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  1. #!/usr/bin/python3
  2. import os
  3.  
  4. def     find_pair(n, pos):
  5.         n_keys = list(n.keys())
  6.  
  7.         with open("output{}.txt".format(pos), "w") as fout:
  8.                 fout.truncate()
  9.                 while n_keys:
  10.                         lead = n_keys.pop(0)
  11.                         group = [lead]
  12.  
  13.                         for i in range(10):
  14.                                 s = lead[:pos] + str(i) + lead[pos+1:];
  15.                                 if s in n_keys:
  16.                                         group.append(s)
  17.                                         n_keys.remove(s)
  18.  
  19.                         if len(group)>1:
  20.                                 for i in group:
  21.                                         print("{} ==> {}".format(i, n[i][9]), file=fout)
  22.                                 print(file=fout)
  23.  
  24. if __name__ == '__main__':
  25.         with open("charno.txt", "r") as fin:
  26.                 text = fin.read()
  27.  
  28.         x = text.split()
  29.  
  30.         n = {}
  31.         for i in x:
  32.                 index = i[0:9]
  33.                 n[index] = i
  34.  
  35.         for i in range(0, 9):
  36.                 find_pair(n, i)
  37.  
  38. # End of differential.py
Runtime error #stdin #stdout #stderr 0.14s 23356KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
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Traceback (most recent call last):
  File "./prog.py", line 25, in <module>
FileNotFoundError: [Errno 2] No such file or directory: 'charno.txt'
https://ideone.com/24noQ6
language:
Python 3 (python  3.12)
created:
3 years ago
visibility:
secret

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