Line extracted from text not matching the content of the text array

Question

I have this block of code:

    def removal(i):
    with open(r"D:LargecodefileCustomer.txt", "r") as f:
        lines = f.readlines()
    h,j = i-2,i-1
    data1, data2 = lines[h],lines[j]
    print('data is ',data1,'and',data2)
    print('line is ',lines)
    with open(r"D:LargecodefileCustomer.txt", "w") as f:
        for line in lines:
            if line.strip('n') != data1 and data2:
                f.write(line)

I’m trying to make it rewrite the file and exclude the specific line that I choose. As of right now, my line output is:

line is  ['JSJSJSJSJSn', '10-02-1975n', 'HAHAHAHAHAn', '26-11-2001n', 'BOTBOITBOTn', '13-09-2018n', 'Philln', 'Gill']

and data1 and data 2 is:

data is  Philln and Gill

They seem matchup to the list from I what see, however, the system is not recognizing it, I think the problem is at the second last line of the code but I can’t make it work. Is it that I went wrong somewhere? Thank you!

Edit: Hi, it’s me again, I just want to add that I’ve tried using 1 data to excluded it too and see if it works, if line.strip('n') != data1: but sadly the result is still the same, I tried removing n either, not reccomended but I did it anyway, does not get affected too

Asked By: V21

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Source

Answer 1

It’s much easier if you strip the incoming file as you build a list of lines. splitlines on a string is ideal for this.

If you use open mode r+ there’s no need to open the file twice. Just seek to BOF after consuming the file content and remember to call truncate before closing.

def removal(i):
    with open(r"D:LargecodefileCustomer.txt", 'r+', newline='') as f:
        lines = f.read().splitlines()
        h, j = i-2, i-1
        # validation here is critical
        if h >= 0 and j < len(lines):
            data1, data2 = lines[h], lines[j]
            f.seek(0) # BOF
            for line in lines:
                if not line in {data1, data2}:
                    print(line, file=f) # print will add the newline
            f.truncate()

Answered By: OldBill

Answer 2

Thats a syntax mistake. You are checking if line does not equal to data1, and if data2 is True:

if line.strip('n') != data1 and data2:

solution (check if line also does not equal to data2):

if line != data1 and line != data2:

Answered By: Olusiowiec

Line extracted from text not matching the content of the text array

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