在 Python 中编写以空格分隔的文本以供人类阅读 [英] Writing white-space delimited text to be human readable in Python

问题描述

我有一个看起来像这样的列表:

I have a list of lists that looks something like this:

data = [['seq1', 'ACTAGACCCTAG'],
        ['sequence287653', 'ACTAGNACTGGG'],
        ['s9', 'ACTAGAAACTAG']]

我将信息写入这样的文件:

I write the information to a file like this:

for i in data:
    for j in i:
        file.write('\t')
        file.write(j)
    file.write('\n')

输出如下:

seq1   ACTAGACCCTAG  
sequence287653   ACTAGNACTGGG  
s9   ACTAGAAACTAG  

由于每个内部列表中第一个元素的长度不同，列没有整齐排列.如何在第一个和第二个元素之间写入适当数量的空格，以使第二列对齐以提高可读性?

The columns don't line up neatly because of variation in the length of the first element in each internal list. How can I write appropriate amounts of whitespace between the first and second elements to make the second column line up for human readability?

推荐答案

您需要一个格式字符串:

You need a format string:

for i,j in data:
    file.write('%-15s %s\n' % (i,j))

%-15s 表示左对齐字符串的 15 个空格字段.这是输出:

%-15s means left justify a 15-space field for a string. Here's the output:

seq1            ACTAGACCCTAG
sequence287653  ACTAGNACTGGG
s9              ACTAGAAACTAG

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