The new with statement was first introduced in Python 2.5 and has been in use for quite some time. However, there still seems to be confusion regarding its usage, even for experienced Python programmers. The with statement is most commonly used as a context manager that properly manages resources, which is essential in concurrent and parallel programming, where resources are shared across different entities in the concurrent or parallel application.
Context management
Starting from managing files
As an experienced Python user, you have probably seen the with statement being used to open and read external files inside Python programs. Looking at this problem at a lower level, the operation of opening an external file in Python...
