Efficient way to loop through variables with number patterns in Python and append to a list? Question: so my variables are these: answer1, answer2, answer3, answer4, …, answer20 and I want to append all of them to a list in order. is there a neat way to do this? I can just use extend and …
Python – Unexpected behaviour when accessing variable inside function that is defined outside function Question: This results in UnboundLocalError: cannot access local variable ‘ans’ where it is not associated with a value. def a(): ans = 4 def traverse(): if ans == 2: pass if True: ans = 3 traverse() print(ans) a() This prints out …
How do I have a Python 3 program check if changing a variable's type would cause a crash before trying to change the type? Question: I’m making a custom subroutine called userinput() in order to replace input(). I haven’t tried anything as I have no clue what to try. The program crashes when I try …
How to encode a dictionary then write it to a file then decode it to then set it as variables? Question: So, I am creating a game where there are some variables like: Have they got x paper, have they done this room, what they have in their inventory. As seen here: Code1 And then …
How to access a variable which has a colon in its name in Python? Question: I created this code below to extract each individual key as separate data frames. However, since the prim_keys contains colon in their name, e.g. ‘5091016:2’, the resulting dataframes should be named something like data5091016:2. But, it is impossible to access …
How to assign a list of instance methods to a class variable? Question: I have this class which works: class Point: def __init__(self): self.checks = [self.check1, self.check2] def check1(self): return True def check2(self): return True def run_all_checks(self): for check in self.checks: check() The instance variable checks is not specific to instances, so I want to …
Resolving internal variables in YAML file Question: I have a YAML file which uses keys as references/variables in different sections as in the following example. download: input_data_dir: ./data/input prepare: input_dir: ${download.input_data_dir} output_dir: ./data/prepared process: version: 1 output_dir: ./output/${process.version} I tried loading the YAML file in Python params = yaml.safe_load(open("../params.yaml")). This outputs ${download.input_data_dir} for params[‘prepare’][‘input_dir’], while …
Save variable from my PC to .txt file on Remote Windows Server using Python + WMI Question: I have a Python script on my PC with the variable x. I would like to write x‘s value to a .txt file on Remote Windows Server 2019. I launched this Python code on my PC: import wmi …
making dynamically named variables in python Question: im new to python and im creating a program as sort of a practice exercise. It manages your plants around your house and tells you things like when to water them etc. Currently im working on the section that allows you to add a new plant. The problem …
Why some methods we can apply to an object and define it in a variable, but for some we cant? Question: if we have a file, we can read the lines and store it in a variable. such as: with open(‘test.py’, ‘r’) as file: f = file.readlines() however, for some methods we can’t add it …
