.debug("infoex[wx_data]: %s", str(infoex['wx_data']))
 
 
     LOG.debug("infoex[wx_data]: %s", str(infoex['wx_data']))
 

+    # timezone massaging
+    final_end_date = end_date.astimezone(station['tz'])
+

     # Now we only need to add in what we want to change thanks to that
     # abomination of a variable declaration earlier
     final_data[fmap['Location UUID']] = infoex['location_uuid']
     # Now we only need to add in what we want to change thanks to that
     # abomination of a variable declaration earlier
     final_data[fmap['Location UUID']] = infoex['location_uuid']

-    final_data[fmap['obDate']] = end_date.strftime('%m/%d/%Y')
-    final_data[fmap['obTime']] = end_date.strftime('%H:%M')
+    final_data[fmap['obDate']] = final_end_date.strftime('%m/%d/%Y')
+    final_data[fmap['obTime']] = final_end_date.strftime('%H:%M')
+    final_data[fmap['timeZone']] = station['tz'].zone

 
 

-    for elementCd in infoex['wx_data']:
-        if elementCd not in iemap:
-            LOG.warning("BAD KEY wx_data['%s']" % (elementCd))
+    for element_cd in infoex['wx_data']:
+        if element_cd not in iemap:
+            LOG.warning("BAD KEY wx_data['%s']", element_cd)

             continue
 
             continue
 

+        if infoex['wx_data'][element_cd] is None:
+            continue
+
+        # do the conversion before the rounding
+        if station['provider'] == 'nrcs' and station['units'] == 'metric':
+            infoex['wx_data'][element_cd] = convert_nrcs_units_to_metric(element_cd, infoex['wx_data'][element_cd])
+
+        # Massage precision of certain values to fit InfoEx's
+        # expectations
+        #
+        # 0 decimal places: relative humidity, wind speed, wind
+        #                   direction, wind gust, snow depth
+        # 1 decimal place:  air temp, baro
+        # Avoid transforming None values
+        if element_cd in ['wind_speed', 'WSPD', 'wind_direction',
+                          'RHUM', 'relative_humidity', 'WDIR',
+                          'wind_gust', 'SNWD', 'snow_depth']:
+            infoex['wx_data'][element_cd] = round(infoex['wx_data'][element_cd])
+        elif element_cd in ['TOBS', 'air_temp', 'PRES', 'pressure']:
+            infoex['wx_data'][element_cd] = round(infoex['wx_data'][element_cd], 1)
+        elif element_cd in ['PREC', 'precip_accum']:
+            infoex['wx_data'][element_cd] = round(infoex['wx_data'][element_cd], 2)
+

         # CONSIDER: Casting every value to Float() -- need to investigate if
         #           any possible elementCds we may want are any other data
         #           type than float.
         # CONSIDER: Casting every value to Float() -- need to investigate if
         #           any possible elementCds we may want are any other data
         #           type than float.


@@ -236,17 +308,18 @@ def main():
         #           storedUnitCd. But that's pretty network-intensive and
         #           may not even be worth it if there's only e.g. one or two
         #           exceptions to any otherwise uniformly Float value set.
         #           storedUnitCd. But that's pretty network-intensive and
         #           may not even be worth it if there's only e.g. one or two
         #           exceptions to any otherwise uniformly Float value set.

-        final_data[fmap[iemap[elementCd]]] = infoex['wx_data'][elementCd]
+        final_data[fmap[iemap[element_cd]]] = infoex['wx_data'][element_cd]

 
 

-    LOG.debug("final_data: %s" % (str(final_data)))
+    LOG.debug("final_data: %s", str(final_data))

 
 

-    if not write_local_csv(infoex['csv_filename'], final_data):
-        LOG.warning('Could not write local CSV file: %s',
-                    infoex['csv_filename'])
-        return 1;
+    if infoex['wx_data']:
+        if not write_local_csv(infoex['csv_filename'], final_data):
+            LOG.warning('Could not write local CSV file: %s',
+                        infoex['csv_filename'])
+            return 1

 
 

-    if not options.dry_run:
-        upload_csv(infoex['csv_filename'], infoex)
+        if not options.dry_run:
+            upload_csv(infoex['csv_filename'], infoex)

 
     LOG.debug('DONE')
     return 0
 
     LOG.debug('DONE')
     return 0


@@ -257,16 +330,17 @@ def setup_infoex_fields_mapping(location_uuid):
     Create a mapping of InfoEx fields to the local data's indexing scheme.
 
