如何处理从Python请求库获取的JSON数据？
How do I handle JSON data obtained from request library in Python?
我对使用 API 键比较陌生。我试过 IG Markets API 并获得以下信息。通过使用 r.json()，我设法创建了类型（字典）。我想知道如何处理这种类型的数据并以“更好”的方式访问这些值。
我试过使用：
对于键，数据中的值（）：
打印（键，值）
和
数据[“位置”]
但似乎字典只包含一个键。感谢您的帮助！
data = r.json()
print(data)
{'positions': [{'market': {'bid': 1719.59,
'delayTime': 0,
'epic': '-',
'expiry': '-',
'high': 1749.95,
'instrumentName': 'Sverige30 Cash (100SK)',
'instrumentType': 'INDICES',
'lotSize': 100.0,
'low': 1713.33,
'marketStatus': 'TRADEABLE',
'netChange': -25.44,
'offer': 1721.09,
'percentageChange': -1.46,
'scalingFactor': 1,
'streamingPricesAvailable': True,
'updateTime': '22:15:16',
'updateTimeUTC': '21:15:16'},
'position': {'contractSize': 100.0,
'controlledRisk': False,
'createdDate': '2020/07/13 23:12:53:000',
'createdDateUTC': '2020-07-13T21:12:53',
'currency': 'USD',
'dealId': '',
'dealReference': '',
'direction': 'BUY',
'level': 1720.74,
'limitLevel': None,
'limitedRiskPremium': None,
'size': 5.0,
'stopLevel': None,
'trailingStep': None,
'trailingStopDistance': None}}]}
假设您的数据结构可以更大并且可能有多个 'positions'，您可以遍历 'positions' 并为每个位置检索 size，如下所示：
for pos in data['positions']:
size = pos['position']['size']
print(size)
打印：
5.0
- 示例中只有一条记录，所以我在
positions 中创建了一个包含多条记录的示例
- 我会使用 pandas 访问所有数据
import pandas as pd
# create dataframe
df = pd.json_normalize(data, 'positions')
# display(df)
market.bid market.delayTime market.epic market.expiry market.high market.instrumentName market.instrumentType market.lotSize market.low market.marketStatus market.netChange market.offer market.percentageChange market.scalingFactor market.streamingPricesAvailable market.updateTime market.updateTimeUTC position.contractSize position.controlledRisk position.createdDate position.createdDateUTC position.currency position.dealId position.dealReference position.direction position.level position.limitLevel position.limitedRiskPremium position.size position.stopLevel position.trailingStep position.trailingStopDistance
0 1719.59 0 - - 1749.95 Sverige30 Cash (100SK) INDICES 100.0 1713.33 TRADEABLE -25.44 1721.09 -1.46 1 True 22:15:16 21:15:16 100.0 False 2020/07/13 23:12:53:000 2020-07-13T21:12:53 USD BUY 1720.74 None None 5.0 None None None
1 1719.59 0 - - 1749.95 Sverige30 Cash (100SK) INDICES 100.0 1713.33 TRADEABLE -25.44 1721.09 -1.46 1 True 22:15:16 21:15:16 100.0 False 2020/07/13 23:12:53:000 2020-07-13T21:12:53 USD BUY 1720.74 None None 5.0 None None None
2 1719.59 0 - - 1749.95 Sverige30 Cash (100SK) INDICES 100.0 1713.33 TRADEABLE -25.44 1721.09 -1.46 1 True 22:15:16 21:15:16 100.0 False 2020/07/13 23:12:53:000 2020-07-13T21:12:53 USD BUY 1720.74 None None 5.0 None None None
3 1719.59 0 - - 1749.95 Sverige30 Cash (100SK) INDICES 100.0 1713.33 TRADEABLE -25.44 1721.09 -1.46 1 True 22:15:16 21:15:16 100.0 False 2020/07/13 23:12:53:000 2020-07-13T21:12:53 USD BUY 1720.74 None None 5.0 None None None
data 有多个记录
data = {
'positions': [{
'market': {
'bid': 1719.59,
'delayTime': 0,
'epic': '-',
'expiry': '-',
