loops - Python iterate and write to second file -

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i trying iterate through tab delimited text file , write rows contain value second text file. attempt below. calling print(line) on original file after line 3 prints correct rows, , same issue 151 message (shown below) when use open & close instead of i'm assuming problem relates way i've used file.write(line). i'm pretty new @ this...

with open("file_1.idx", "r") file_1:     line in file_1:         if "abc" in line:             open("file_2.rtf", "w") file_2:                 file_2.write(line)   151 151 151

you reopen (and overwrite) second file. should work:

with open("file_1.idx", "r") file_1, open("file_2.rtf", "w") file_2:     line in file_1:         if "abc" in line:             file_2.write(line)

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