Python 字符串索引必须是整数
我试图从Python中的Geojson中提取坐标,当我试图从整个文件中提取坐标时,它抛出了一个错误“字符串索引必须是整数”。但当我试图提取单个坐标时,它运行良好 以下代码给出的正确结果为[46.931625,-84.52694]Python 字符串索引必须是整数,python,list,coordinates,geojson,Python,List,Coordinates,Geojson,我试图从Python中的Geojson中提取坐标,当我试图从整个文件中提取坐标时,它抛出了一个错误“字符串索引必须是整数”。但当我试图提取单个坐标时,它运行良好 以下代码给出的正确结果为[46.931625,-84.52694] import geojson with open('output.json') as f: gj = geojson.load(f) features = gj['features'][0] geometry = features['geometry'] ge
import geojson
with open('output.json') as f:
gj = geojson.load(f)
features = gj['features'][0]
geometry = features['geometry']
geometry['coordinates']
但当我试图运行整个文件时,它会抛出一个错误
for feature in gj['features']:
for geometry in feature['geometry']:
for coordinates in geometry:
print(geometry['coordinates'])
样本数据如下
{
"type": "FeatureCollection",
"features": [
{
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
46.931625,
-84.52694
]
},
"properties": {
"event": "a",
}
},
{
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
46.931725,
-84.52684
]
},
"properties": {
"event": "a",
}
}
]
}
你能帮我纠正这个错误吗。提前感谢。嗯,
功能['geometry']
是一个字典,因此下面的一行将遍历该dict的键:
for geometry in feature['geometry']:
由于几何体
是一个键,例如“type”
,它是一个字符串,因此会出现该错误。此外,您似乎没有在代码中的任何地方使用循环变量坐标
请尝试以下操作:
for feature in gj['features']:
print(feature["geometry"]['coordinates'])
或者更好
for feature in gj['features']:
lat, lon = feature["geometry"]['coordinates']
print("Lat:", lat, "Lon: ", lon)
这会导致类似的结果
('Lat:', 46.931625, 'Lon: ', -84.52694)
('Lat:', 46.931725, 'Lon: ', -84.52684)
嗯,feature['geometry']
是一个字典,所以下面一行将遍历该dict的键:
for geometry in feature['geometry']:
由于几何体
是一个键,例如“type”
,它是一个字符串,因此会出现该错误。此外,您似乎没有在代码中的任何地方使用循环变量坐标
请尝试以下操作:
for feature in gj['features']:
print(feature["geometry"]['coordinates'])
或者更好
for feature in gj['features']:
lat, lon = feature["geometry"]['coordinates']
print("Lat:", lat, "Lon: ", lon)
这会导致类似的结果
('Lat:', 46.931625, 'Lon: ', -84.52694)
('Lat:', 46.931725, 'Lon: ', -84.52684)
样本中的要素是唯一的阵列对象。循环遍历特征并获得坐标数组
压缩代码:
print([features['geometry']['coordinates'] for features in gj['features']])
这将循环通过gj['features']
并仅打印每个特征的特征['geometry']['coordinates']
您的脚本将如下所示
import geojson
with open('output.json') as f:
gj = geojson.load(f)
print([features['geometry']['coordinates'] for features in gj['features']])
样本中的要素是唯一的阵列对象。循环遍历特征并获得坐标数组
压缩代码:
print([features['geometry']['coordinates'] for features in gj['features']])
这将循环通过gj['features']
并仅打印每个特征的特征['geometry']['coordinates']
您的脚本将如下所示
import geojson
with open('output.json') as f:
gj = geojson.load(f)
print([features['geometry']['coordinates'] for features in gj['features']])