'high': 1749.95,
'instrumentName': 'Sverige30 Cash (100SK)',
'instrumentType': 'INDICES',
'lotSize': 100.0,
'low': 1713.33,
'marketStatus': 'TRADEABLE',
'netChange': -25.44,
'offer': 1721.09,
'percentageChange': -1.46,
'scalingFactor': 1,
'streamingPricesAvailable': True,
'updateTime': '22:15:16',
'updateTimeUTC': '21:15:16'
},
'position': {
'contractSize': 100.0,
'controlledRisk': False,
'createdDate': '2020/07/13 23:12:53:000',
'createdDateUTC': '2020-07-13T21:12:53',
'currency': 'USD',
'dealId': '',
'dealReference': '',
'direction': 'BUY',
'level': 1720.74,
'limitLevel': None,
'limitedRiskPremium': None,
'size': 5.0,
'stopLevel': None,
'trailingStep': None,
'trailingStopDistance': None
}
}, {
'market': {
'bid': 1719.59,
'delayTime': 0,
'epic': '-',
'expiry': '-',
'high': 1749.95,
'instrumentName': 'Sverige30 Cash (100SK)',
'instrumentType': 'INDICES',
'lotSize': 100.0,
'low': 1713.33,
'marketStatus': 'TRADEABLE',
'netChange': -25.44,
'offer': 1721.09,
'percentageChange': -1.46,
'scalingFactor': 1,
'streamingPricesAvailable': True,
'updateTime': '22:15:16',
'updateTimeUTC': '21:15:16'
},
'position': {
'contractSize': 100.0,
'controlledRisk': False,
'createdDate': '2020/07/13 23:12:53:000',
'createdDateUTC': '2020-07-13T21:12:53',
'currency': 'USD',
'dealId': '',
'dealReference': '',
'direction': 'BUY',
'level': 1720.74,
'limitLevel': None,
'limitedRiskPremium': None,
'size': 5.0,
'stopLevel': None,
'trailingStep': None,
'trailingStopDistance': None
}
}, {
'market': {
'bid': 1719.59,
'delayTime': 0,
'epic': '-',
'expiry': '-',
'high': 1749.95,
'instrumentName': 'Sverige30 Cash (100SK)',
'instrumentType': 'INDICES',
'lotSize': 100.0,
'low': 1713.33,
'marketStatus': 'TRADEABLE',
'netChange': -25.44,
'offer': 1721.09,
'percentageChange': -1.46,
'scalingFactor': 1,
'streamingPricesAvailable': True,
'updateTime': '22:15:16',
'updateTimeUTC': '21:15:16'
},
'position': {
'contractSize': 100.0,
'controlledRisk': False,
'createdDate': '2020/07/13 23:12:53:000',
'createdDateUTC': '2020-07-13T21:12:53',
'currency': 'USD',
'dealId': '',
'dealReference': '',
'direction': 'BUY',
'level': 1720.74,
'limitLevel': None,
'limitedRiskPremium': None,
'size': 5.0,
'stopLevel': None,
'trailingStep': None,
'trailingStopDistance': None
}
}, {
'market': {
'bid': 1719.59,
'delayTime': 0,
'epic': '-',
'expiry': '-',
'high': 1749.95,
'instrumentName': 'Sverige30 Cash (100SK)',
'instrumentType': 'INDICES',
'lotSize': 100.0,
'low': 1713.33,
'marketStatus': 'TRADEABLE',
'netChange': -25.44,
'offer': 1721.09,
'percentageChange': -1.46,
'scalingFactor': 1,
'streamingPricesAvailable': True,
'updateTime': '22:15:16',
'updateTimeUTC': '21:15:16'
},
'position': {
'contractSize': 100.0,
'controlledRisk': False,
'createdDate': '2020/07/13 23:12:53:000',
'createdDateUTC': '2020-07-13T21:12:53',
'currency': 'USD',
'dealId': '',
'dealReference': '',
'direction': 'BUY',
'level': 1720.74,
'limitLevel': None,
'limitedRiskPremium': None,
'size': 5.0,
'stopLevel': None,
'trailingStep': None,
