Python:CSV 按列而不是按行写入 [英] Python: CSV write by column rather than row

问题描述

我有一个 python 脚本，它在一个 while 循环中生成一堆数据.我需要将此数据写入 CSV 文件，因此它按列而不是按行写入.

例如在我生成的脚本的循环 1 中:

(1, 2, 3, 4)

我需要这样在我的 csv 脚本中反映出来:

Result_1 1结果_2 2结果_3 3结果_4 4

在我的第二个循环中，我生成:

(5, 6, 7, 8)

我需要这个来查看我的 csv 文件，如下所示:

Result_1 1 5结果_2 2 6结果_3 3 7结果_4 4 8

依此类推，直到 while 循环结束.有人可以帮我吗?

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编辑

while 循环可以持续超过 100,000 次循环

解决方案

csv 不支持的原因是大多数文件系统并不真正支持可变长度行.您应该做的是收集列表中的所有数据，然后对它们调用 zip() 以将它们转置.

<预><代码>>>>l = [('Result_1', 'Result_2', 'Result_3', 'Result_4'), (1, 2, 3, 4), (5, 6, 7, 8)]>>>邮编(*l)[('Result_1', 1, 5), ('Result_2', 2, 6), ('Result_3', 3, 7), ('Result_4', 4, 8)]

I have a python script that generates a bunch of data in a while loop. I need to write this data to a CSV file, so it writes by column rather than row.

For example in loop 1 of my script I generate:

(1, 2, 3, 4)

I need this to reflect in my csv script like so:

Result_1    1
Result_2    2
Result_3    3
Result_4    4

On my second loop i generate:

(5, 6, 7, 8)

I need this to look in my csv file like so:

Result_1    1    5
Result_2    2    6
Result_3    3    7
Result_4    4    8

and so forth until the while loop finishes. Can anybody help me?

---

EDIT

The while loop can last over 100,000 loops

解决方案

The reason csv doesn't support that is because variable-length lines are not really supported on most filesystems. What you should do instead is collect all the data in lists, then call zip() on them to transpose them after.

>>> l = [('Result_1', 'Result_2', 'Result_3', 'Result_4'), (1, 2, 3, 4), (5, 6, 7, 8)]
>>> zip(*l)
[('Result_1', 1, 5), ('Result_2', 2, 6), ('Result_3', 3, 7), ('Result_4', 4, 8)]

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