python的bytecode文件格式

1. bytecode file general format
------------------------------------------------
|   4 bytes    | 4 bytes            | ~
|magic number  | modification time  | byte codes
-----------------------------------------------

2. bytecode detail format
2.1 element type(grab from python)
#define TYPE_NULL               '0'
#define TYPE_NONE               'N'
#define TYPE_FALSE              'F'
#define TYPE_TRUE               'T'
#define TYPE_STOPITER           'S'
#define TYPE_ELLIPSIS           '.'
#define TYPE_INT                'i'
#define TYPE_INT64              'I'
#define TYPE_FLOAT              'f'
#define TYPE_BINARY_FLOAT       'g'
#define TYPE_COMPLEX            'x'
#define TYPE_BINARY_COMPLEX     'y'
#define TYPE_LONG               'l'
#define TYPE_STRING             's'
#define TYPE_TUPLE              '('
#define TYPE_LIST               '['
#define TYPE_DICT               '{'
#define TYPE_CODE               'c'
#define TYPE_UNICODE            'u'
#define TYPE_UNKNOWN            '?'
#define TYPE_SET                '<'
#define TYPE_FROZENSET          '>'

2.2 go through type by type
--TYPE_NULL, TYPE_NONE, TYPE_STOPITER, TYPE_ELLIPSIS, TYPE_FALSE, TYPE_TRUE
  just a byte of placeholder
--TYPE_INT
little endian
  |TYPE_INT|byte0|byte1|byte2|byte3|
--TYPE_INT64
  |TYPE_INT64|LOW 4 bytes|HIGH 4 bytes|
--TYPE_LONG
  TBD
--TYPE_FLOAT(ascii codec)
  |  byte 0   | byte 1 | byte 2...n|
  |TYPE_FLOAT|string length of float number|float string|
--TYPE_STRING
  |TYPE_STRING|string length(4bytes)|string|
--TYPE_TUPLE
  |TYPE_TUPLE|tuple length(4bytes)|objects|
--TYPE_LIST
  |TYPE_LIST|list length(4bytes)|objects|
--TYPE_DICT (null terminated)
  |TYPE_DICT|key|val|NULL|
--TYPE_SET
  |TYPE_SET|element number(4bytes)|element|
--TYPE_CODE
  |argument count|keyword argument count|locals number|stack size|
  |flags|code|consts|names|varnames|freevars|cellvars|file name|name|
  |fistlineno|line number table|