python删除最后一个逗号

Question

I have some thing like this in output.txt file

Service1:Aborted
Service2:failed
Service3:failed
Service4:Aborted
Service5:failed

output in 2nd file(output2.txt) :

 Service1        Service2   Servive3   Service4     Service5
 Aborted         failed     failed     Aborted      failed

Would like to remove the last comma in the line.

Code I am trying:

    file=open('output.txt','r')
    target=open('output2.txt','w')
    for line in file.readlines():
          line=line.strip()
          parts=line.split(":")
          for part in parts:
               var2=part.strip()+","
          target.write(var2.rstrip(','))        # Not working
   target.close()

Answer 1

Use a list and append the items to it. Accessing parts[-1] returns the last item from the splitted parts. Then use join() to put the commas in between all collected states:

states = []
for line in file.readlines():
    parts=line.strip().split(':')
    states.append(parts[-1])
print(','.join(states))

Answer 2

This makes the output you originally requested:

file=open('output.txt','r')
target=open('output2.txt','w')
states = [line.strip().split(':')[-1] for line in file.readlines()]
target.write(','.join(states))
target.close()

That is, the output of this code is:

Aborted,failed,failed,Aborted,failed

For a table view, assuming the tabbed output will line up, this code:

file=open('output.txt','r')
target=open('output2.txt','w')
states, titles = [], []
for line in file.readlines():
    title, state = line.split(':')
    titles.append(title)
    states.append(state)
target.write('\t'.join(titles))
target.write('\n')
target.write('\t'.join(states))
target.close()

will produce the requested table view (note there are no commas in this output):

Service1        Service2   Servive3   Service4     Service5
Aborted         failed     failed     Aborted      failed

If you want to control alignment more precisely, you'll need to apply formatting, such as measuring the maximum width of text in each column and then using that as a formatting specifier.