将列表写入 CSV

Question

我有一个列表列表，例如：

[[A], [B], [A,B], [B], [C], [A, B, C], [C, A]]

我想将其写入 CSV 文件，例如：

A,
B,
A,B,
B,
C,
A,B,C,
C,A,

请考虑我有 556,375 个列表，每个列表至少包含 20 个变量。

Answer 1

要添加额外的逗号，只需在每行末尾添加一个空单元格即可。

这是在 writerows

中使用生成器推导式的简短方法

import csv

l = [["A"], ["B"], ["A","B"], ["B"], ["C"], ["A", "B", "C"], ["C", "A"]]

with open("output.csv","w",newline="") as f:  # open("output.csv","wb") for Python 2
    cw = csv.writer(f)
    cw.writerows(r+[""] for r in l)

Answer 2

file = open("myFile.csv", "w")
writer = csv.writer(file, delimiter = ",")
for list_ in myList:
     writer.writerow(list_)
file.close()

Answer 3

您需要在行尾添加新行 (\n)：

lista = [['A'], ['B'], ['A','B'], ['B'], ['C'], ['A','B','C'], ['C','A']]
f = open('lista.csv','a')
i = 0
while (i<len(lista)):   
    f.write(str(lista[i])+"\n")
    i = i + 1
f.close()

将列表写入 CSV

write list to CSV

python

csv

list

fwrite