所有，我有以下嵌套字典（來自 JSON API 回應）。我想通過熊貓資料框訪問各個專案。
字典如下所示：
{'pagination': {'limit': 2, 'offset': 0, 'count': 2, 'total': 1474969}, 'data': [{'flight_date': '2022-10-12', 'flight_status': 'active', 'departure': {'airport': 'Tullamarine', 'timezone': 'Australia/Melbourne', 'iata': 'MEL', 'icao': 'YMML', 'terminal': '2', 'gate': '16', 'delay': 20, 'scheduled': '2022-10-12T00:50:00 00:00', 'estimated': '2022-10-12T00:50:00 00:00', 'actual': '2022-10-12T01:09:00 00:00', 'estimated_runway': '2022-10-12T01:09:00 00:00', 'actual_runway': '2022-10-12T01:09:00 00:00'}, 'arrival': {'airport': 'Hong Kong International', 'timezone': 'Asia/Hong_Kong', 'iata': 'HKG', 'icao': 'VHHH', 'terminal': '1', 'gate': None, 'baggage': None, 'delay': None, 'scheduled': '2022-10-12T06:55:00 00:00', 'estimated': '2022-10-12T06:55:00 00:00', 'actual': None, 'estimated_runway': None, 'actual_runway': None}, 'airline': {'name': 'Finnair', 'iata': 'AY', 'icao': 'FIN'}, 'flight': {'number': '5844', 'iata': 'AY5844', 'icao': 'FIN5844', 'codeshared': {'airline_name': 'cathay pacific', 'airline_iata': 'cx', 'airline_icao': 'cpa', 'flight_number': '178', 'flight_iata': 'cx178', 'flight_icao': 'cpa178'}}, 'aircraft': None, 'live': None}, {'flight_date': '2022-10-12', 'flight_status': 'active', 'departure': {'airport': 'Tullamarine', 'timezone': 'Australia/Melbourne', 'iata': 'MEL', 'icao': 'YMML', 'terminal': '2', 'gate': '5', 'delay': 25, 'scheduled': '2022-10-12T00:30:00 00:00', 'estimated': '2022-10-12T00:30:00 00:00', 'actual': '2022-10-12T00:55:00 00:00', 'estimated_runway': '2022-10-12T00:55:00 00:00', 'actual_runway': '2022-10-12T00:55:00 00:00'}, 'arrival': {'airport': 'Kuala Lumpur International Airport (klia)', 'timezone': 'Asia/Kuala_Lumpur', 'iata': 'KUL', 'icao': 'WMKK', 'terminal': '1', 'gate': None, 'baggage': None, 'delay': 3, 'scheduled': '2022-10-12T06:00:00 00:00', 'estimated': '2022-10-12T06:00:00 00:00', 'actual': None, 'estimated_runway': None, 'actual_runway': None}, 'airline': {'name': 'KLM', 'iata': 'KL', 'icao': 'KLM'}, 'flight': {'number': '4109', 'iata': 'KL4109', 'icao': 'KLM4109', 'codeshared': {'airline_name': 'malaysia airlines', 'airline_iata': 'mh', 'airline_icao': 'mas', 'flight_number': '128', 'flight_iata': 'mh128', 'flight_icao': 'mas128'}}, 'aircraft': None, 'live': None}]}
字典存盤在變數名 api_response 下。我正在使用以下代碼轉換為https://sparkbyexamples.com/pandas/pandas-convert-json-to-dataframe/中所述的資料框
我的代碼：
import boto3
import json
from datetime import datetime
import calendar
import random
import time
import requests
import pandas as pd
aircraftdata = ''
params = {
'access_key': 'KEY',
'limit': '2',
'flight_status':'active'
}
url = "http://api.aviationstack.com/v1/flights"
api_result = requests.get('http://api.aviationstack.com/v1/flights', params)
api_statuscode = api_result.status_code
api_response = api_result.json()
print (type(api_response)) #dictionary
print (api_response)
