Question

Using Python, I need to search a text file for a string “that/”

I then need get the line number (currently doing so by using enumerate), and print off
“that\” + the remaining text until the next space.

Example text: First/LS thing/NN I/PRP want/VBP to/TO ask/VB is/VBZ if/IN you/PRP remember/VBP any/DT books/NNS that/IN you/PRP read/VBP as/IN a/DT child/NN

Example output: that/IN 14

Here is the code I have right now, which functions correctly, but wherever it should print “that/xx” it prints nothing.

with open(filename) as f:
            for num, line in enumerate(f, 1):
                if 'that/' in line:
                    myString = line
                    mySub = myString[myString.find('that/'):myString.find(' ')]
                    print(mySub, str(num))
                    formattedLines.append(mySub + ' ' + str(num) + '\n')

Answer 1

I think the problem is that the whitespace can happen before the that/. Start your search for the whitespace at the index where that/ was found:

with open(filename) as f:
    for num, line in enumerate(f, 1):
        if 'that/' in line:
            myString = line
            where_is_that = myString.find('that/')
            mySub = myString[where_is_that:myString.find(' ', where_is_that)]
            print(mySub, str(num))
            formattedLines.append(mySub + ' ' + str(num) + '\n')