Python 从文本中检索变量

Question

我正在尝试从文本文件中检索变量并将这些变量传递给 python。同样在一个文本文件中，我将包含如下内容:

Total Numbers: 22, Total Boxes: 33, Total Tickets: 62, Total Files: 107
Total Numbers: 2, Total Boxes: 53, Total Tickets: 92, Total Files: 105
Total Numbers: 3, Total Boxes: 13, Total Tickets: 22, Total Files: 137
Total Numbers: 42, Total Boxes: 38, Total Tickets: 62, Total Files: 143

我如何只从最后一行获取变量，例如我希望能够传递Total Numbers: 42，然后单独传递Total Boxes: 38，等等等等

例如假设我在 python 中有一个函数

def get_content():
f = open('test.txt')
#not sure how to only retrieve last line
my_number = # this is where i want to pass Total_numbers to get a value of 42
f.close()

Answer 1

如果文件不是太大，只需使用readlines 将行读入列表，使最后一行易于查找。有了该行后，将其拆分为逗号，然后再次拆分为空格以隔离值。我不确定您所说的“传递”它们是什么意思...所以这是一个示例，它仅提取 4 个值，将它们转换为整数并将它们作为 tuple 返回。

def get_content():
    """"Returns (numbers, boxes, tickets, files) for the last entry
    in test.txt"""
    with open('test.txt') as fp:
        lines = fp.readlines()
    # just in case there is an empty line at the end...
    while lines and not lines[-1].startswith('Total Numbers'):
        del lines[-1]
    if lines:
        # split on comma then take the number at the end and return
        return tuple(int(part.split()[-1]) for part in lines[-1].strip().split(','))

print(get_content())