CODEWITHSUNDEEP
python
Choudhury Iqbal
Choudhury Iqbal

Reputation: 27

What changes do I need to make in the following program?

Write a program that asks the user for a file containing a list of items to be completed and a name for an output file. Your program should then write the list, with item numbers to the output file. For example, if the input file is:

Finish my python homework.
Buy milk.
Do laundry.
Update webpage.

Then the output file would be:

1.  Finish my python homework.
2.  Buy milk.
3.  Do laundry.
4.  Update webpage.

I tried to do this the following way:

infileNames=input("what is the file that contain a list of items?")
outfileName=input("what is the file that contain a list of items?")
infile=open(infileName,"r")
outfile=open(outfileName,"w")
data=infile.read()
countnolines=len(open(infileName).readlines())
for p in range(1,countnolines+1):
    print(p,data,file=outfile)
infile.close()
outfile.close()

But my outfile looks like:

1 Finish my python homework.
Buy milk.
Do laundry.
Update webpage.
2 Finish my python homework.
Buy milk.
Do laundry.
Update webpage.
3 Finish my python homework.
Buy milk.
Do laundry.

Update webpage.
4 Finish my python homework.
Buy milk.
Do laundry.
Update webpags

*strong text*thanks guys for help

Upvotes: 0

Views: 119

Answers (1)

Adam Smith
Adam Smith

Reputation: 54243

OLD AND BUSTED:

infilenames = input("what is the file that contain a list of items?")
outfileName = input("what is the file that contain a list of items?")
infile = open(infilenames)
outfile = open(outfilename,'w')
data = infile.readlines() # a list of the lines of infile

lineno = 1
for line in data:
    print(lineno,line.strip(),file=outfile)
    lineno += 1

outfile.close()
infile.close()

NEW HOTNESS:

with open(INPUT_FILE) as in_, open(OUTPUT_FILE, "w") as out:
    for i, line in enumerate(in_, 1):
        out.write("{}. {}\n".format(i,line.strip()))

Upvotes: 5

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