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  1. constructs = {
  2.     1: {
  3.         1: {
  4.             1: print
  5.         }
  6.     }
  7. }
  8.  
  9. def parse(code):
  10.     def parse_expr(index):
  11.         while index < size and code[index] == 0:
  12.             index += 1  # skip 0s
  13.         try:
  14.             call = []
  15.             while True:
  16.                 key1, key2, key3, pos = code[index: (next_index := index + 4)]
  17.                 if next_index < size and code[next_index] == 0:
  18.                     raise ValueError  # escape the token
  19.                 if not call:
  20.                     call.append(constructs[key1][key2][key3])
  21.                 if pos == -1:
  22.                     return call, next_index
  23.                 obj, index = parse_expr(next_index)
  24.                 call.append(obj)
  25.         except (ValueError, KeyError):
  26.             return code[index], index + 1
  27.     size = len(code)
  28.     index = 0
  29.     result = []
  30.     while index < size:
  31.         obj, index = parse_expr(index)
  32.         result.append(obj)
  33.     return result
  34.  
  35. print(parse([1, 1, 1, 1, 'Hello world', 1, 1, 1, 2, 'etc', 1, 1, 1, -1]))
  36. print(parse([1, 1, 1, 1, 1, 1, 1, 1, 'Hello world', 1, 1, 1, -1, 1, 1, 1, 2, 'etc', 1, 1, 1, -1]))
  37. print(parse([1, 1, 1, 1, 'a', 1, 1, 1, 2, 1, 1, 1, 1, 'b', 1, 1, 1, -1, 1, 1, 1, -1, 1, 1, 1, 1, 'c', 1, 1, 1, -1]))
Success #stdin #stdout 0.1s 14092KB
comments (?)
stdin 
Standard input is empty
stdout 
[[<built-in function print>, 'Hello world', 'etc']]
[[<built-in function print>, [<built-in function print>, 'Hello world'], 'etc']]
[[<built-in function print>, 'a', [<built-in function print>, 'b']], [<built-in function print>, 'c']]
https://ideone.com/4ct2KA
language:
Python 3 (python  3.12)
created:
187 days ago
visibility:
secret

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