14.4. Executing Other (Python) Programs
When we discuss the execution of other programs, we distinguish between Python programs and all other non-Python programs, which includes binary executables or other scripting language source code. We will cover how to run other Python programs first, then how to use the os module to invoke external programs.
14.4.1. Import
During run-time, there are a number of ways to execute another Python script. As we discussed in an earlier chapter, importing a module the first time will cause the code at the top-level of that module to execute. This is the behavior of Python importing, whether desired or not. We remind you that the only code that belongs to the top-level of a module are global variables, and class ...
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