如何找到（如果存在）txt 文件中搜索到的字符串同时匹配的那一行？

Question

我需要验证在相应的 .txt 中是否有一行满足这两个匹配项：

名为 file1.txt 的文件的行等于输入字符串 1 "old apple"。
名为 file2.txt 的文件的行等于输入字符串 2 "on the floor"。

例如，file1.txt有这些行：

juicy orange
old apple
rusty key
old apple
modern table
old apple

例如，file2.txt 还有这些其他行：

in a box
on the chair
on the bed
on the floor
on the floor
under the desktop

在这种情况下，正确的行是第 4 行，即索引为 3 的行

这是我的代码，但我遇到了相互匹配要求的问题

string1 = "old apple"
string2 = "on the floor"

num_linea_data_field_1 = None
num_linea_data_field_2 = None

validation_data_field_1 = False
validation_data_field_2 = False

with open("file1.txt","r+") as f:
    lineas = [linea.strip() for linea in f.readlines()]
    if (string1 not in lineas):
        pass
    else:
        num_linea_data_field_1 = lineas.index(string1)
        validation_data_field_1 = True

with open("file2.txt","r+") as f:
    lineas = [linea.strip() for linea in f.readlines()]
    if (string1 not in lineas):
        pass
    else:
        num_linea_data_field_2 = lineas.index(string2)
        validation_data_field_2 = True


if(validation_data_field_1 == True and validation_data_field_2 = True):
    print("Mutual coincidence condition is satisfied with these inputs!")

else:
    print("Mutual coincidence condition is not satisfied with these inputs!")

如果其中一个输入匹配但位于文件的不同行，则此代码失败。

我该如何处理这种双重匹配算法？

Answer 1

在您的代码中，您只检查相应列表中是否存在字符串，而不检查相应的行号是否匹配。但即使您会检查，由于 .index 的工作方式，您的代码也可能会产生错误的输出。引用自here：

list.index(x[, start[, end]])

Return zero-based index in the list of the first item whose value is equal to x. Raises a ValueError if there is no such item.

...

你只得到第一个索引。因此，如果没有与各自的第一个发现相匹配的行号，您就会被卡住。

如果您只对是否有匹配项感兴趣，那么您可以这样做：

with open("file1.txt", "r") as file1,\
     open("file2.txt", "r") as file2:
    matches = any(
        row1.strip() == string1 and row2.strip() == string2
        for row1, row2 in zip(file1, file2)
    )

if matches:
    print("Mutual coincidence condition is satisfied with these inputs!")
else:
    print("Mutual coincidence condition is not satisfied with these inputs!")

如果您也对提供匹配的行号感兴趣：

with open("file1.txt", "r") as file1,\
     open("file2.txt", "r") as file2:
    matches = [
        i for i, (row1, row2) in enumerate(zip(file1, file2), start=1)
        if row1.strip() == string1 and row2.strip() == string2
    ]

if matches:
    print("Mutual coincidence condition is satisfied with these inputs!")
    print(f"Rows with matches: {', '.join(str(i) for i in matches)}")
else:
    print("Mutual coincidence condition is not satisfied with these inputs!")

如何找到（如果存在）txt 文件中搜索到的字符串同时匹配的那一行？

How to find (if it exists) that line of a txt file where the searched strings match at the same time?

python

string

validation

readfile

python-3.x