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import dis
import io
import marshal
import os
import sys
import textwrap
from bytecode import fix_spacing, format_bytecode
def disassemble_pyc_file(pyc_file) -> str:
with open(pyc_file, "rb") as f:
header = f.read(16)
magic_number = header[:2]
if 3394 != int.from_bytes(magic_number, "little"):
print(f"{pyc_file} not compiled with Python 3.7")
return None
bytecode = marshal.load(f)
original_stdout = sys.stdout
string_output = io.StringIO()
sys.stdout = string_output
dis.dis(bytecode)
sys.stdout = original_stdout
disassembled_pyc = string_output.getvalue()
byte_code = fix_spacing(textwrap.dedent(str(disassembled_pyc)).strip())
formatted_bytecode = format_bytecode(bytecode=byte_code)
return formatted_bytecode
def convert_pyc_to_bytecode(file_path: str):
formatted_bytecode = disassemble_pyc_file(file_path)
if formatted_bytecode is None:
return
with open(file_path + "b", "w") as bytecode_file:
print(f"Converted {file_path} to bytecode")
bytecode_file.write(formatted_bytecode)
if __name__ == "__main__":
path = sys.argv[1]
if os.path.isfile(path) and path.endswith(".pyc"):
convert_pyc_to_bytecode(path)
elif os.path.isdir(path):
for root, _, files in os.walk(path):
for file in files:
file_path = os.path.join(root, file)
if not file.endswith(".pyc"):
continue
convert_pyc_to_bytecode(file_path)
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