如何从python中的字典中提取特定值 [英] How to extract a specific value from a dictionary in python

问题描述

我想从Python中的Google距离矩阵API中提取距离.它返回的对象是python字典.

I want to extract distance from google distance matrix API in Python. The objet it returned is a python dictionary.

{
    'destination_addresses': [Mumbai, Maharashtra, India '],
        'origin_addresses': ['Powai, Mumbai, Maharashtra, India'],
        'rows': [{
            'elements': [{
                'distance': {
                    'text': u '47.1 km',
                    'value': 47086
                },
                'duration': {
                    'text': '1 hour 17 mins',
                    'value': 4628
                },
                'status': 'OK'
            }]
        }],
        'status': 'OK'
    }

我想从上方提取距离和持续时间.我用过

I want to extract the distance and duration from above. I have used

distance = my_distance["rows"]
for a in distance:
    result = a["elements"]
    print result

它给了我

[{
    u 'duration': {
        u 'text': u '1 hour 17 mins', u 'value': 4628
    }, u 'distance': {
        u 'text': u '47.1 km', u 'value': 47086
    }, u 'status': u 'OK'
}]

现在如何提取持续时间(1小时17分钟)和距离(47.1公里)及其对应的值(4628和47086)

Now how to extract duration (1 hour 17 mins) and distance (47.1 km) and their corresponding values (4628 & 47086)

推荐答案

您可以简单地通过以下方式进行操作:

You may simply do it as:

print "time taken : ", d["rows"][0]["elements"][0]["duration"]["text"]
print "distance : ", d["rows"][0]["elements"][0]["distance"]["text"]
print "distance value : ", d["rows"][0]["elements"][0]["distance"]["value"]
print "duration value : ", d["rows"][0]["elements"][0]["duration"]["value"]

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