Add python shell to program

Question

I try to make game in python using pygame. It should be learning game, so I want to ask if it is possible to run python shell in game window or I have to program my own parser?

There are eval(), exec() functions. python3 -midlelib is implemented in Python. — jfs
– jfs, Commented Dec 29, 2014 at 8:49
@J.F.Sebastian please never recommend eval/exec without mentioning their serious security and performance implications; especially to obivious beginners like OP. Comments like yours are probably a contributor to the countless "I want to program a calculator with exec()" questions... OP, your question is too broad - you can embed all kinds of things into your game; as stated you can use exec/eval but that lets the user excecute arbitrary python code. Depending on what you want to do exactly, you could use the cmd module to create an interactive shell, and/or write a small parser for a DSL. — l4mpi
– l4mpi, Commented Dec 29, 2014 at 9:02
@l4mpi: OP explicitly asks about "python shell". Not calculator, not coffee machine but about python shell. Look at the author of this answer to "Evaluating a mathematical expression in a string" — jfs
– jfs, Commented Dec 29, 2014 at 9:05
@J.F.Sebastian and OP does not make clear that "python shell" means the same thing to them it means to you and me. Why would a "learning game" need the user to enter arbitrary python code? It's unclear if a python shell is really needed, and it's probably far from being the best tool for the job. Also, if OP does not know about exec/eval they also don't know about the security and performance implications (e.g. you can't restrict access to builtins), thus my comment still holds - you should probably default to linking to that excellent answer of yours when recommending eval/exec. — l4mpi
– l4mpi, Commented Dec 29, 2014 at 9:12
python3 -midlelib example makes it clear: what type of "python shell" I'm talking about. btw, I don't see security or performance mentioned in eval/exec docs. You could submit a documentation patch that discusses them (in a separate section with links from the corresponding functions). — jfs
– jfs, Commented Dec 29, 2014 at 10:00

Terry Jan Reedy · Accepted Answer · 2014-12-30 00:35:36Z

2

subprocess.Popen('python') will open a Python interpreter in a new window, similar to typing 'python' on a command line. But I suspect that this is not what you meant by 'in a game window'.

cmd.Cmd creates "A simple framework for writing line-oriented command interpreters" (that use verb object... syntax). It could be used for writing a text adventure game ('go east', 'open box', 'look room', etc).

code.InteractiveInterpreter is specifically for Python interpreters. It uses compile and exec. Idle's Shell is based on a subclass thereof defined in idlelib/PyShell.py. It simulates the Python interactive interpreter in a tkinter window. There is no need to re-write the parser included in compile; one can tell compile to stop with the abstract syntax tree that is the output of the parser.

answered Dec 30, 2014 at 0:35

Terry Jan Reedy

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