     INFOEX FIELDS
     Create a mapping of InfoEx fields to the local data's indexing scheme.
 
     INFOEX FIELDS

-    
+

     This won't earn style points in Python, but here we establish a couple
     of helpful mappings variables. The reason this is helpful is that the
     end result is simply an ordered set, the CSV file. But we still may
     want to manipulate the values arbitrarily before writing that file.
     This won't earn style points in Python, but here we establish a couple
     of helpful mappings variables. The reason this is helpful is that the
     end result is simply an ordered set, the CSV file. But we still may
     want to manipulate the values arbitrarily before writing that file.

-    
+

     Also note that the current Auto Wx InfoEx documentation shows these
     keys in a graphical table with the "index" beginning at 1, but here we
     sanely index beginning at 0.
     """
     Also note that the current Auto Wx InfoEx documentation shows these
     keys in a graphical table with the "index" beginning at 1, but here we
     sanely index beginning at 0.
     """

+    # pylint: disable=too-many-statements,multiple-statements,bad-whitespace

     fmap = {}                           ; final_data     = [None] * 29
     fmap['Location UUID'] = 0           ; final_data[0]  = location_uuid
     fmap['obDate'] = 1                  ; final_data[1]  = None
     fmap = {}                           ; final_data     = [None] * 29
     fmap['Location UUID'] = 0           ; final_data[0]  = location_uuid
     fmap['obDate'] = 1                  ; final_data[1]  = None


@@ -310,6 +384,8 @@ def setup_infoex_counterparts_mapping(provider):
     if provider == 'nrcs':
         iemap['PREC'] = 'precipitationGauge'
         iemap['TOBS'] = 'tempPres'
     if provider == 'nrcs':
         iemap['PREC'] = 'precipitationGauge'
         iemap['TOBS'] = 'tempPres'

+        iemap['TMAX'] = 'tempMaxHour'
+        iemap['TMIN'] = 'tempMinHour'

         iemap['SNWD'] = 'hS'
         iemap['PRES'] = 'baro'
         iemap['RHUM'] = 'rH'
         iemap['SNWD'] = 'hS'
         iemap['PRES'] = 'baro'
         iemap['RHUM'] = 'rH'


@@ -320,12 +396,26 @@ def setup_infoex_counterparts_mapping(provider):
     elif provider == 'mesowest':
         iemap['precip_accum'] = 'precipitationGauge'
         iemap['air_temp'] = 'tempPres'
     elif provider == 'mesowest':
         iemap['precip_accum'] = 'precipitationGauge'
         iemap['air_temp'] = 'tempPres'

+        iemap['air_temp_high_24_hour'] = 'tempMaxHour'
+        iemap['air_temp_low_24_hour'] = 'tempMinHour'

         iemap['snow_depth'] = 'hS'
         iemap['pressure'] = 'baro'
         iemap['relative_humidity'] = 'rH'
         iemap['wind_speed'] = 'windSpeedNum'
         iemap['wind_direction'] = 'windDirectionNum'
         iemap['wind_gust'] = 'windGustSpeedNum'
         iemap['snow_depth'] = 'hS'
         iemap['pressure'] = 'baro'
         iemap['relative_humidity'] = 'rH'
         iemap['wind_speed'] = 'windSpeedNum'
         iemap['wind_direction'] = 'windDirectionNum'
         iemap['wind_gust'] = 'windGustSpeedNum'

