python解决打开文件找出每行数据最大值和最小值，最大值减去最小值，并且讲结果存入out.txt文件中

可以使用以下代码实现：

with open('file.txt', 'r') as f:
    lines = f.readlines()

results = []
for line in lines:
    nums = list(map(float, line.split()))
    max_val = max(nums)
    min_val = min(nums)
    diff = max_val - min_val
    results.append(diff)

with open('out.txt', 'w') as f:
    for result in results:
        f.write(str(result) + '\n')

这段代码首先打开文件 `file.txt`，读取每一行数据，然后对每一行数据进行处理，找出最大值和最小值，计算差值，最后将结果存入 `out.txt` 文件中。