interpreter | basic interpreter written for a programming languages class | Interpreter library

Werkzeug released v2.1.0 today, removing werkzeug.security.safe_str_cmp.

You can probably resolve this issue by pinning Werkzeug~=2.0.0 in your requirements.txt file (or similar).

Just ran into the same issue - you need to instantiate a ManagedVirtualDevice object and configure it, before adding it to your devices list:

Now you have cmd' of type Console (MaybeT IO a), and want to pass it to a function taking Console (IO a). The first thing you can do is to run the MaybeT monad inside Console and get Console (IO (Maybe a)). You can do this by fmapping runMaybeT.

Once you got Console (IO (Maybe a)), you can pass it to runConsole and get IO (Maybe a). Now, you can lift it to MaybeT IO a using MaybeT.

So it'll be something like this.

Try using, cmd ="py C:\Python27\Tools\Scripts\\2to3.py "+file_path+" -w"

1. Yes, CPython is compiled to bytecode which is then executed by the virtual machine.
2. The virtual machine executes instructions one-by-one. It's written in C (but you can write it in another language) and looks like a huge if/else statement like "if the current instruction is this, do this; if the instruction is this, do another thing", and so on. Instructions aren't translated to binary - that's why it's called an interpreter.
   1. You can find the list of instructions here: https://docs.python.org/3.10/library/dis.html#python-bytecode-instructions
   2. The implementation of the VM is available here: https://github.com/python/cpython/blob/f71a69aa9209cf67cc1060051b147d6afa379bba/Python/ceval.c#L1718
3. Bytecode doesn't have a concept of "line": it's just a stream of bytes. The interpreter can read one byte at a time and use another if/else statement to decide what instruction it's looking at. For example:

No, JavaScript doesn't have a "stricter" mode that would have warned you of this. Some linters might (though ESLint doesn't seem to, at least with the demo page's default settings).

TypeScript would have, though (example), since window.parent isn't a string or Symbol, so doesn't make sense as the left-hand operand of in. Adopting TypeScript has costs, of course, but it does have benefits like this.

I think it is already working actually, but you are in fact not catching the correct error. In your code you have:

I got the same problem. Open your terminal and write this:

Reading the docs better, I think there's the answer:

The mechanism used by the CPython interpreter to assure that only one thread executes Python bytecode at a time. This simplifies the CPython implementation by making the object model (including critical built-in types such as dict) implicitly safe against concurrent access. Locking the entire interpreter makes it easier for the interpreter to be multi-threaded, at the expense of much of the parallelism afforded by multi-processor machines.

However, some extension modules, either standard or third-party, are designed so as to release the GIL when doing computationally-intensive tasks such as compression or hashing. Also, the GIL is always released when doing I/O.

I don't know the internals, but guess each line or block of this bytecode is executed alone, and other threads are waiting (which makes it slow). But some lines consist of multiple blocks, and aren't atomic.

Here's what you get if run dis.dis('x[0] += 1'):