将文本文件分为两个不重叠的文件

Question

Let me explain the problem in detail...

i have two text files (pool files) CL-0.txt and CL-1.txt I have to divide each of the two into two further parts. CL-0.txt into two further parts xx_0.txt and yy_0.txt and CL-1.txt into parts xx_1.txt and yy_1.txt. the contents of two files are in the following format. CL-0 (apple, orange) (mango, banana) (cake, tea) (coffee, sugar) (milk, honey) (cake, biscuts) CL-1 (orange, mango) (grapes, coffee) (car, icecream) (table, chair) (window, milk)

to clear what i am refering to as an entry and as an entity: an entry is: (apple, orange) and an entity is: apple each entry has two elements. the comma being the separator. there should be no duplicate entries or entries. if an entry or an element has appeared in xx_0.txt, it cannot appear in yy_0.txt and yy_1.txt if an entry or an element has appeared in yy_0.txt, it cannot appear in xx_0.txt and xx_1.txt if an entry or an element has appeared in xx_1.txt, it cannot appear in yy_0.txt and yy_1.txt if an entry or an element has appeared in yy_1.txt, it cannot appear in xx_0.txt and xx_1.txt

each entry is taken one by one and entries are alternately selected for the two files till an entry is written into the file.

the expected output is as follows

the constituent files from CL-0:

*the xx_0 file should have: (apple, orange) (cake, tea) (milk, honey)

*the yy_0 file should have: (mango, banana) (coffee, sugar) (cake, biscuts) cannot be added as cake has already appeared in xx_0

the constinuent files from CL-1:

*the xx_1 file should have: (orange, mango) * a duplicate entry is OK in this case (car, icecream)

*the yy_1 file would have: (grape, coffee) * again a duplicate entry is ok in this case (table, chair) (window, milk) cannot be added here as it would have duplicate entity milk which has already appeared in xx_0 file

I attempted half of the problem thinking that if i can successfully divide the CL-0 file into two parts, the rest could be implemented easily with a bit of tweaking.

My effort is as follows:

xx_0=open('xx_0.txt','wb') #the file that i want to populate
yy_0=open('yy_0.txt','wb') #the file that i want to populate
file=open('CL-0.txt','r')  # the main file
xx0=set()
xx1=set() # un1 a set against which the desired file has to be checked against for matches
yy0=set()
yy1=set() # un2 a set against which the desired file has to be checked against for matches
for line in file:
    s=line.replace('[,]','')

    s=s.replace('\n','')
    s=s.replace('(','')
    s=s.replace(')','')
    s=s.replace("'",'')

    r=re.split(',',s)
    if L==1:
        for n in r:
            if n not in yy0:
                if n not in yy1:
                    xx0.add(n)
        r1= ', '.join(r)
        xx_0.write(r1)
        xx_0.write('\n')

        L+=1
        continue

    if L==2:
        for n in r:
            if n not in xx_1:
                if n not in yy_1:
                    yy0.add(n)                  
        r2=', '.join(r)
        yy_0.write(r2)
        yy_0.write('\n')
        L=1

Answer 1

Assuming the lines shall be put alternating into two different files:

inputFile = file('CL-0.txt')
out = [ file(fileName, 'wb') for fileName in [ 'xx_0.txt', 'yy_0.txt' ] ]
done = set()
for line in inputFile:
  elements = re.match(r'\s*\(\s*([^,])*\s*,\s*([^)])*\)\s*', line)
  if elements in done:
      continue
  out[0].write(', '.join(elements) + '\n')
  done.add(elements)
  out = out[1:] + [ out[0] ]  # round robin
for f in out:
  f.close()

But I did not understand what the purpose of these xx1 and yy1 sets was. Your code definitely wasn't explaining it (it did not write to these at all) and your text wasn't helpful enough either. Maybe you want to elaborate on that?