metar using city

#!/usr/bin/python
import urllib2

r = 0
y = 1
incase = [ 'SKC','CLR','FEW','SCT','BKN','OVC']

def extract(icao):

    try:

        url = 'http://weather.noaa.gov/pub/data/observations/metar/stations/%s.TXT' %icao
        f = urllib2.urlopen(url)
        content = f.read()
        print content
        c = content.split()
        c.pop(0)
        c.pop(0)
        return c

    except urllib2.HTTPError:
        exit('sorry we are out of service. Please try again later.')



def data_decode(data):
    incase = range(0,10)
    weather_library = {'MI', 'BC', 'DR', 'BL', 'SH', 'TS', 'FZ', 'DZ', 'RA', 'SN', 'SG', 'IC', 'PL','GR', 'GS', 'UP', 'BR', 'FG', 'FU', 'VA','DU', 'SA', 'HZ', 'PY', 'PO', 'SQ', 'FC', 'SS', 'DS'}
    sky  = {'SKC','CLR','FEW','SCT', 'BKN', 'OVC' }
    print data
    assign =''
    for i in range(0,len(data)):
        if i <= 1:
            print globals()['Decoded_%d' % (int(i))](data[i])

    for i in range(2,len(data)):
        assign =data[i]
        if assign=='AUTO':
            print 'The report has been prepared by an automated observing system. '
            continue
        if assign[2:4]=='SM' or assign == '9999':
            print globals()['Decoded_%d' % (int(3))](data[i])
            continue
        if len(assign)==7:
            print globals()['Decoded_%d' % (int(2))](data[i])
            continue
        if assign[0:3] in sky:
            print globals()['Decoded_%d' % (int(5))](data[i])
            continue
        if assign[0:2] in weather_library:
            print globals()['Decoded_%d' % (int(4))](data[i])
            continue
        if assign[0] == 'A':
            print globals()['Decoded_%d' % (int(8))](data[i])
            break
        if assign[0] == 'Q' and r == 0:
            print globals()['Decoded_%d' % (int(7))](data[i])
            continue
        if int(assign[0]) in incase:
            print globals()['Decoded_%d' % (int(6))](data[i])
            continue




'''This is for finding the location of the station from the source:http://weather.rap.ucar.edu/surface/stations.txt'''
def Decoded_0(data_parts):
    url='http://weather.rap.ucar.edu/surface/stations.txt'
    f = urllib2.urlopen(url)
    content = f.read()
    c = content
    str(data_parts)
    start = c.find('CD  STATION ')
    c = c[start:len(c)]
    #print c

    if c.find(data_parts):
        end = c.find(data_parts)+63
        start = c.find(data_parts)-17
        found= c[start:end]
        print 'City::',found[0:17]
    else:
        print 'not found it'

'''This part is for decoding the date and time of the report taken. '''
def Decoded_1(data_parts):
    if (len(data_parts) == 7):
        print 'Date of report taken :', data_parts[0:2],'th of this month'
        print 'Time of report taken :', data_parts[2:4],':',data_parts[4:6]



'''This function decodes the wind condition from the given data codes'''
def Decoded_2(data_parts):
    if (data_parts == '00000KT'):
        print 'It will be calm, no winds.'

    if data_parts[0:3]=='VRB':
        print 'Direction of wind :', 'The direction of the wind is not determined.'
    else:
        print 'Direction of wind :', data_parts[0:3],'Degrees'
    if data_parts.find('G'):
        print 'Gust of air : ', data_parts[data_parts.find('G'):data_parts.find('KT')]
    else:
        print 'Gust of air : None'
    print 'Speed of air : ', data_parts[3:5],'knot.'


