python - Data sorting, combining 2 lines -

i have file looking way:

    ;1;108/1;4, 109     ;1;51;4, 5     ;2;109/2;4, 5     ;2;108/2;4, 109     ;3;108/2;4, 109     ;3;51;4, 5     ;4;109/2;4, 5     ;4;51;4, 5     ;5;109/2;4, 5     ;5;40/6;5, 6, 7 

where

    ;id1;id2;position_on_shelf_id2     ;id1;id3;position_on_shelf_id3 

as result, want get: id1;id2-id3;x x common shelf positions both id2 , id3, should this

    1;108/1-51;4     2;109/2-108/2;4     3;108/2-51;4     4;109/2-51;4, 5     5;109/2-40/6;5 

my script works fine moment need type common shelf positions. tried using .intersection, not working properly, when have positions consisting of double characters (pos:144-result: 14; pos:551, result: 51; pos:2222-result: 2 i.e)

result = id2_chars.intersection(id3_chars) 

any fix intersection? or maybe better method on mind?

code far:

part1 - merge every 2nd line together

exp = open('output.txt', 'w') open("dane.txt") f:     content = f.readlines()     strng = ""     in range(1,len(content)+1):         strng += content[i-1].strip()         if % 2 == 0:             exp.writelines(strng + '\n')             strng = ""  exp.close() 

part2 - intersection: exp = open('output2.txt', 'w')

imp = open('output.txt') line in imp:     none, lp1, dz1, poz1, lp2, dz2, poz2 = line.split(';')     s1 = poz1.lower()     s2 = poz2.lower()     s1_chars = set(s1)     s2_chars = set(s2)     result = s1_chars.intersection(s2_chars)     result = str(result)    exp.writelines(lp1 + ';' + dz1 + '-' + dz2 + ';' + result + '\n') exp.close() 

** did not filtered result needs yet (it in "list" form), won't problem once right intersection result

your main problem try intersect 2 sets of characters while should intersect positions. should @ least use:

... s1 = poz1.lower() s2 = poz2.lower() s1_poz= set(x.strip() x in s1.split(',')) s2_poz = set(x.strip() x in s1.split(',')) result = s1_poz.intersection(s2_poz) result = ', '.join(result) ... 

but in fact, whole processing in 1 single pass:

exp = open('output.txt', 'w') open("dane.txt") f:     old = none     line in f:               # 1 line @ time enough         line = line.strip()         if old none:          # first line of block, store             old = line         else:                    # second line of bock, process both             none, lp1, dz1, poz1 = old.split(';')             none, lp2, dz2, poz2 = line.split(';')             poz1x = set(x.strip() x in poz1.tolower().split(','))             poz2x = set(x.strip() x in poz2.tolower().split(','))             result = ', '.join(poz1x.intersection(poz2x))             exp.write(lp1 + ';' + dz1 + '-' + dz2 + ';' + result + '\n')             old = none