this is probably the disassembled python bytecode obtained by decompyle . You can generate similar data as follows:
>>> import code, dis
>>> c = code.compile_command('x = []; x.append("foo")')
>>> dis.disassemble(c)
1 0 BUILD_LIST 0
3 STORE_NAME 0 (x)
6 LOAD_NAME 0 (x)
9 LOAD_ATTR 1 (append)
12 LOAD_CONST 0 ('foo')
15 CALL_FUNCTION 1
18 PRINT_EXPR
19 LOAD_CONST 1 (None)
Supplement file contents similar?
the bytecode disassembler is practically not useful, but can be used (and used by the disassembler decompiler) if you want to try to restore the python source code from the .pyc file.
UPDATE
eg. at startup
$ decompyle --showasm -o ./ app.pyc
app.pyc_dis, -, , :
0 BUILD_LIST_0 ''
3 STORE_NAME 'x'
6 LOAD_NAME 'x'
9 LOAD_ATTR 'append'
12 LOAD_CONST 'foo'
15 CALL_FUNCTION_1 ''
18 POP_TOP ''
19 LOAD_CONST ''
22 RETURN_VALUE ''
x = []
x.append('foo')