'''This function is to decode the data code for visibility  '''
def Decoded_3(data_parts):
    if data_parts == '9999':
        print 'Visibility is more clear than 30 miles.'
    else:
        end = data_parts.find('SM')
        print 'Visibility is',data_parts[0:end],'statute miles'


'''This function is for the weather condition report from the data code.'''
def Decoded_4(data_parts):
    intensity = ['-', '+']
    weather_library = {'MI' : 'Shallow',
                       'BC' :'Patches',
                       'DR' :'Low Drifting',
                       'BL' : 'Blowing',
                       'SH':'Showers',
                       'TS': 'Thunderstorm',
                       'FZ': 'Freezing',
                       'DZ' : 'Drizzle',
                       'RA' :'Rain',
                       'SN' : 'Snow',
                       'SG' : 'Snow Grains',
                       'IC' : 'Ice Crystals',
                       'PL' : 'Ice Pellets',
                       'GR' : 'Hail',
                       'GS' : 'Small Hail',
                       'UP' : 'Unknown Preciptation',
                       'BR' : 'Mist',
                       'FG': 'Fog',
                       'FU' : 'Smoke',
                       'VA' : 'Volcanic Ash',
                       'DU' : 'Widespread Dust',
                       'SA' : 'Sand',
                       'HZ' : 'Haze',
                       'PY' : 'Spray',
                       'PO' : 'Well-Developed Dust/Sand Whirls',
                       'SQ' : 'Squalls',
                       'FC' : 'Funnel Cloud Tornado Waterspout',
                       'SS' : 'Sandstorm',
                       'DS' :'Duststorm'
                       }
    output = ''
    condition=''
    if data_parts[0] in intensity:
        if data_parts[0] == '-':
            output = output + 'Light'
        elif data_parts[0] == '+':
            output = output + 'Heavy'
        else:
            output = output + 'Near the place'

    for i in range(1, len(data_parts)):
        try:
            int(data_parts[i])
        except ValueError:
            for x in range(i,len(data_parts)):
                if len(condition) == 2:
                    output += 'with '+ weather_library[condition]
                    condition = ''
                condition += data_parts[x]
    print output



'''This part decodes the condition for sky.'''
def Decoded_5(data_parts):
    sky_condition=[]
    sky  = {
        'SKC' : 'Clear',
        'CLR' : 'Clear (automated report)',
        'FEW' : 'Few clouds are in the sky but most part is clear',
        'SCT' : 'Clouds are scattered  all over the sky',
        'BKN' : 'Sky seems broken',
        'OVC' : 'sky is overcast',
        }
    print 'Sky condition:',sky[data_parts[0:3]],'after',data_parts[3:6]+' ft. of ceiling.'


'''This part is for the decoding the temperature and the dewpoint'''
def Decoded_6(data_parts):
    if data_parts[0]=='M':
        print 'Temperature is -%s' %data_parts[1:2],'degree Celsius'
    else:
        print 'Temperature is %s'%data_parts[0:2],'degree Celsius'
    if data_parts[3]=='M':
        print 'Dewpoint is -%s'%data_parts[4:6],'degree Celsius'
    else:
        print 'Dewpoint is %s'%data_parts[3:6],'degree Celsius'


'''This part decodes the pressure from the sea level '''
def Decoded_7(data_parts):
    print 'Pressure from sea level :%s' %data_parts[1:6],'hegta pascal'


'''This part returns the alimeter'''
def Decoded_8(data_parts):
    print 'Altimeter :%s' %data_parts[1:3]+'.%s "Hg'%data_parts[3:6]



'''This is for finding the ICAO of the station from the user input.'''
def find_by_city(data_parts):
    url='http://weather.rap.ucar.edu/surface/stations.txt'
    f = urllib2.urlopen(url)
    c = f.read()
    str(data_parts)
    start = c.find('CD  STATION ')
    c = c[start:len(c)]

    if c.find(data_parts):
        end = c.find(data_parts)+21
        start = c.find(data_parts)+17
        found= c[start:end]
        icao = found
        return extract(icao)
    else:
        print 'Cannot find it. Please try again.'
        pass

if __name__ == "__main__":
    report= raw_input('please enter the City::')
    report= report.upper()
    data = find_by_city(report)
    data_decode(data)