'trailingStopDistance': None
}
}
]
}
我对使用 API 键比较陌生。我试过 IG Markets API 并获得以下信息。通过使用 r.json()，我设法创建了类型（字典）。我想知道如何处理这种类型的数据并以“更好”的方式访问这些值。
我试过使用： 对于键，数据中的值（）： 打印（键，值） 和 数据[“位置”] 但似乎字典只包含一个键。感谢您的帮助！
data = r.json()
print(data)
{'positions': [{'market': {'bid': 1719.59,
'delayTime': 0,
'epic': '-',
'expiry': '-',
'high': 1749.95,
'instrumentName': 'Sverige30 Cash (100SK)',
'instrumentType': 'INDICES',
'lotSize': 100.0,
'low': 1713.33,
'marketStatus': 'TRADEABLE',
'netChange': -25.44,
'offer': 1721.09,
'percentageChange': -1.46,
'scalingFactor': 1,
'streamingPricesAvailable': True,
'updateTime': '22:15:16',
'updateTimeUTC': '21:15:16'},
'position': {'contractSize': 100.0,
'controlledRisk': False,
'createdDate': '2020/07/13 23:12:53:000',
'createdDateUTC': '2020-07-13T21:12:53',
'currency': 'USD',
'dealId': '',
'dealReference': '',
'direction': 'BUY',
'level': 1720.74,
'limitLevel': None,
'limitedRiskPremium': None,
'size': 5.0,
'stopLevel': None,
'trailingStep': None,
'trailingStopDistance': None}}]}
假设您的数据结构可以更大并且可能有多个 'positions'，您可以遍历 'positions' 并为每个位置检索 size，如下所示：
for pos in data['positions']:
size = pos['position']['size']
print(size)
打印：
5.0
- 示例中只有一条记录，所以我在
positions 中创建了一个包含多条记录的示例
- 我会使用 pandas 访问所有数据
import pandas as pd
# create dataframe
df = pd.json_normalize(data, 'positions')
# display(df)
market.bid market.delayTime market.epic market.expiry market.high market.instrumentName market.instrumentType market.lotSize market.low market.marketStatus market.netChange market.offer market.percentageChange market.scalingFactor market.streamingPricesAvailable market.updateTime market.updateTimeUTC position.contractSize position.controlledRisk position.createdDate position.createdDateUTC position.currency position.dealId position.dealReference position.direction position.level position.limitLevel position.limitedRiskPremium position.size position.stopLevel position.trailingStep position.trailingStopDistance
0 1719.59 0 - - 1749.95 Sverige30 Cash (100SK) INDICES 100.0 1713.33 TRADEABLE -25.44 1721.09 -1.46 1 True 22:15:16 21:15:16 100.0 False 2020/07/13 23:12:53:000 2020-07-13T21:12:53 USD BUY 1720.74 None None 5.0 None None None
1 1719.59 0 - - 1749.95 Sverige30 Cash (100SK) INDICES 100.0 1713.33 TRADEABLE -25.44 1721.09 -1.46 1 True 22:15:16 21:15:16 100.0 False 2020/07/13 23:12:53:000 2020-07-13T21:12:53 USD BUY 1720.74 None None 5.0 None None None
2 1719.59 0 - - 1749.95 Sverige30 Cash (100SK) INDICES 100.0 1713.33 TRADEABLE -25.44 1721.09 -1.46 1 True 22:15:16 21:15:16 100.0 False 2020/07/13 23:12:53:000 2020-07-13T21:12:53 USD BUY 1720.74 None None 5.0 None None None
3 1719.59 0 - - 1749.95 Sverige30 Cash (100SK) INDICES 100.0 1713.33 TRADEABLE -25.44 1721.09 -1.46 1 True 22:15:16 21:15:16 100.0 False 2020/07/13 23:12:53:000 2020-07-13T21:12:53 USD BUY 1720.74 None None 5.0 None None None
data 有多个记录
data = {
'positions': [{
'market': {
'bid': 1719.59,
'delayTime': 0,
'epic': '-',
'expiry': '-',
'high': 1749.95,
