I possess a text document containing the lines listed below
line1
line2
line3
I am seeking a Python script that will add a new line to the beginning of the file and modify each subsequent line as illustrated below
New Line
Modified : line1 -t
Modified : line2 -t
Modified : line3 -t
Does anyone have any recommendations?
Appreciate it
I recommend avoiding direct manipulation of files as it may not work properly. Instead, consider reading the file and then creating a new file with the desired changes - this method is simpler and more reliable, especially if your input file is not too large to fit in memory:
with open('file.txt') as fin:
# read lines of the file into a list
lines = fin.readlines()
# Overwrite file.txt with updated content
with open('file.txt','w') as fout:
fout.write('Python\n')
for line in lines:
fout.write('Test: ' + line.strip() + ' -t\n')
If memory usage is a concern and it's acceptable to create a new file:
with open('file.txt') as fin:
fout = open('newfile.txt','w')
fout.write('Python\n')
for line in fin:
fout.write('Test: ' + line.strip() + ' -t\n')
fout.close()
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