我需要在以下程序中进行哪些更改？

Question

  

编写一个程序，要求用户提供一个文件，其中包含要完成的项目列表和输出文件的名称。然后，您的程序应该将列表编号，并将项目编号写入输出文件。例如，如果输入文件是：

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

  

然后输出文件将是：

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

我尝试按以下方式执行此操作：

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()

但是我的outfile看起来像：

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

* 强文 *感谢大家的帮助

Answer 1

老而死：

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()

新热点：

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()))