Get number of methods in a dex file contained in an apk.

dex.py

import zipfile
import sys

def methods_in_dex(dex_bytes):
	return int.from_bytes(dex_bytes[88:92], byteorder='little', signed=False)
	
def methods_in_apk(apkfile, dexfile='classes.dex'):
	with zipfile.ZipFile(apkfile, 'r') as apkzip:
		dex_bytes = apkzip.read(dexfile)
		return methods_in_dex(dex_bytes)
		
if __name__ == "__main__":
	print(methods_in_apk(sys.argv[1]))