df = pd.DataFrame.from_dict(api_response, orient = 'index')
這會產生以下錯誤：
AttributeError: 'list' object has no attribute 'items'
我想為每個航班獲取一個資料框，其中包含實時資料：
flight_iata, live_latitude, live_longitude
AA1004, 36.2, -106.8
uj5u.com熱心網友回復：
df = pd.json_normalize(api_response["data"])
df = df[df.loc[:, df.columns.str.contains("live", case=False)].columns]
print(df)
live.updated live.latitude live.longitude live.altitude live.direction live.speed_horizontal live.speed_vertical live.is_ground
0 2019-12-12T10:00:00 00:00 36.2856 -106.807 8846.82 114.34 894.348 1.188 False
如果你想直播。從標題中您可以：
df.columns = df.columns.str.split(".").str[-1]
print(df)
updated latitude longitude altitude direction speed_horizontal speed_vertical is_ground
0 2019-12-12T10:00:00 00:00 36.2856 -106.807 8846.82 114.34 894.348 1.188 False
uj5u.com熱心網友回復：
考慮到所需的輸出，假設字典dic如下所示
dic = {
"pagination": {
"limit": 100,
"offset": 0,
"count": 100,
"total": 1669022
},
"data": [
{
"flight_date": "2019-12-12",
"flight_status": "active",
"departure": {
"airport": "San Francisco International",
"timezone": "America/Los_Angeles",
"iata": "SFO",
"icao": "KSFO",
"terminal": "2",
"gate": "D11",
"delay": 13,
"scheduled": "2019-12-12T04:20:00 00:00",
"estimated": "2019-12-12T04:20:00 00:00",
"actual": "2019-12-12T04:20:13 00:00",
"estimated_runway": "2019-12-12T04:20:13 00:00",
"actual_runway": "2019-12-12T04:20:13 00:00"
},
"arrival": {
"airport": "Dallas/Fort Worth International",
"timezone": "America/Chicago",
"iata": "DFW",
"icao": "KDFW",
"terminal": "A",
"gate": "A22",
"baggage": "A17",
"delay": 0,
"scheduled": "2019-12-12T04:20:00 00:00",
"estimated": "2019-12-12T04:20:00 00:00",
"actual": None,
"estimated_runway": None,
"actual_runway": None
},
"airline": {
"name": "American Airlines",
"iata": "AA",
"icao": "AAL"
},
"flight": {
"number": "1004",
"iata": "AA1004",
"icao": "AAL1004",
"codeshared": None
},
"aircraft": {
"registration": "N160AN",
"iata": "A321",
"icao": "A321",
"icao24": "A0F1BB"
},
"live": {
"updated": "2019-12-12T10:00:00 00:00",
"latitude": 36.28560000,
"longitude": -106.80700000,
"altitude": 8846.820,
"direction": 114.340,
"speed_horizontal": 894.348,
"speed_vertical": 1.188,
"is_ground": False
}
}
]
}
為了獲得所需的輸出，可以首先將字典轉換為資料框pandas.DataFrame
df = pd.DataFrame(dic['data'], columns=['flight', 'live'])
[Out]:
flight live
0 {'number': '1004', 'iata': 'AA1004', 'icao': '... {'updated': '2019-12-12T10:00:00 00:00', 'lati...
然后，可以使用.apply()自定義 lambda 函式，如下所示
df = df[['flight', 'live']].apply(lambda x: pd.Series([x['flight']['iata'], x['live']['latitude'], x['live']['longitude'], x['live']['altitude']]), axis=1)
[Out]:
0 1 2 3
0 AA1004 36.2856 -106.807 8846.82
最后，唯一缺少的是列的名稱。為了改變它，可以執行以下操作
df.columns = ['flight_iata', 'live_latitude', 'live_longitude', 'live_altitude']
[Out]:
flight_iata live_latitude live_longitude live_altitude
0 AA1004 36.2856 -106.807 8846.82
這就是期望的輸出。
轉載請註明出處，本文鏈接：https://www.uj5u.com/houduan/513797.html