如何读取和写入表/矩阵文件与Python？ [英] How to read and write a table / matrix to file with python?

问题描述

我试图创建一个程序来获取数据，并把它放在一个2×10的表格中，只是一个文本文件中的数字。然后程序需要在以后的迭代中检索这个信息。但我不知道如何做到这一点。我一直在查看numpty命令，常规文件命令，以及尝试制作表格的方法。但我似乎无法得到任何这个工作。

下面是我想要创建的表格的示例：

  0 1 1 1 0 9 6 5 
 5 2 7 2 1 1 1 0 
  

然后我会检索这些值。什么是这样做的好方法？

解决方案

为什么不使用 csv 模块？ b
$ b

  table = [[1,2,3]，[4,5,6]] 
 
导入csv 
 
＃用open（'test_file.csv'，'w'）写成
作为csvfile：
 writer = csv.writer（csvfile）
 [writer.writerow r）for r in table] 
 
＃以open（'test_file.csv'，'r'）读取
作为csvfile：
 reader = csv.reader（csvfile） 
 table = [[int（e）for e in r] for r in reader] 
  

这种方法的好处是可以让其他程序（如Excel）读取文件。

如果你真的需要它的空间或制表符分隔，只需添加 delimiter =\ t添加到您的读写器构建中。

I'm trying to create a program that takes data and puts it in a 2 by 10 table of just numbers in a text file. Then the program needs to retrieve this information in later iterations. But I have no idea how to do this. I've been looking at numpty commands, regular file commands, and ways to try and make a table. But I can't seem to get any of this to work.

Here is an example of the table I am trying to make:

0    1    1    1    0    9    6    5
5    2    7    2    1    1    1    0

Then I would retrieve these values. What is a good way to do this?

解决方案

Why not use the csv module?

table = [[1,2,3],[4,5,6]]

import csv

# write it
with open('test_file.csv', 'w') as csvfile:
    writer = csv.writer(csvfile)
    [writer.writerow(r) for r in table]

# read it
with open('test_file.csv', 'r') as csvfile:
    reader = csv.reader(csvfile)
    table = [[int(e) for e in r] for r in reader]

This approach has the added benefit of making files that are readable by other programs, like Excel.

Heck, if you really need it space or tab-delimited, just add delimiter="\t" to your reader and writer construction.

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