DalyaG

# When you want to add a new parameter, you only need to add in 2 places:

# In params.py:
class Params:
    ...
    my_new_param: float = 42
        

# At the "end-point" where this parameter is used:
class VeryDeepModule:

DalyaG

from my_project_params import Params

class SomeMidProcessModule:
    def __init__(self, params: Params):
        self.params: Params = params  # Now, if params is None, we will get an error!
    
    def run(self):
        do_somaething(self.params.some_configurable_value)

DalyaG

from my_project_params import Params

class SomeMidProcessModule:
    def __init__(self, params: Params = None):
        self.params: Params = params or Params()  # NO! BAD! if we don't input an instace of Params, 
                                                  # we will create a new instance with only default values.
    
    def run(self):
        do_somaething(self.params.some_configurable_value)

DalyaG

#!/usr/bin/env python3
from optparse import OptionParser

from my_project import MyProject
from my_project_params import Params


if __name__ == "__main__":
    parser = OptionParser()

DalyaG

from my_project_params import Params

class MyProject:
    def __init__(self, params: Params):
        self.params: Params = params

    def run(self):
        ...

DalyaG

import json
import os
from datetime import datetime
from optparse import OptionParser

from dataclasses import dataclass


@dataclass
class Params:

DalyaG

from IPython.core.display import display, HTML
display(HTML("<style>.container { width:95% !important; }</style>"))
display(HTML("<style>.output_result { max-width:90% !important; }</style>"))

import numpy as np
np.set_printoptions(precision=3)
np.set_printoptions(linewidth=170)
np.set_printoptions(suppress=True)
np.random.seed(42)

DalyaG

#include <iostream>
using namespace std;

int main() {
    int arr[5];
    arr[0] = 1;
    cout << "arr[0]=" << arr[0] << endl;
    *arr = 2;
    cout << "arr[0]=" << arr[0] << endl;

DalyaG

#include <iostream>
using namespace std;

void change_val(int &z);

int main() {
    int a = 1;
    int *b = &a;
    int &c = *b;
    cout << "c is an alias of whatever b points to\n";

DalyaG

#include <iostream>
using namespace std;

void change_val(int &z);

int main() {
    int a = 1;
    int *b = &a;
    int c = *b;
    cout << "c is an integer that takes the value that b points to\n";