Python中将文件读入列表并替换变量为值

Question

我有一个 data.txt 文件，其中包含以下行：

this is sample {data1}
this one is {data2}
again {data1}

我有这段代码，可以将文件的每一行读取到一个列表中并打印出来：

    data1 = 'line 1'
    data2 = 'line 2'

    with open('data.txt') as file:
        lines = file.read().splitlines()

    print(lines)

输出结果为：

['this is sample {data1}', 'this one is {data2}', 'again {data1}']

现在，我该如何用它们的值替换变量并使其变为以下形式：

['this is sample line 1', 'this one is line 2', 'again line 1']

- Kourosh Nomanpour

Answer 1

将替换项放入字典中，然后调用format()函数。

values = {'data1': 'line 1', 'data2': 'line 2'}
print([line.format(**values) for line in lines])

- Barmar