如何使用 python 在文本文件中搜索整数 (x,y)？

发布于 2024-10-21 08:15:06 字数 388 浏览 1 评论 0原文

我有一个存储在文本文件中的矩阵：

(i, j)      count

我需要搜索 (i,j) 对。我该怎么做？

with open("matrix.txt","r") as searchmat:            
        for line in searchmat:
                word=str((x,y))
                if word in line:
            t=line.split('\t')
            f=t[1]
                return f

对于所有值，我都得到NONE。

原文

I have a matrix stored in a textfile as:

(i, j)      count

I need to search for the pair (i,j). How do I do that?

with open("matrix.txt","r") as searchmat:            
        for line in searchmat:
                word=str((x,y))
                if word in line:
            t=line.split('\t')
            f=t[1]
                return f

I am getting NONE for all the values.

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⒈起吃苦の倖褔 2024-10-28 08:15:06

代码看起来不错（假设你的缩进正确）。也许您的数据文件格式有问题。分隔符中可能有多个制表符吗？尝试使用 t=line.split() 代替。

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不交电费瞎发啥光 2024-10-28 08:15:06

看来你弄乱了缩进。从你（我假设）粘贴到这里的代码来看，看起来你混合了制表符和空格，这是 Python 绝对不喜欢的。将文件中的所有制表符替换为空格，并缩进代码，如下所示：

with open("matrix.txt","r") as searchmat:            
    for line in searchmat:
        word=str((x,y))
        if word in line:
            t=line.split('\t')
            f=t[1]
            return f

Looks like you have messed up indentation. From looking at the code you've (I assume) pasted here, it looks like you have mixed tabs and spaces, which Python most definitely does not like. Replace all tabs in your file with spaces, and indent your code so it looks like this:

with open("matrix.txt","r") as searchmat:            
    for line in searchmat:
        word=str((x,y))
        if word in line:
            t=line.split('\t')
            f=t[1]
            return f

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落在眉间の轻吻 2024-10-28 08:15:06

这可能会有所帮助：

def reader(path):
    import re
    pattern = re.compile("^\((\d*), (\d*)\).*$")
    with open(path) as searchmat:
        for line in searchmat:
            print re.match(pattern, line).group(1, 2)   # print both raw groups
            print int(re.match(pattern, line).group(1)) # first number as int
            print int(re.match(pattern, line).group(2)) # second number as int

它遍历 path 给出的文件，并在每一行中查找您所描述的模式。

This might help:

def reader(path):
    import re
    pattern = re.compile("^\((\d*), (\d*)\).*$")
    with open(path) as searchmat:
        for line in searchmat:
            print re.match(pattern, line).group(1, 2)   # print both raw groups
            print int(re.match(pattern, line).group(1)) # first number as int
            print int(re.match(pattern, line).group(2)) # second number as int

It traverses the file given by path and looks in each line for the pattern you described.

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