如何从Python中的文件读取数字？ [英] How to read numbers from file in Python?

问题描述

我想从文件中读取数字到二维数组。

I'd like to read numbers from file into two dimensional array.

文件内容：

• 包含w，h


• h包含用空格分隔的w整数的行

例如：

4 3
1 2 3 4
2 3 4 5
6 7 8 9

推荐答案

假设你没有无关的空白：

Assuming you don't have extraneous whitespace:

with open('file') as f:
    w, h = [int(x) for x in next(f).split()] # read first line
    array = []
    for line in f: # read rest of lines
        array.append([int(x) for x in line.split()])

您可以将最后一个循环集中到嵌套列表理解中：

You could condense the last for loop into a nested list comprehension:

with open('file') as f:
    w, h = [int(x) for x in next(f).split()]
    array = [[int(x) for x in line.split()] for line in f]

这篇关于如何从Python中的文件读取数字？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！