Daniel Arbuckle's Mastering Python

Manager

A manager represents a special process with only one job-keeping track of the variables that other processes need.

Accessing variables stored in a manager is much slower than accessing a process's local variables and it could lead to situations where processes trying to access variables at the same time slow each other down. On the other hand, if we actually need shared variables, at least the manager handles them correctly and as efficiently as possible.

Now, managers can handle many types of data, but we're going to focus on their ability to store dictionaries, lists, and namespaces.

Normally, when we send an object to another process, the other process actually gets a copy of that object; this means if the other process changes ...