+    elif provider == 'python':
+        # we expect Python programs to use the InfoEx data type names
+        iemap['precipitationGauge'] = 'precipitationGauge'
+        iemap['tempPres'] = 'tempPres'
+        iemap['tempMaxHour'] = 'tempMaxHour'
+        iemap['tempMinHour'] = 'tempMinHour'
+        iemap['hS'] = 'hS'
+        iemap['baro'] = 'baro'
+        iemap['rH'] = 'rH'
+        iemap['windSpeedNum'] = 'windSpeedNum'
+        iemap['windDirectionNum'] = 'windDirectionNum'
+        iemap['windGustSpeedNum'] = 'windGustSpeedNum'

 
     return iemap
 
 
     return iemap
 


@@ -333,22 +423,27 @@ def setup_infoex_counterparts_mapping(provider):
 def get_nrcs_data(begin, end, station):
     """get the data we're after from the NRCS WSDL"""
     transport = zeep.transports.Transport(cache=zeep.cache.SqliteCache())
 def get_nrcs_data(begin, end, station):
     """get the data we're after from the NRCS WSDL"""
     transport = zeep.transports.Transport(cache=zeep.cache.SqliteCache())

+    transport.session.verify = False

     client = zeep.Client(wsdl=station['source'], transport=transport)
     remote_data = {}
 
     client = zeep.Client(wsdl=station['source'], transport=transport)
     remote_data = {}
 

-    for elementCd in station['desired_data']:
+    # massage begin/end date format
+    begin_date_str = begin.strftime('%Y-%m-%d %H:%M:00')
+    end_date_str = end.strftime('%Y-%m-%d %H:%M:00')
+
+    for element_cd in station['desired_data']:

         time_element = time.time()
 
         time_element = time.time()
 

-        # get the last three hours of data for this elementCd
+        # get the last three hours of data for this elementCd/element_cd

         tmp = client.service.getHourlyData(
         tmp = client.service.getHourlyData(

-                stationTriplets=[station['station_id']],
-                elementCd=elementCd,
-                ordinal=1,
-                beginDate=begin,
-                endDate=end)
+            stationTriplets=[station['station_id']],
+            elementCd=element_cd,
+            ordinal=1,
+            beginDate=begin_date_str,
+            endDate=end_date_str)

 
 

-        LOG.info("Time to get elementCd '%s': %.3f sec" % (elementCd,
-            time.time() - time_element))
+        LOG.info("Time to get NRCS elementCd '%s': %.3f sec", element_cd,
+                 time.time() - time_element)

 
         values = tmp[0]['values']
 
 
         values = tmp[0]['values']
 


@@ -359,9 +454,9 @@ def get_nrcs_data(begin, end, station):
         #       so perhaps this decision will be re-evaluated in the future
         if values:
             ordered = sorted(values, key=lambda t: t['dateTime'], reverse=True)
         #       so perhaps this decision will be re-evaluated in the future
         if values:
             ordered = sorted(values, key=lambda t: t['dateTime'], reverse=True)

-            remote_data[elementCd] = ordered[0]['value']
+            remote_data[element_cd] = ordered[0]['value']

         else:
         else:

-            remote_data[elementCd] = None
+            remote_data[element_cd] = None

 
     return remote_data
 
 
     return remote_data
 


@@ -375,7 +470,12 @@ def get_mesowest_data(begin, end, station):
 
     # construct final, completed API URL
     api_req_url = station['source'] + '&start=' + begin_date_str + '&end=' + end_date_str
 
     # construct final, completed API URL
     api_req_url = station['source'] + '&start=' + begin_date_str + '&end=' + end_date_str

-    req = requests.get(api_req_url)
+
+    try:
+        req = requests.get(api_req_url)
+    except requests.exceptions.ConnectionError:
+        LOG.error("Could not connect to '%s'", api_req_url)
+        sys.exit(1)

 
     try:
         json = req.json()
 
     try:
         json = req.json()


@@ -385,13 +485,24 @@ def get_mesowest_data(begin, end, station):
 
     try:
         observations = json['STATION'][0]['OBSERVATIONS']
 
     try:
         observations = json['STATION'][0]['OBSERVATIONS']

