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CHAPTER 13 exercises
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AbhishekMali21 authored Apr 28, 2019
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"# CHAPTER 13 exercises"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"**Exercise 1: Change either the www.py4e.com/code3/geojson.py or www.py4e.com/code3/geoxml.py\n",
"to print out the two-character country code from the retrieved data. Add error\n",
"checking so your program does not traceback if the country code is not there.\n",
"Once you have it working, search for “Atlantic Ocean” and make sure it can\n",
"handle locations that are not in any country.**"
]
},
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"text": [
"Enter location: Atlantic Ocean\n",
"Retrieving http://py4e-data.dr-chuck.net/json?address=Atlantic+Ocean&key=42\n",
"Retrieved 1228 characters\n",
"{\n",
" \"results\": [\n",
" {\n",
" \"address_components\": [\n",
" {\n",
" \"long_name\": \"Atlantic Ocean\",\n",
" \"short_name\": \"Atlantic Ocean\",\n",
" \"types\": [\n",
" \"establishment\",\n",
" \"natural_feature\"\n",
" ]\n",
" }\n",
" ],\n",
" \"formatted_address\": \"Atlantic Ocean\",\n",
" \"geometry\": {\n",
" \"bounds\": {\n",
" \"northeast\": {\n",
" \"lat\": 68.1962901,\n",
" \"lng\": 19.9970779\n",
" },\n",
" \"southwest\": {\n",
" \"lat\": -75.9725902,\n",
" \"lng\": -82.9931606\n",
" }\n",
" },\n",
" \"location\": {\n",
" \"lat\": -14.5994134,\n",
" \"lng\": -28.6731465\n",
" },\n",
" \"location_type\": \"APPROXIMATE\",\n",
" \"viewport\": {\n",
" \"northeast\": {\n",
" \"lat\": 68.1962901,\n",
" \"lng\": 19.9970779\n",
" },\n",
" \"southwest\": {\n",
" \"lat\": -75.9725902,\n",
" \"lng\": -82.9931606\n",
" }\n",
" }\n",
" },\n",
" \"place_id\": \"ChIJ_7hu48qBWgYRT1MQ81ciNKY\",\n",
" \"types\": [\n",
" \"establishment\",\n",
" \"natural_feature\"\n",
" ]\n",
" }\n",
" ],\n",
" \"status\": \"OK\"\n",
"}\n",
"lat -14.5994134 lng -28.6731465 code N/A\n",
"Atlantic Ocean\n",
"Enter location: Antartica\n",
"Retrieving http://py4e-data.dr-chuck.net/json?address=Antartica&key=42\n",
"Retrieved 1381 characters\n",
"{\n",
" \"results\": [\n",
" {\n",
" \"address_components\": [\n",
" {\n",
" \"long_name\": \"Antarctica\",\n",
" \"short_name\": \"Antarctica\",\n",
" \"types\": [\n",
" \"continent\",\n",
" \"establishment\",\n",
" \"natural_feature\"\n",
" ]\n",
" },\n",
" {\n",
" \"long_name\": \"Antarctica\",\n",
" \"short_name\": \"AQ\",\n",
" \"types\": [\n",
" \"country\",\n",
" \"political\"\n",
" ]\n",
" }\n",
" ],\n",
" \"formatted_address\": \"Antarctica\",\n",
" \"geometry\": {\n",
" \"bounds\": {\n",
" \"northeast\": {\n",
" \"lat\": -60.1086999,\n",
" \"lng\": 180\n",
" },\n",
" \"southwest\": {\n",
" \"lat\": -90,\n",
" \"lng\": -180\n",
" }\n",
" },\n",
" \"location\": {\n",
" \"lat\": -82.862752,\n",
" \"lng\": 135\n",
" },\n",
" \"location_type\": \"APPROXIMATE\",\n",
" \"viewport\": {\n",
" \"northeast\": {\n",
" \"lat\": -28.2602827,\n",
" \"lng\": 130.581566\n",
" },\n",
" \"southwest\": {\n",
" \"lat\": -89.34771769999999,\n",
" \"lng\": -155.2387406\n",
" }\n",
" }\n",
" },\n",
" \"place_id\": \"ChIJ4Ql4Koj_nbARx8fIXTgKjbA\",\n",
" \"types\": [\n",
" \"continent\",\n",
" \"establishment\",\n",
" \"natural_feature\"\n",
" ]\n",
" }\n",
" ],\n",
" \"status\": \"OK\"\n",
"}\n",
"lat -82.862752 lng 135 code N/A\n",
"Antarctica\n"
]
}
],
"source": [
"import urllib.request, urllib.parse, urllib.error\n",
"import json\n",
"import ssl\n",
"api_key = False\n",
"\n",
"# If you have a Google Places API key, enter it here\n",
"# api_key = 'AIzaSy___IDByT70'\n",
"# https://developers.google.com/maps/documentation/geocoding/intro\n",
"\n",
"if api_key is False:\n",
" api_key = 42\n",
" serviceurl = 'http://py4e-data.dr-chuck.net/json?'\n",
"else :\n",
" serviceurl = 'https://maps.googleapis.com/maps/api/geocode/json?'\n",
"\n",
"# Ignore SSL certificate errors\n",
"ctx = ssl.create_default_context()\n",
"ctx.check_hostname = False\n",
"ctx.verify_mode = ssl.CERT_NONE\n",
"\n",
"while True:\n",
" address = input('Enter location: ')\n",
" if len(address) < 1: break\n",
"\n",
" parms = dict()\n",
" parms['address'] = address\n",
" if api_key is not False: parms['key'] = api_key\n",
" url = serviceurl + urllib.parse.urlencode(parms)\n",
"\n",
" print('Retrieving', url)\n",
" uh = urllib.request.urlopen(url, context=ctx)\n",
" data = uh.read().decode()\n",
" print('Retrieved', len(data), 'characters')\n",
"\n",
" try:\n",
" js = json.loads(data)\n",
" except:\n",
" js = None\n",
" \n",
" if not js or 'status' not in js or js['status'] != 'OK':\n",
" print('==== Failure To Retrieve ====')\n",
" print(data)\n",
" continue\n",
"\n",
" print(json.dumps(js, indent=4))\n",
"\n",
" lat = js['results'][0]['geometry']['location']['lat']\n",
" lng = js['results'][0]['geometry']['location']['lng']\n",
" try:\n",
" shname = js['results'][0]['address_components'][3]['short_name']\n",
" except:\n",
" shname = 'N/A'\n",
" print('lat', lat, 'lng', lng, 'code', shname)\n",
" location = js['results'][0]['formatted_address']\n",
" print(location)"
]
}
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