'instrumentName': 'Sverige30 Cash (100SK)',
'instrumentType': 'INDICES',
'lotSize': 100.0,
'low': 1713.33,
'marketStatus': 'TRADEABLE',
'netChange': -25.44,
'offer': 1721.09,
'percentageChange': -1.46,
'scalingFactor': 1,
'streamingPricesAvailable': True,
'updateTime': '22:15:16',
'updateTimeUTC': '21:15:16'
},
'position': {
'contractSize': 100.0,
'controlledRisk': False,
'createdDate': '2020/07/13 23:12:53:000',
'createdDateUTC': '2020-07-13T21:12:53',
'currency': 'USD',
'dealId': '',
'dealReference': '',
'direction': 'BUY',
'level': 1720.74,
'limitLevel': None,
'limitedRiskPremium': None,
'size': 5.0,
'stopLevel': None,
'trailingStep': None,
'trailingStopDistance': None
}
}, {
'market': {
'bid': 1719.59,
'delayTime': 0,
'epic': '-',
'expiry': '-',
'high': 1749.95,
'instrumentName': 'Sverige30 Cash (100SK)',
'instrumentType': 'INDICES',
'lotSize': 100.0,
'low': 1713.33,
'marketStatus': 'TRADEABLE',
'netChange': -25.44,
'offer': 1721.09,
'percentageChange': -1.46,
'scalingFactor': 1,
'streamingPricesAvailable': True,
'updateTime': '22:15:16',
'updateTimeUTC': '21:15:16'
},
'position': {
'contractSize': 100.0,
'controlledRisk': False,
'createdDate': '2020/07/13 23:12:53:000',
'createdDateUTC': '2020-07-13T21:12:53',
'currency': 'USD',
'dealId': '',
'dealReference': '',
'direction': 'BUY',
'level': 1720.74,
'limitLevel': None,
'limitedRiskPremium': None,
'size': 5.0,
'stopLevel': None,
'trailingStep': None,
'trailingStopDistance': None
}
}, {
'market': {
'bid': 1719.59,
'delayTime': 0,
'epic': '-',
'expiry': '-',
'high': 1749.95,
'instrumentName': 'Sverige30 Cash (100SK)',
'instrumentType': 'INDICES',
'lotSize': 100.0,
'low': 1713.33,
'marketStatus': 'TRADEABLE',
'netChange': -25.44,
'offer': 1721.09,
'percentageChange': -1.46,
'scalingFactor': 1,
'streamingPricesAvailable': True,
'updateTime': '22:15:16',
'updateTimeUTC': '21:15:16'
},
'position': {
'contractSize': 100.0,
'controlledRisk': False,
'createdDate': '2020/07/13 23:12:53:000',
'createdDateUTC': '2020-07-13T21:12:53',
'currency': 'USD',
'dealId': '',
'dealReference': '',
'direction': 'BUY',
'level': 1720.74,
'limitLevel': None,
'limitedRiskPremium': None,
'size': 5.0,
'stopLevel': None,
'trailingStep': None,
'trailingStopDistance': None
}
}, {
'market': {
'bid': 1719.59,
'delayTime': 0,
'epic': '-',
'expiry': '-',
'high': 1749.95,
'instrumentName': 'Sverige30 Cash (100SK)',
'instrumentType': 'INDICES',
'lotSize': 100.0,
'low': 1713.33,
'marketStatus': 'TRADEABLE',
'netChange': -25.44,
'offer': 1721.09,
'percentageChange': -1.46,
'scalingFactor': 1,
'streamingPricesAvailable': True,
'updateTime': '22:15:16',
'updateTimeUTC': '21:15:16'
},
'position': {
'contractSize': 100.0,
'controlledRisk': False,
'createdDate': '2020/07/13 23:12:53:000',
'createdDateUTC': '2020-07-13T21:12:53',
'currency': 'USD',
'dealId': '',
'dealReference': '',
'direction': 'BUY',
'level': 1720.74,
'limitLevel': None,
'limitedRiskPremium': None,
'size': 5.0,
'stopLevel': None,
'trailingStep': None,
'trailingStopDistance': None
}
}
]
}