-    except ValueError:
-        LOG.error("Bad JSON in MesoWest response")
+    except KeyError as exc:
+        LOG.error("Unexpected JSON in MesoWest response: '%s'", exc)
+        sys.exit(1)
+    except IndexError as exc:
+        LOG.error("Unexpected JSON in MesoWest response: '%s'", exc)
+        try:
+            LOG.error("Detailed MesoWest response: '%s'",
+                      json['SUMMARY']['RESPONSE_MESSAGE'])
+        except KeyError:
+            pass
+        sys.exit(1)
+    except ValueError as exc:
+        LOG.error("Bad JSON in MesoWest response: '%s'", exc)

         sys.exit(1)
 
     pos = len(observations['date_time']) - 1
 
         sys.exit(1)
 
     pos = len(observations['date_time']) - 1
 

-    for elementCd in station['desired_data'].split(','):
+    for element_cd in station['desired_data'].split(','):

         # sort and isolate the most recent, see note above in NRCS for how and
         # why this is done
         #
         # sort and isolate the most recent, see note above in NRCS for how and
         # why this is done
         #


@@ -406,14 +517,25 @@ def get_mesowest_data(begin, end, station):
         #       irregularities
 
         # we may not have the data at all
         #       irregularities
 
         # we may not have the data at all

-        key_name = elementCd + '_set_1'
+        key_name = element_cd + '_set_1'
+

         if key_name in observations:
             if observations[key_name][pos]:
         if key_name in observations:
             if observations[key_name][pos]:

-                remote_data[elementCd] = observations[key_name][pos]
+                remote_data[element_cd] = observations[key_name][pos]
+
+                # mesowest by default provides wind_speed in m/s, but
+                # we specify 'english' units in the request; either way,
+                # we want mph
+                if element_cd in ('wind_speed', 'wind_gust'):
+                    remote_data[element_cd] = kn_to_mph(remote_data[element_cd])
+
+                # mesowest provides HS in mm, not cm; we want cm
+                if element_cd == 'snow_depth' and station['units'] == 'metric':
+                    remote_data[element_cd] = mm_to_cm(remote_data[element_cd])

             else:
             else:

-                remote_data[elementCd] = None
+                remote_data[element_cd] = None

         else:
         else:

-            remote_data[elementCd] = None
+            remote_data[element_cd] = None

 
     return remote_data
 
 
     return remote_data
 


@@ -422,34 +544,45 @@ def switch_units_to_metric(data_map, mapping):
 
     # NOTE: to update this, use the fmap<->final_data mapping laid out
     #       in setup_infoex_fields_mapping ()
 
     # NOTE: to update this, use the fmap<->final_data mapping laid out
     #       in setup_infoex_fields_mapping ()

-    #
-    # NOTE: this only 'works' with MesoWest for now, as the MesoWest API
-    #       itself handles the unit conversion; in the future, we will also
-    #       support NRCS unit conversion, but this must be done by this
-    #       program.
+    data_map[mapping['tempMaxHourUnit']] = 'C'
+    data_map[mapping['tempMinHourUnit']] = 'C'

     data_map[mapping['tempPresUnit']] = 'C'
     data_map[mapping['tempPresUnit']] = 'C'

-    data_map[mapping['hsUnit']] = 'm'
+    data_map[mapping['precipitationGaugeUnit']] = 'mm'
+    data_map[mapping['hsUnit']] = 'cm'

     data_map[mapping['windSpeedUnit']] = 'm/s'
     data_map[mapping['windGustSpeedNumUnit']] = 'm/s'
     data_map[mapping['windSpeedUnit']] = 'm/s'
     data_map[mapping['windGustSpeedNumUnit']] = 'm/s'

+    data_map[mapping['dewPointUnit']] = 'C'
+    data_map[mapping['hn24AutoUnit']] = 'cm'
+    data_map[mapping['hstAutoUnit']] = 'cm'

 
     return data_map
 
 
     return data_map
 

+def convert_nrcs_units_to_metric(element_cd, value):
+    """convert NRCS values from English to metric"""
+    if element_cd == 'TOBS':
+        value = f_to_c(value)
+    elif element_cd == 'SNWD':
+        value = in_to_cm(value)
+    elif element_cd == 'PREC':
+        value = in_to_mm(value)
+    return value
+

