-1

我是使用 Google 距离矩阵 API 的新手，我不断收到以下错误“KeyError：'距离'”，而不是距离值。类似问题的所有解决方案似乎都符合我正在使用的代码，其中列表“行”和“元素”中的第一项使用索引 [0] 访问，然后是“距离”和“值”项像字典一样访问。

这是相关的代码块：

# Loop through each row in the data frame using pairwise for (i1, row1), (i2, row2) in pairwise(df.iterrows()):

#Assign latitude and longitude as origin/departure points
  LatOrigin = row1["latitude"]
  LongOrigin = row1["longitude"]
  origins = (LatOrigin,LongOrigin)

  #Assign latitude and longitude from the next row as the destination point
  LatDest = row2["latitude"]   # Save value as lat
  LongDest = row2["longitude"]  # Save value as lat
  destination = (LatDest,LongDest)

  #pass origin and destination variables to distance_matrix function# output in meters
  result = gmaps.distance_matrix(origins, destination, mode='walking')["rows"][0]["elements"][0]['distance']["value"]

  #append result to list
  list.append(result)

这是我期望的 JSON 有效负载的格式：

    {
  "originAddresses": [ "Greenwich, Greater London, UK", "13 Great Carleton Square, Edinburgh, City of Edinburgh EH16 4, UK" ],
  "destinationAddresses": [ "Stockholm County, Sweden", "Dlouhá 609/2, 110 00 Praha-Staré Město, Česká republika" ],
  "rows": [ {
    "elements": [ {
      "status": "OK",
      "duration": {
        "value": 70778,
        "text": "19 hours 40 mins"
      },
      "distance": {
        "value": 1887508,
        "text": "1173 mi"
      }
    }, {
      "status": "OK",
      "duration": {
        "value": 44476,
        "text": "12 hours 21 mins"
      },
      "distance": {
        "value": 1262780,
        "text": "785 mi"
      }
    } ]
  }, {
    "elements": [ {
      "status": "OK",
      "duration": {
        "value": 96000,
        "text": "1 day 3 hours"
      },
      "distance": {
        "value": 2566737,
        "text": "1595 mi"
      }
    }, {
      "status": "OK",
      "duration": {
        "value": 69698,
        "text": "19 hours 22 mins"
      },
      "distance": {
        "value": 1942009,
        "text": "1207 mi"
      }
    } ]
  } ]
}
4

1 回答 1

0

当我"KeyError: 'distance'"的距离矩阵请求返回{'status': 'ZERO_RESULTS'}. 得到这个结果表明结果中没有Distance，因此它会抛出 KeyError。ZERO_RESULTS表示在起点和终点之间找不到路由。当您遇到此问题时，请检查您通过的坐标，因为这些坐标之间可能没有路线。

以下是零结果示例的代码片段：

import googlemaps

LatOrigin = 0
LongOrigin = 0
origins = (LatOrigin,LongOrigin)

  #Assign latitude and longitude from the next row as the destination point
LatDest = 40.6905615
  # Save value as lat
LongDest = -73.9976592
# Save value as lat
destination = (LatDest,LongDest)

gmaps = googlemaps.Client(key='YOUR_KEY') 

result = gmaps.distance_matrix(origins, destination, mode='walking')
print(result)

当您将结果值更改为此时，您可以看到 KeyError：result = gmaps.distance_matrix(origins, destination, mode='walking')["rows"][0]["elements"][0]['distance']["value"]

这是一个示例，其中坐标之间有一条路线，从而获得了距离值：

import googlemaps

LatOrigin = 40.6655101
LongOrigin = -73.89188969999998
origins = (LatOrigin,LongOrigin)

  #Assign latitude and longitude from the next row as the destination point
LatDest = 40.6905615
  # Save value as lat
LongDest = -73.9976592
# Save value as lat
destination = (LatDest,LongDest)

gmaps = googlemaps.Client(key='YOUR_KEY') 

result = gmaps.distance_matrix(origins, destination, mode='walking')["rows"][0]["elements"][0]['distance']["value"]
print('distance',result)
于 2021-07-13T00:12:11.643 回答