""" Purpose: provide weather forecast by accessing US Weather Service 
    Usage:   user provides a zipcode
    Output:  current forecast for that zipcode
"""

# get access to web-based data support
import url 

# set base weather.gov query
WEATHER_GOV_QUERY = "https://forecast.weather.gov/zipcity.php?inputstring="

# get zipcode of interest
reply = input( "Enter zipcode: " )
zipcode = reply.strip()

# set complete query link
link = WEATHER_GOV_QUERY + zipcode

# query weather.gov
page = url.get_contents( link )

# need to find the forecast within the page

# forecast delimiters
FRONT_DELIMITER = "<div class=\"col-sm-10 forecast-text\">"   # text preceding forecast
REAR_DELIMITER  = "</div>"                                    # text following forecast

# delimiter lengths
LENGTH_FRONT_DELIMITER = len( FRONT_DELIMITER )
LENGTH_REAR_DELIMITER  = len( REAR_DELIMITER )

# start by finding the forecast delimiters
front_index = ...
rear_index  = ...

#print( "front_index:", front_index )
#print( "rear_index:",  rear_index )

# get and print the forecast
forecast = page[ front_index : rear_index ]

print( zipcode, "forecast:", forecast )