类型错误:列表索引必须是整数或切片,而不是 str [英] TypeError: list indices must be integers or slices, not str
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问题描述
我有两个列表,我想将它们合并到一个数组中,最后将其放入一个 csv 文件中.我是 Python 数组的新手,我不明白如何避免此错误:
I've got two lists that I want to merge into a single array and finally put it in a csv file. I'm a newbie with Python arrays and I don't understand how I can avoid this error :
def fill_csv(self, array_urls, array_dates, csv_file_path):
result_array = []
array_length = str(len(array_dates))
# We fill the CSV file
file = open(csv_file_path, "w")
csv_file = csv.writer(file, delimiter=';', lineterminator='\n')
# We merge the two arrays in one
for i in array_length:
result_array[i][0].append(array_urls[i])
result_array[i][1].append(array_dates[i])
i += 1
csv_file.writerows(result_array)
得到:
File "C:\Users\--\gcscan.py", line 63, in fill_csv
result_array[i][0].append(array_urls[i])
TypeError: list indices must be integers or slices, not str
我的计数如何工作?
推荐答案
首先,array_length
应该是整数而不是字符串:
First, array_length
should be an integer and not a string:
array_length = len(array_dates)
其次,您的 for
循环应该使用 range
构建:
Second, your for
loop should be constructed using range
:
for i in range(array_length): # Use `xrange` for python 2.
第三,i
会自动递增,所以删除下面一行:
Third, i
will increment automatically, so delete the following line:
i += 1
注意,如果两个列表的长度相同,也可以只zip
两个列表:
import csv
dates = ['2020-01-01', '2020-01-02', '2020-01-03']
urls = ['www.abc.com', 'www.cnn.com', 'www.nbc.com']
csv_file_patch = '/path/to/filename.csv'
with open(csv_file_patch, 'w') as fout:
csv_file = csv.writer(fout, delimiter=';', lineterminator='\n')
result_array = zip(dates, urls)
csv_file.writerows(result_array)
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