如何在Python中从文件中读取数字？
问题内容：
我想将数字从文件中读取到二维数组中。
文件内容：
- 包含w，h的行
- h行包含w个以空格分隔的整数
例如：
4 3
1 2 3 4
2 3 4 5
6 7 8 9
问题答案：
假设您没有多余的空格：
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for循环压缩为嵌套列表推导：
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]
