Python – how do I call external python programs?

If you want to call each as a Python script, you can do import subprocess subprocess.call([“python”, “myscript.py”]) subprocess.call([“python”, “myscript2.py”]) But a better way is to call functions you’ve written in other scripts, like this: import myscript import myscript2 myscript.function_from_script1() myscript2.function_from_script2() Where function_from_script1() etc are defined in the myscript.py and myscript2.py files. See this page on … Read more

what’s the difference between ‘call/apply’ and ‘bind’ [duplicate]

bind returns a function which will act like the original function but with this predefined. It is usually used when you want to pass a function to an event handler or other async callback. call and apply will call a function immediately letting you specify both the value of this and any arguments the function … Read more

Are modern C++ compilers able to avoid calling a const function twice under some conditions?

GCC has the pure attribute (used as __attribute__((pure))) for functions which tells the compiler that redundant calls can be eliminated. It’s used e.g. on strlen. I’m not aware of any compiler doing this automatically, especially considering the fact that the functions to be called may not be available in source form, and the object file … Read more

Is there a way to not wait for a system() command to finish? (in c) [duplicate]

system() simply passes its argument to the shell (on Unix-like systems, usually /bin/sh). Try this: int a = system(“python -m plotter &”); Of course the value returned by system() won’t be the exit status of the python script, since it won’t have finished yet. This is likely to work only on Unix-like systems (probably including … Read more

Call function from DLL?

Depends on what type of DLL. Is this built in .NET ? if it is unmanaged code then here is an example otherwise the Answer from Rob will work. Unmanaged C++ dll example: using System; using System.Runtime.InteropServices; You may need to use DllImport [DllImport(@”C:\Cadence\SPB_16.5\tools\bin\mpsc.dll”)] static extern void mpscExit(); or [DllImport(“user32.dll”, CharSet = CharSet.Unicode)] public static … Read more

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