using locks in multithreading in python3

[noisefloor]

Hi,

couple of remarks on the code:

• Don't use global. In 99% of all cases it's a clear indication that the design pattern of your code is not good. global can be avoided in most cases.
  
• In case you need a lock within your class, make it an attribute of you class.
  
• The lock doesn't make sense here anyway at all, as there is no concurrent operation on anything.
  
• Your are using a very old school way of string formating... Use the string's format() method or for Python >= 3.6 f-strings.
  

Regards, noisefloor