循环并存储坐标

Question

我有一个如下所示的数据框副本：

heatmap_df = test['coords'].copy()
heatmap_df


0     [(Manhattanville, Manhattan, Manhattan Communi...
1     [(Mainz, Rheinland-Pfalz, 55116, Deutschland, ...
2     [(Ithaca, Ithaca Town, Tompkins County, New Yo...
3     [(Starr Hill, Charlottesville, Virginia, 22903...
4     [(Neuchâtel, District de Neuchâtel, Neuchâtel,...
5     [(Newark, Licking County, Ohio, 43055, United ...
6     [(Mae, Cass County, Minnesota, United States o...
7     [(Columbus, Franklin County, Ohio, 43210, Unit...
8     [(Canaanville, Athens County, Ohio, 45701, Uni...
9     [(Arizona, United States of America, (34.39534...
10    [(Enschede, Overijssel, Nederland, (52.2233632...
11    [(Gent, Oost-Vlaanderen, Vlaanderen, België - ...
12    [(Reno, Washoe County, Nevada, 89557, United S...
13    [(Grenoble, Isère, Auvergne-Rhône-Alpes, Franc...
14    [(Columbus, Franklin County, Ohio, 43210, Unit...

每一行都有一些坐标的格式：

heatmap_df[2]
[Location(Ithaca, Ithaca Town, Tompkins County, New York, 14853, United States of America, (42.44770298533052, -76.48085858627931, 0.0)),
 Location(Chapel Hill, Orange County, North Carolina, 27515, United States of America, (35.916920469999994, -79.05664845999999, 0.0))]

我想从每一行中提取纬度和经度并将它们作为单独的列存储在数据框中 heatmap_df。到目前为止我有这个，但我不擅长写循环。我的循环没有递归地工作，它只打印出最后的坐标。

x = np.arange(start=0, stop=3, step=1)
for i in x:
    point_i = (heatmap_df[i][0].latitude, heatmap_df[i][0].longitude)
    i = i+1
point_i

(42.44770298533052, -76.48085858627931)

我正在尝试使用 Folium 制作包含所有坐标的热图。有人可以帮忙吗？谢谢

Answer 1

Python 不知道您要做什么，假设您想在每次迭代中将 (heatmap_df[i][0].latitude, heatmap_df[i][0].longitude) 的元组值存储在变量 point_i 中。所以每次都会被覆盖。您想在外部声明一个列表，然后将 append 一个 Lat 和 Long 列表循环到它，创建一个列表列表，它可以很容易地成为一个 DF。此外，示例中的循环不是递归的，检查 this 是否存在递归

试试这个：

x = np.arange(start=0, stop=3, step=1)
points = []
for i in x:
    points.append([heatmap_df[i][0].latitude, heatmap_df[i][0].longitude])
    i = i+1
print(points)

循环并存储坐标

Loop and store coordinates

python

loops

coordinates

heatmap

folium