# this file available at: https://arachnoid.com/files/python01/
import math
from typing import List

def beginner_error_00():
    print(f'{example}: Loop numeric float test error.')
    n = 1
    while n > -1:
        print(f'n = {n:18.15f} or {n:22.15e}')
        # test for zero
        if n == 0.0:
            break
        else:
            n -= .1

def beginner_error_01_append(mylist :List[str] = []):
    # a function default value is only applied
    # once, when the function is defined, not
    # each time the function is called.
    mylist.append("appended value")
    print(mylist)

def beginner_error_01():
    for _ in range(3):
        beginner_error_01_append()

def beginner_error_02():
    x = math.log(0)
    print(f'x = {x}')
    print('Function continues from here.')

def beginner_error_03():
    try:
        x = math.log(0)
        print(f'x = {x}')
    except:
        print('Something went wrong!')
        y = 1/0
        print(f'x = {y}')
    print('Function continues from here.')

def beginner_error_04():
    try:
        x = math.log(0)
        print(f'x = {x}')
    except Exception as err:
        print(f'Error: {err}')
        try:
            y = 1/0
            print(f'x = {y}')
        except Exception as err:
            print(f'Error: {err}')
    print('Function continues from here.')



errors = (
    beginner_error_00,
    beginner_error_01,
    beginner_error_02,
    beginner_error_03,
    beginner_error_04,
)

example = 4

errors[example]()