CSV到Folium HeatMap

Question

我有一个csv，其中包含许多与所示精确格式不同的经纬度：39.360611,-74.431877

运行以下代码：

import csv
from folium import plugins

heatmap_map = folium.Map(location=[48, -102], zoom_start=3)

with open('geolocation.csv', "r") as f:
    reader = csv.reader(f)
    data = [[row[0], row[1]] for row in reader]
    print(data)

hm = plugins.HeatMap(data)
heatmap_map.add_children(hm)
f.close()

heatmap_map.save("heatmap.html") 

给我以下输出

[['39.360611', '-74.431877']]
Traceback (most recent call last):
  File "C:\Users\dge\Anaconda3\lib\site-packages\folium\utilities.py", line 59, in validate_location
    float(coord)
ValueError: could not convert string to float: 'None'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File ".\heat.py", line 12, in <module>
    hm = plugins.HeatMap(data)
  File "C:\Users\dge\Anaconda3\lib\site-packages\folium\plugins\heat_map.py", line 67, in __init__
    for line in data]
  File "C:\Users\dge\Anaconda3\lib\site-packages\folium\plugins\heat_map.py", line 67, in <listcomp>
    for line in data]
  File "C:\Users\dge\Anaconda3\lib\site-packages\folium\utilities.py", line 63, in validate_location
    .format(coord, type(coord)))
ValueError: Location should consist of two numerical values, but 'None' of type <class 'str'> is not convertible to float.

我很困惑为什么在一切都按预期方式打印时会出现错误，所以将不胜感激

Answer 1

我意识到在CSV中有一个单词None引起错误