Python module to modify bytecode
Project description
bytecode is a Python module to modify bytecode.
bytecode project homepage at GitHub (code, bugs)
Download latest bytecode release at the Python Cheeseshop (PyPI)
Install bytecode: pip install bytecode.
bytecode only works on Python 3.
Hello World
Example running print('Hello World!'):
from bytecode import Instr, Bytecode
bytecode = Bytecode()
bytecode.extend([Instr("LOAD_NAME", 'print'),
Instr("LOAD_CONST", 'Hello World!'),
Instr("CALL_FUNCTION", 1),
Instr("POP_TOP"),
Instr("LOAD_CONST", None),
Instr("RETURN_VALUE")])
code = bytecode.to_code()
exec(code)
Output:
Hello World!
API
bytecode module version string: bytecode.__version__ (ex: '0.1').
Instruction
Instr: abstract instruction, argument is not validated
ConcreteInstr: concrete instruction, argument must be an integer
Create instructions
Instr(name, arg=UNSET, *, lineno=None)
ConcreteInstr(name, arg=UNSET, *, lineno=None)
Instr.disassemble(code, offset)
ConcreteInstr.disassemble(code, offset)
Pseudo instructions
Label: target of jumps for Bytecode, must not be used in ConcreteBytecode
SetLineno: set the line number of following instructions
Bytecode
Bytecode: list of Instr
BytecodeBlocks: list of blocks, a block is a list of Instr and has a label
ConcreteBytecode: list of ConcreteInstr
Create bytecode
Bytecode.from_code(*, extended_arg_op=False)
BytecodeBlocks.from_code()
ConcreteBytecode.from_code()
Conversions
bytecode.to_bytecode() -> Bytecode
bytecode.to_concrete_bytecode() -> ConcreteBytecode
bytecode.to_bytecode_blocks() -> BytecodeBlocks
bytecode.to_code() -> types.CodeType
ChangeLog
2016-02-26: Version 0.1
Rewrite completely the API!
2016-02-23: Release 0.0
First public release
See also
Release history Release notifications | RSS feed
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