let’s say i have a function like this: I want to pass a dict like this to the function as the only argument. which should change the values of the a and c arguments but b still remains the default value. since foo is in an external library i don’t want to change the function itself. is there any w…
Tag: parameter-passing
Output is an empty file
My code does not throw an error, it simply creates the files, but of which are empty. I tried it from the command line, and it works using the wildcard training_set_pssm/*.pssm path, but I must do it from the IDE because it is not printing the correct output anyway. The input file is a set of checkpoint files…
Hardcode RF Codes in rpi-rf_send script + python raspberry pi
I’d like to hardcode the RF Code in the rpi-rf_send.py send script so I can repeatedly activate the same device automatically. I’ve reviewed all of the documentation and I cannot find any clear method to do that. Docs: https://pypi.org/project/rpi-rf/ https://github.com/milaq/rpi-rf It works well …
How to pass 1 argument each from 2 functions into 1 function?
I’ve tried to understand how and why I haven’t seen any answers to this specific question. I have two functions each has an argument path Just ignore everything these functions actually do, cause everything works just perfectly until I want to pass on name & site to the following create_new_sb…
Python unpack different elements in tuple into *args
I want to convert it into something like this: so that I can pass it into another function Answer You could use iterable unpacking to do this. You can unpack an iterable by prefixing it with * when passing it into a function. foo(int(var[0]), *var[1]) would give you what you want.
Pass nested dictionary location as parameter in Python
If I have a nested dictionary I can get a key by indexing like so: Am I able to pass that indexing as a function parameter? Obviously, this is incorrect, I get TypeError: list indices must be integers, not str. How can I do it correctly? Answer You can use reduce (or functools.reduce in python 3), but that wo…
What do the * (star) and ** (double star) operators mean in a function call?
In code like zip(*x) or f(**k), what do the * and ** respectively mean? How does Python implement that behaviour, and what are the performance implications? See also: Expanding tuples into arguments. Please use that one to close questions where OP needs to use * on an argument and doesn’t know it exists…
How do I pass a variable by reference?
Are parameters passed by reference or by value? How do I pass by reference so that the code below outputs ‘Changed’ instead of ‘Original’? See also: Why can a function modify some arguments as perceived by the caller, but not others? Answer Arguments are passed by assignment. The ratio…