Undefined name 'self' in ./util/stat/is_exec/is_exec.py

[cclauss]

flake8 testing of https://github.com/Tencent/HaboMalHunter on Python 2.7.14

$ flake8 . --count --select=E901,E999,F821,F822,F823 --show-source --statistics

./AnalyzeControl.py:556:15: F821 undefined name 'main_dynamic'
		dest_file = main_dynamic
              ^
./AnalyzeControl.py:560:43: F821 undefined name 'main_dynamic'
		log.info("main dynamic log updated %s", main_dynamic)
                                          ^
./util/stat/is_exec/is_exec.py:40:4: F821 undefined name 'self'
			self.log.error("CalledProcessError: %s",str(e))
   ^
3     F821 undefined name 'main_dynamic'
3