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sample.py
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sample.py
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#!/usr/bin/env python
#
# This is a minimal sample script showing how the individual data
# are accessed from the decoded report. To produce the standard text
# summary of a report, the string() method of the Metar object.
#
# The parsed data are stored as attributes of a Metar object.
# Individual attributes are either strings. instances of one of the
# metar.Datatypes classes, or lists of tuples of these scalars.
# Here's a summary, adapted from the comments in the Metar.Metar.__init__()
# method:
#
# Attribute Comments [data type]
# -------------- --------------------
# code original METAR code [string]
# type METAR (routine) or SPECI (special) [string]
# mod AUTO (automatic) or COR (corrected) [string]
# station_id 4-character ICAO station code [string]
# time observation time [datetime]
# cycle observation cycle (0-23) [int]
# wind_dir wind direction [direction]
# wind_speed wind speed [speed]
# wind_gust wind gust speed [speed]
# wind_dir_from beginning of range for win dir [direction]
# wind_dir_to end of range for wind dir [direction]
# vis visibility [distance]
# vis_dir visibility direction [direction]
# max_vis visibility [distance]
# max_vis_dir visibility direction [direction]
# temp temperature (C) [temperature]
# dewpt dew point (C) [temperature]
# press barometric pressure [pressure]
# runway runway visibility [list of tuples...]
# name [string]
# low [distance]
# high [distance]
# weather present weather [list of tuples...]
# intensity [string]
# description [string]
# precipitation [string]
# obscuration [string]
# other [string]
# recent recent weather [list of tuples...]
# sky sky conditions [list of tuples...]
# cover [string]
# height [distance]
# cloud [string]
# windshear runways w/ wind shear [list of strings]
#
# press_sea_level sea-level pressure [pressure]
# wind_speed_peak peak wind speed in last hour [speed]
# wind_dir_peak direction of peak wind speed in last hour [direction]
# max_temp_6hr max temp in last 6 hours [temperature]
# min_temp_6hr min temp in last 6 hours [temperature]
# max_temp_24hr max temp in last 24 hours [temperature]
# min_temp_24hr min temp in last 24 hours [temperature]
# precip_1hr precipitation over the last hour [precipitation]
# precip_3hr precipitation over the last 3 hours [precipitation]
# precip_6hr precipitation over the last 6 hours [precipitation]
# precip_24hr precipitation over the last 24 hours [precipitation]
#
# _remarks remarks [list of strings]
# _unparsed unparsed remarks [list of strings]
#
# The metar.Datatypes classes (temperature, pressure, precipitation,
# speed, direction) describe an observation and its units. They provide
# value() and string() methods to that return numerical and string
# representations of the data in any of a number of supported units.
#
# (You're going to have to study the source code for more details,
# like the available methods and supported unit conversions for the
# metar.Datatypes objects, etc..)
# In particular, look at the Metar.string()
# method, and the functions it calls.
#
# Feb 4, 2005
# Tom Pollard
#
from metar import Metar
# A sample METAR report
code = "METAR KEWR 111851Z VRB03G19KT 2SM R04R/3000VP6000FT TSRA BR FEW015 BKN040CB BKN065 OVC200 22/22 A2987 RMK AO2 PK WND 29028/1817 WSHFT 1812 TSB05RAB22 SLP114 FRQ LTGICCCCG TS OHD AND NW-N-E MOV NE P0013 T02270215"
print "-----------------------------------------------------------------------"
print "METAR: ",code
print "-----------------------------------------------------------------------"
# Initialize a Metar object with the coded report
obs = Metar.Metar(code)
# Print the individual data
# The 'station_id' attribute is a string.
print "station: %s" % obs.station_id
if obs.type:
print "type: %s" % obs.report_type()
# The 'time' attribute is a datetime object
if obs.time:
print "time: %s" % obs.time.ctime()
# The 'temp' and 'dewpt' attributes are temperature objects
if obs.temp:
print "temperature: %s" % obs.temp.string("C")
if obs.dewpt:
print "dew point: %s" % obs.dewpt.string("C")
# The wind() method returns a string describing wind observations
# which may include speed, direction, variability and gusts.
if obs.wind_speed:
print "wind: %s" % obs.wind()
# The peak_wind() method returns a string describing the peak wind
# speed and direction.
if obs.wind_speed_peak:
print "wind: %s" % obs.peak_wind()
# The visibility() method summarizes the visibility observation.
if obs.vis:
print "visibility: %s" % obs.visibility()
# The runway_visual_range() method summarizes the runway visibility
# observations.
if obs.runway:
print "visual range: %s" % obs.runway_visual_range()
# The 'press' attribute is a pressure object.
if obs.press:
print "pressure: %s" % obs.press.string("mb")
# The 'precip_1hr' attribute is a precipitation object.
if obs.precip_1hr:
print "precipitation: %s" % obs.precip_1hr.string("in")
# The present_weather() method summarizes the weather description (rain, etc.)
print "weather: %s" % obs.present_weather()
# The sky_conditions() method summarizes the cloud-cover observations.
print "sky: %s" % obs.sky_conditions("\n ")
# The remarks() method describes the remark groups that were parsed, but
# are not available directly as Metar attributes. The precipitation,
# min/max temperature and peak wind remarks, for instance, are stored as
# attributes and won't be listed here.
if obs._remarks:
print "remarks:"
print "- "+obs.remarks("\n- ")
print "-----------------------------------------------------------------------\n"