how to read a file from command line, then output a file with the same name but different extension in python

Question

I want to read a file from command line first, then run my script and output a file with a different extension.

for example: if I do python script.py apple.java there should be an output file called banana.md

I do not want to rename the file. Dont worry about path or anything.

n= sys.argv[-1]
base = os.path.splitext(n)[0]


os.rename(n,base + ".md")

*The code I wrote now is keep on renaming the existing file :(* - Show it. — vaultah, Jul 28 '14 at 16:26
I do not want to use my code to confuse others..But whatever, i put it on now — ahri, Jul 28 '14 at 16:31
I am not copying a file...I am working on a script to convert a json file to a markdown file. I have already finished the script. The only thing I need to do is to change the extension — ahri, Jul 28 '14 at 16:39
"I do not want to rename the file. So both apple.java and apple.md should be there", how is that not copying? — Padraic Cunningham, Jul 28 '14 at 16:42

score 0 · Answer 1 · answered Jul 28 '14 at 16:29

0

you can copy the file : you can use shutil.copyfile which will do the job just fine.

or you can just try to read it and write it:

with open (input,'r') as in:
    with open(output,'w') as out:
        out.write(in.read())

answered Jul 28 '14 at 16:29

Bruce

would that copy the whole file? I do not want to copy file cause I am writing a script to convert one file to another – ahri Jul 28 '14 at 16:32
how would I specify and change extension there? – ahri Jul 28 '14 at 16:37

1 Answers1