python 2.7 - How to extract a value in a nested json source? -

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I'm trying to get the temperature from a JSN source. It is nested and I can not understand how a nested value is obtained from a JSN file or URL. Even my codes have come so far: 

  #! / Usr / bin / python import urllib2 import json f = urllib2.urlopen ('http://api.openweathermap.org/data/2.5/find?q=London&units=metric') json_string = f.read () parsed_json = Json.loads (json_string) temp = parsed_json ['list'] Print "The current temperature is:% s"% (temp) f.close ()   
 Now I can find all Value only once but do not have a special value (temporarily in my case) I like to get value without U'temp: if possible.   
 
 
  u'temp ' How does Python  Unicode  Represents the objects that the JS string is parsed in Python. What are you looking for?  
  print temp [0] ['main'] ['temp']   
 I do not know the structure of the API that you are calling, therefore it Can make quite a few assumptions, but it will give you raw temperatures.

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