Python错误-IndexError：列表索引超出范围

Question

我正在学习python，所以听起来似乎很简单，我正在尝试运行下面的代码，但是我一直收到显示的错误消息，关于可能引起该错误的任何想法？

from geopy import geocoders
import csv

g_api_key = 'my_google_api_key'
g = geocoders.GoogleV3(g_api_key)

costco = csv.reader (open('costcolimited.csv'), delimiter = ',')

# Print header
print "Address, City, State, Zip Code, Latitude, Longitude"
for row in costco:
   full_addy = row[1]+ "," + row[2]+ "," + row[3] + "," + row[4]
   place, (lat,lng) = list (g.geocode(full_addy, exactly_one=FALSE))[0]
   full_addy + "," + str(lat) + "," + str(lng)

我得到的错误

Traceback (most recent call last):
File "C:\Python27\geocodelocations.py", line 12, in <module>
full_addy = row[1]+ "," + row[2]+ "," + row[3] + "," + row[4]
IndexError: list index out of range

Answer 1

该错误是由于引用超出列表范围的元素引起的。 从您的代码中，可能是因为您从1开始计数元素。 请记住，在python列表中，index从0开始。 如果您遇到这种情况，则将索引移入

full_addy = row[1]+ "," + row[2]+ "," + row[3] + "," + row[4]

至

full_addy = row[0]+ "," + row[1]+ "," + row[2] + "," + row[3]

否则，请检查您的数据结构并确保它与您的代码匹配。

谢谢

Answer 2

首先，请确保您的CSV文件有四列。 尝试检查len(row) >= 4 。 如果包含，则可以继续执行代码，但是Python列表中的第一项由0索引引用。

尝试这样的事情：

for row in costco:
   if len(row) < 4:
          print "Invalid file!"
          break
   full_addy = row[0]+ "," + row[1]+ "," + row[2] + "," + row[3]
   place, (lat,lng) = list (g.geocode(full_addy, exactly_one=FALSE))[0]
   full_addy + "," + str(lat) + "," + str(lng)