clean up util.py

video_metadata/util.py

@@ -1,4 +1,5 @@
 
+from inspect import currentframe, getframeinfo
 import logging
 import sys
 import yaml
@@ -24,21 +25,15 @@ def getLogger(is_debug):
     logger.addHandler(handler)
     return logger
 
-
 def getFunctionName():
-    import sys
     return sys._getframe(1).f_code.co_name
 
-
 # TODO: make output prettier
 def dumpObject(obj):
     return yaml.dump(obj)
 
-
 def getCurrentFileName() -> str:
-    from inspect import currentframe, getframeinfo
     return currentframe().f_back.f_code.co_filename
 
 def getLineNum() -> int:
-    from inspect import currentframe, getframeinfo
     return currentframe().f_back.f_lineno