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+--- Thread: How to add 1 in a text file ? (/thread-6052.html)
How to add 1 in a text file ? - jacklee26 - Nov-04-2017
Do anyone know how to add 1 to a text file.
For example :
Test.txt contain:
test 1
test 2
test 3
I wish to add 1 to the file and write to a new file NewTest.txt.
So the newtest.txt should output like it
test 2
test 3
test 4
with open('test.txt') as f:
new_file = open("newtest.txt", "w")
for item in f.readlines():
RE: How to add 1 in a text file ? - snippsat - Nov-04-2017
Use code tag BBcode help,use
Ctrl+Shift+v when copy in to preserve indentation.with open('data.txt') as f,open('new.txt', 'w') as f_out:
lst = [i.strip() for i in f]
lst.append('test 4')
f_out.write('\n'.join(lst))To append to existing file.with open('data.txt', 'a') as f:
f.write('test 4\n')
RE: How to add 1 in a text file ? - jacklee26 - Nov-04-2017
Actually, i want to change the integer to plus 1
test 1 +1
test 2 +1
test 3 +1
How do i change ? All the integer add 1
so the new file should look like
test 2
test 3
test 4
RE: How to add 1 in a text file ? - Larz60+ - Nov-05-2017
since test 1 is a string, you need something like:
mystr = 'test 1' mystr = mystr[:-1] + str(int(mystr[-1:]) + 1) print(mystr)which will produce:
Output:test 2#s3gt_translate_tooltip_mini { display: none !important; }
RE: How to add 1 in a text file ? - jacklee26 - Nov-05-2017
is there any example with reading a file
How does this implement into a file
mystr = 'test 1'
mystr = mystr[:-1] + str(int(mystr[-1:]) + 1)
print(mystr)
RE: How to add 1 in a text file ? - Larz60+ - Nov-05-2017
it doesn't, but snippsat showed you how to do that.
with open('data.txt') as f,open('new.txt', 'w') as f_out:
for line in f:
line = line.strip()
line = line[:-1] + str(int(line[-1:]) + 1)
f_out.write('{}\n'.format(line))
RE: How to add 1 in a text file ? - buran - Nov-05-2017
just to mention that this will work with singe digits, i.e. it will not work with
test 10 for example
RE: How to add 1 in a text file ? - jacklee26 - Nov-06-2017
Thanks it work.