pocketpy/docs/quick-start/overview.md

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code	Overview	95

pkpy's C++ interfaces are organized in an object-oriented way. All classes are located in pkpy namespace.

The most important class is the VM class. A VM instance is a python virtual machine which holds all necessary runtime states, including callstacks, modules, variables, etc.

You need to use the C++ new operator to create a VM instance.

VM* vm = new VM();

The constructor can take 2 extra parameters.

VM(bool use_stdio=true, bool enable_os=true)

• use_stdio, if true, the print() function outputs string to stdout. Error messages will be send to stderr; If false, they will be sent to an internal buffer. In the latter case, you need to read them via read_output manually.
• enable_os, whether to enable OS-related features or not. This setting controls the availability of some priviledged modules such os io and os as well as builtin function open.