将 Python 列表列表写入 csv 文件 [英] Writing a Python list of lists to a csv file

问题描述

我有一长串以下形式的列表---

I have a long list of lists of the following form ---

a = [[1.2,'abc',3],[1.2,'werew',4],........,[1.4,'qew',2]]

即列表中的值是不同类型的——float、int、strings.如何将其写入 csv 文件，以便我的输出 csv 文件看起来像

i.e. the values in the list are of different types -- float,int, strings.How do I write it into a csv file so that my output csv file looks like

1.2,abc,3
1.2,werew,4
.
.
.
1.4,qew,2

推荐答案

Python 的内置 CSV 模块可以轻松处理:

Python's built-in CSV module can handle this easily:

import csv

with open("output.csv", "wb") as f:
    writer = csv.writer(f)
    writer.writerows(a)

这假设您的列表被定义为 a，因为它在您的问题中.您可以通过 csv.writer() 的各种可选参数调整输出 CSV 的确切格式，如上面链接的库参考页面中所述.

This assumes your list is defined as a, as it is in your question. You can tweak the exact format of the output CSV via the various optional parameters to csv.writer() as documented in the library reference page linked above.

Python 3 更新

import csv

with open("out.csv", "w", newline="") as f:
    writer = csv.writer(f)
    writer.writerows(a)

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