HTTP requests and JSON parsing in Python

Question

I want to dynamically query Google Maps through the Google Directions API  As an example  this request calculates the route from Chicago  IL to Los Angeles  CA via two waypoints in Joplin  MO and Oklahoma City  OK   http   maps googleapis com maps api directions json origin Chicago IL amp destination Los Angeles CA amp waypoints Joplin MO Oklahoma City OK amp sensor false  It returns a result in the JSON format   How can I do this in Python  I want to send such a request  receive the result and parse it

User · Answer

Try this   import requests import json    Goole Maps API  link    http   maps googleapis com maps api directions json origin Chicago IL amp destination Los Angeles CA amp waypoints Joplin MO Oklahoma City OK amp sensor false     Request data from link as  str  data   requests get link  text    convert  str  to Json data   json loads data     Now you can access Json  for i in data  routes   0   legs   0   steps        lattitude   i  start location    lat       longitude   i  start location    lng       print          format lattitude  longitude

User · Answer

import urllib import json  url    http   maps googleapis com maps api directions json origin Chicago IL amp destination Los Angeles CA amp waypoints Joplin MO Oklahoma City OK amp sensor false  result   json load urllib urlopen url

User · Answer

The requests Python module takes care of both retrieving JSON data and decoding it  due to its builtin JSON decoder  Here is an example taken from the module s documentation    gt  gt  gt  import requests  gt  gt  gt  r   requests get  https   github com timeline json    gt  gt  gt  r json     u repository    u open issues   0  u url    https   github com       So there is no use of having to use some separate module for decoding JSON

User · Answer

Also for pretty Json on console    json dumps response json    indent 2    possible to use dumps with indent   Please import json

User · Answer

Use the requests library  pretty print the results so you can better locate the keys values you want to extract  and then use nested for loops to parse the data  In the example I extract step by step driving directions   import json  requests  pprint  url    http   maps googleapis com maps api directions json    params   dict      origin  Chicago IL       destination  Los Angeles CA       waypoints  Joplin MO Oklahoma City OK       sensor  false      data   requests get url url  params params  binary   data content output   json loads binary     test to see if the request was valid  print output  status      output all of the results  pprint pprint output     step-by-step directions for route in output  routes            for leg in route  legs                for step in leg  steps                    print step  html instructions

User · Answer

just import requests and use from json   method   source   requests get  quot url quot   json   print source   OR you can use this   import json urllib request data   urllib request urlopen  quot url quot   read   output   json loads data  print  output

User · Answer

I recommend using the awesome requests library   import requests  url    http   maps googleapis com maps api directions json   params   dict      origin  Chicago IL       destination  Los Angeles CA       waypoints  Joplin MO Oklahoma City OK       sensor  false     resp   requests get url url  params params  data   resp json     Check the JSON Response Content documentation below   JSON Response Content  https   requests readthedocs io en master user quickstart  json-response-content

User · Answer

requests has built-in  json   method  import requests requests get url  json

[python] HTTP requests and JSON parsing in Python

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