 # CSV operations
 def write_local_csv(path_to_file, data):
     """Write the specified CSV file to disk"""
 # CSV operations
 def write_local_csv(path_to_file, data):
     """Write the specified CSV file to disk"""

-    with open(path_to_file, 'w') as f:
+    with open(path_to_file, 'w') as file_object:

         # The requirement is that empty values are represented in the CSV
         # file as "", csv.QUOTE_NONNUMERIC achieves that
         # The requirement is that empty values are represented in the CSV
         # file as "", csv.QUOTE_NONNUMERIC achieves that

-        LOG.debug("writing CSV file '%s'" % (path_to_file))
-        writer = csv.writer(f, quoting=csv.QUOTE_NONNUMERIC)
+        LOG.debug("writing CSV file '%s'", path_to_file)
+        writer = csv.writer(file_object, quoting=csv.QUOTE_NONNUMERIC)

         writer.writerow(data)
         writer.writerow(data)

-        f.close()
+        file_object.close()

     return True
 
 def upload_csv(path_to_file, infoex_data):
     """Upload the specified CSV file to InfoEx FTP and remove the file"""
     with open(path_to_file, 'rb') as file_object:
     return True
 
 def upload_csv(path_to_file, infoex_data):
     """Upload the specified CSV file to InfoEx FTP and remove the file"""
     with open(path_to_file, 'rb') as file_object:

-        LOG.debug("uploading FTP file '%s'" % (infoex_data['host']))
+        LOG.debug("uploading FTP file '%s'", infoex_data['host'])

         ftp = FTP(infoex_data['host'], infoex_data['uuid'],
                   infoex_data['api_key'])
         ftp.storlines('STOR ' + path_to_file, file_object)
         ftp = FTP(infoex_data['host'], infoex_data['uuid'],
                   infoex_data['api_key'])
         ftp.storlines('STOR ' + path_to_file, file_object)


@@ -458,15 +591,47 @@ def upload_csv(path_to_file, infoex_data):
     os.remove(path_to_file)
 
 # other miscellaneous routines
     os.remove(path_to_file)
 
 # other miscellaneous routines

-def setup_time_values():
+def setup_time_values(station):

     """establish time bounds of data request(s)"""
     """establish time bounds of data request(s)"""

+
+    # default timezone to UTC (for MesoWest)
+    tz = pytz.utc
+
+    # but for NRCS, use the config-specified timezone
+    if station['provider'] == 'nrcs':
+        tz = station['tz']
+

     # floor time to nearest hour
     # floor time to nearest hour

-    dt = datetime.datetime.now()
-    end_date = dt - datetime.timedelta(minutes=dt.minute % 60,
-                                       seconds=dt.second,
-                                       microseconds=dt.microsecond)
+    date_time = datetime.datetime.now(tz=tz)
+    end_date = date_time - datetime.timedelta(minutes=date_time.minute % 60,
+                                              seconds=date_time.second,
+                                              microseconds=date_time.microsecond)

     begin_date = end_date - datetime.timedelta(hours=3)
     return (begin_date, end_date)
 
     begin_date = end_date - datetime.timedelta(hours=3)
     return (begin_date, end_date)
 

+def f_to_c(f):
+    """convert Fahrenheit to Celsius"""
+    return (float(f) - 32) * 5.0/9.0
+
+def in_to_cm(inches):
+    """convert inches to centimetrs"""
+    return float(inches) * 2.54
+
+def in_to_mm(inches):
+    """convert inches to millimeters"""
+    return (float(inches) * 2.54) * 10.0
+
+def ms_to_mph(ms):
+    """convert meters per second to miles per hour"""
+    return ms * 2.236936
+
+def kn_to_mph(kn):
+    """convert knots to miles per hour"""
+    return kn * 1.150779
+
+def mm_to_cm(mm):
+    """convert millimeters to centimetrs"""
+    return mm / 10.0
+

 if __name__ == "__main__":
     sys.exit(main())
 if __name__ == "__main__":
     sys.exit(main())