Circular Import
In this document I will introduce how circular import commonly arise and what are the main ways to fix them.
Python
Stop or Kill a Thread
It is generally a bad pattern to kill a thread abruptly, in Python, and in any language.
The nice way of handling this, if you are managing your own thread, is to have an exit flag that each thread checks on a regular interval to see if it is time to exit:
Source Code Batch Changes
Sometimes, existing code needs to be modified in batches, and these operations are too complex to be achieved through the IDE's replacement function.
AST is a good choice to do that.
BFS and DFS in Dict Traversal
I answered such a question on Stack Overflow: How do I extract all keys from this JSON file?
Retrieve all the dict keys from a dict whose values consist of multiple Iterable obj.
Capturing Grep Real-Time Output
Using subprocess.Popen to execute persistent commands and parse the standard output in real-time is a common practice, for example: