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devfzn 2023-11-09 17:45:00 -03:00
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__pycache__/

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# Python by Example
Guia interactiva con la resolución de los retos propuestos en el libro
[Python by Example](https://www.google.cl/books/edition/Python_by_Example/gDGdDwAAQBAJ)
de *Nichola Lacey*
## Retos básicos
- [001-011](./basic/basic01.py)
- [012-019](./basic/basic02.py)
- [020-026](./basic/basic03.py)
- [027-034](./basic/basic04.py)
## Uso
```sh
git clone https://gitea.kickto.net/devfzn/python_by_example.git
cd python_by_example
python main.py
```

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__init__.py Normal file
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from . import basic01 as ex01
from . import basic02 as ex02
from . import basic03 as ex03
from . import basic04 as ex04
from common.common import (
print_challenges,
user_input,
run_func,
clear
)
def challenges_sublist():
choices = 4
select_ok = False
while not select_ok:
clear()
selection = user_input(choices)
match selection:
case 1:
challenges01()
case 2:
challenges02()
case 3:
challenges03()
case 4:
challenges04()
case 5:
pass
case 6:
pass
case 7:
pass
case 8:
pass
case 9:
pass
case 10:
pass
case 11:
pass
case 'v':
return
case 's':
exit(0)
case _:
continue
def challenges01():
select_ok = False
while not select_ok:
clear()
i, ex1 = print_challenges(ex01.basics_001)
selection = user_input(i)
match selection:
case 1:
run_func(ex1.hola)
case 2:
run_func(ex1.hola2)
case 3:
run_func(ex1.pez)
case 4:
run_func(ex1.dos_nums)
case 5:
run_func(ex1.tres_nums)
case 6:
run_func(ex1.pizza)
case 7:
run_func(ex1.next_age)
case 8:
run_func(ex1.a_medias)
case 9:
run_func(ex1.tiempos)
case 10:
run_func(ex1.pounds)
case 11:
run_func(ex1.cabe)
case 'v':
return
case 's':
select_ok = True
exit(0)
case _:
continue
def challenges02():
select_ok = False
while not select_ok:
clear()
i, ex2 = print_challenges(ex02.basics_002)
selection = user_input(i)
match selection:
case 1:
run_func(ex2.mayor)
case 2:
run_func(ex2.muy_alto)
case 3:
run_func(ex2.gracias)
case 4:
run_func(ex2.fav_color)
case 5:
run_func(ex2.clima)
case 6:
run_func(ex2.edad_conducir)
case 7:
run_func(ex2.alto_bajo)
case 8:
run_func(ex2.uno_dos_tres)
case 'v':
return
case 's':
exit(0)
case _:
continue
def challenges03():
select_ok = False
while not select_ok:
clear()
i, ex3 = print_challenges(ex03.basics_003)
selection = user_input(i)
match selection:
case 1:
run_func(ex3.name_length)
case 2:
run_func(ex3.fullname_length)
case 3:
run_func(ex3.full_name_lower)
case 4:
run_func(ex3.nursery)
case 5:
run_func(ex3.any_mayus)
case 6:
run_func(ex3.mambo_name)
case 7:
run_func(ex3.pig_latin)
case 'v':
return
case 's':
exit(0)
case _:
continue
def challenges04():
select_ok = False
while not select_ok:
clear()
i, ex4 = print_challenges(ex04.basics_004)
selection = user_input(i)
match selection:
case 1:
run_func(ex4.decims)
case 2:
run_func(ex4.decims_round)
case 3:
run_func(ex4.square_root)
case 4:
run_func(ex4.pi_round)
case 5:
run_func(ex4.circle_area)
case 6:
run_func(ex4.cyl_vol)
case 7:
run_func(ex4.friendly_div)
case 8:
run_func(ex4.circ_trian)
case 'v':
return
case 's':
exit(0)
case _:
continue

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class basics_001:
def hola(self):
"Ask for the user's first name and display the output message"
nombre = input("Ingresa tu primer nombre: ")
print(f"Hola {nombre}")
def hola2(self):
"""Ask for the user’s first name and then ask for their surname
and display the output message Hello [First Name] [Surname]."""
nombre = input("Ingresa tu primer nombre: ")
apellido = input("Ingresa tu apellido: ")
print(f"Hola {nombre} {apellido}")
def pez(self):
"""Write code that will display the joke \"What do you call a bear
with no teeth?\" and on the next line display the answer \"A gummy bear!\"
Try to create it using only one line of code."""
print("¿Que es algo y nada a la vez?\nEl pez")
def dos_nums(self):
"""Ask the user to enter two numbers. Add them together and display
the answer as The total is [answer]."""
print("Ingresa dos números")
num_a = int(input("Primer número: "))
num_b = int(input("Segundo número: "))
print(f"{num_a} + {num_b} = {num_a+num_b}")
def tres_nums(self):
"""Ask the user to enter three numbers. Add together the first two
numbers and then multiply this total by the third. Display the answer as
The answer is [answer]."""
print("Ingresa tres números")
num_a = int(input("Primer número: "))
num_b = int(input("Segundo número: "))
num_c = int(input("Tercer número: "))
res = (num_a+num_b)*num_c
print(f"({num_a} + {num_b}) x {num_c} = {res}")
def pizza(self):
"""Ask how many slices of pizza the user started with and ask how
many slices they have eaten. Work out how many slices they have left and
display the answer in a user-friendly format."""
num_a = int(input("¿Cuantos pedazos de pizza tenías?: "))
num_b = int(input("¿Cuantos pedazos de pizza comiste?: "))
print(f"Aún quedan {num_a-num_b} pedazos")
def next_age(self):
"""Ask the user for their name and their age. Add 1 to their age
and display the output [Name] next birthday you will be [new age]."""
name = input("¿Cual es tu nombre?: ")
age = int(input("¿Que edad tienes?: "))
print(f"{name} en tu próximo cumpleaños tendrás {age+1}")
def a_medias(self):
"""Ask for the total price of the bill, then ask how many diners
there are. Divide the total bill by the number of diners and show how
much each person must pay."""
total = int(input("¿Cuanto es el total de la cuenta?: "))
personas = int(input("¿Cuantas personas son?: "))
print(f"Cada uno debe pagar ${total/personas}")
def tiempos(self):
"""Write a program that will ask for a number of days and then will
show how many hours, minutes and seconds are in that number of days."""
dias = int(input("Ingresa una cantidad de días: "))
horas = dias*24
minutos = horas*60
segundos = minutos*60
print(f"{dias} Días es equivalente a {horas} horas, "
+f"o {minutos} minutos, o {segundos} segundos.")
def pounds(self):
"""There are 2,204 pounds in a kilogram. Ask the user to enter a
weight in kilograms and convert it to pounds."""
peso = int(input("Ingresa un peso en Kilogramos: "))
libras = peso*2.204
print(f"{peso} kilogramos equivalen a {libras} libras")
def cabe(self):
"""Task the user to enter a number over 100 and then enter a number
under 10 and tell them how many times the smaller number goes into the
larger number in a user-friendly format."""
num, num2 = 0, 100
while num <= 100:
num = int(input("Ingresa un número mayor que 100: "))
while num2 >= 10:
num2 = int(input("Ingresa un número menor que 10: "))
print(f"{num2} cabe {num//num2} veces en {num}")

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class basics_002():
def mayor(self):
"""Ask for two numbers. If the first one is larger than the second, display
the second number first and then the first number, otherwise show the first
number first and then the second."""
num_1 = int(input("Ingresa un número :"))
num_2 = int(input("Ingresa otro número :"))
if num_1 > num_2:
print(f"{num_2} {num_1}")
elif num_1 < num_2:
print(f"{num_1} {num_2}")
else:
print(f"{num_1} = {num_2}")
def muy_alto(self):
"""Ask the user to enter a number that is under 20. If they enter a number that
is 20 or more, display the message “Too high”, otherwise display “Thank you”."""
num = int(input("Ingresa un número menor que 20: "))
if num >= 20:
print("Muy Alto!")
else:
print("Gracias")
def gracias(self):
"""Ask the user to enter a number between 10 and 20 (inclusive). If they enter a
number within this range, display the message “Thank you”, otherwise display the
message “Incorrect answer”."""
num = int(input("Ingresa un número entre 10 y 20: "))
if 10 <= num <= 20:
print("Gracias")
else:
print("El número no es válido")
def fav_color(self):
"""Ask the user to enter their favourite colour. If they enter “red”, “RED” or
“Red” display the message “I like red too”, otherwise display the message
“I don’t like [colour], I prefer red”."""
color = input("¿Cual es tu color favorito?: ")
match color.lower():
case "rojo":
print(f"A mi también me gusta el {color.capitalize()}")
case _:
print(f"No me gusta el {color.capitalize()}, prefiero el Rojo")
def clima(self):
"""Ask the user if it is raining and convert their answer to lower case
so it doesn’t matter what case they type it in. If they answer “yes”,
ask if it is windy. If they answer “yes” to this second question,
display the answer “It is too windy for an umbrella”, otherwise
display the message “Take an umbrella”. If they did not answer yes
to the first question, display the answer “Enjoy your day”."""
llueve = input("¿Está lloviendo?: ").lower()
if llueve == "si":
viento = input("¿Hay viento?: ").lower()
if viento == "si":
print("Es mala idea llevar paraguas")
else:
print("Lleva tu paraguas")
else:
print("Disfruta del día")
def edad_conducir(self):
"""Ask the user’s age. If they are 18 or over, display the message \"You
can vote\", if they are aged 17, display the message \"You can learn to
drive\", if they are 16, display the message \"You can buy a lottery
ticket\", if they are under 16, display the message \"You can go
Trick-or-Treating\"."""
edad = int(input("Ingresa tu edad: "))
if edad >= 18:
print("Puedes votar")
if edad == 17:
print("Puedes aprender a conducir")
if edad == 16:
print("Puedes comprar un ticket de azar")
if edad < 16:
print("Puedes salir ir jugar en la arena")
def alto_bajo(self):
"""Ask the user to enter a number. If it is under 10, display the message
\"Too low\", if their number is between 10 and 20, display \"Correct\",
otherwise display \"Too high\""""
num = int(input("Ingresa un número: "))
if num < 10:
print("El número es muy bajo")
elif 10 <= num <= 20:
print("Correcto")
else:
print("Muy alto")
def uno_dos_tres(self):
"""Ask the user to enter 1, 2 or 3. If they enter a 1, display the message
\"Thank you\", if they enter a 2, display \"Well done\", if they enter a 3,
display \"Correct\". If they enter anything else, display \"Error message\"."""
num = int(input("Ingresa 1 , 2 o 3: "))
match num:
case 1:
print("Gracias")
case 2:
print("Bién hecho")
case 3:
print("Correcto")
case _:
print("Error")

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class basics_003:
def name_length(self):
"""Ask the user to enter their first name and then display the length of
their name."""
name = input("Ingresa tu primer nombre: ")
print(f"{name} tiene {len(name)} letras")
def fullname_length(self):
"""Ask the user to enter their first name and then ask them to enter
their surname. Join them together with a space between and display the
name and the length of whole name."""
name = input("Ingresa tu primer nombre: ")
surname = input("Ingresa tu apellido: ")
length = len(name) + len(surname)
print(f"\'{name} {surname}\' tiene {length} letras")
def full_name_lower(self):
"""Ask the user to enter their first name and surname in lower case.
Change the case to title case and join them together. Display the
finished result."""
name = input("Ingresa tu primer nombre en minúsculas: ").title()
surname = input("Ingresa tu apellido en minúsculas: ").title()
print(f"{name} {surname}")
def nursery(self):
"""Ask the user to type in the first line of a nursery rhyme and display
the length of the string. Ask for a starting number and an ending number
and then display just that section of the text."""
rhyme = input("Escribe la primera linea de una canción de cuna: ")
print("Tiene {len(rhyme)} letras")
ini_num = int(input("Ingresa un número inicial"))
end_num = int(input("Ingresa un número final"))
sel = rhyme[ini_num:end_num]
print(sel)
def any_mayus(self):
"""Ask the user to type in any word and display it in upper case."""
anyword = input("Ingresa cualquier palabra: ").upper()
print(anyword)
def mambo_name(self):
"""Ask the user to enter their first name. If the length of their first
name is under five characters, ask them to enter their surname and join
them together (without a space) and display the name in upper case. If
the length of the first name is five or more characters, display their
first name in lower case."""
name = input("Ingresa tu primer nombre: ")
if len(name) < 5:
surname = input("Ingresa tu apellido: ")
fullname = (name+surname).upper()
print(fullname)
else:
print(name.lower())
def pig_latin(self):
"""Pig Latin takes the first consonant of a word, moves it to the end of
the word and adds on an \"ay\". If a word begins with a vowel you just
add \"way\" to the end. For example, pig becomes igpay, banana becomes
ananabay, and aadvark becomes aadvarkway. Create a program that will ask
the user to enter a word and change it into Pig Latin. Make sure the new
word is displayed in lower case."""
word = input("Ingresa una palabra: ").lower()
if word[0:1] in 'aeiou':
piglatin = word+'way'
else:
piglatin = word[1:]+word[0]+'ay'
print(piglatin)

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class basics_004:
def decims(self):
"""Ask the user to enter a number with lots of decimal places. Multiply
this number by two and display the answer."""
num = float(input("Ingresa un número con muchos decimales: "))
print(num*2)
def decims_round(self):
"""Update last program so that it will display the answer to two decimal
places."""
num = float(input("Ingresa un número con muchos decimales: "))
numr = round(num*2, 2)
print(numr)
def square_root(self):
"""Ask the user to enter an integer that is over 500. Work out the
square root of that number and display it to two decimal places."""
from math import sqrt
num = int("Ingresa un número entero mayor de 500: ")
root = round(sqrt(num), 2)
print(root)
def pi_round(self):
"""Display pi (π) to five decimal places."""
from math import pi
print(round(pi,5))
def circle_area(self):
"""Ask the user to enter the radius of a circle. Work out the area of
the circle (π*radius2)."""
from math import pi
radio = float(input("Ingresa el radio de la circunferencia: "))
area = pi*(radio**2)
print(f"El area de la circunferencia es {round(area, 3)}")
def cyl_vol(self):
"""Ask for the radius and the depth of a cylinder and work out the total
volume (circle area*depth) rounded to three decimal places."""
from math import pi
radio = float(input("Ingresa el radio del cilindro: "))
largo = float(input("Ingresa el largo del cilindro: "))
area = pi*(radio**2)
volumen = round(area*largo, 3)
print(f"El volumen del cilindro es {volumen}")
def friendly_div(self):
"""Ask the user to enter two numbers. Use whole number division to divide
the first number by the second and also work out the remainder and
display the answer in a user-friendly way (e.g. if they enter 7 and 2
display \"7 divided by 2 is 3 with 1 remaining\")."""
num_1 = float(input("Ingresa un número: "))
num_2 = float(input("Ingresa otro número: "))
res_1 = num_1//num_2
res_2 = num_1%num_2
print(f"{num_2} cabe {res_1} veces en {num_1}, y sobran {res_2} ")
def circ_trian(self):
"""Display the following message:
1) Square
2) Triangle
Enter a number:
If the user enters 1, then it should ask them for the length of one of
its sides and display the area. If they select 2, it should ask for the
base and height of the triangle and display the area. If they type in
anything else, it should give them a suitable error message"""
print(" 1) Cuadrado\n 2) Triangulo\n")
choice = input(" Ingresa un número: ")
match choice:
case '1':
side = int(input("Ingresa el largo del cuadrado: "))
print(f"El area del cuadrado es {side*side}")
case '2':
base = int(input("Ingresa la base del triagulo: "))
altura = int(input("Ingresa la altura del triagulo: "))
area = round((base*altura)/2, 3)
print(f"El area del triangulo rectángulo es {area}")
case _:
print("Debes escoger una opción válida")

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import os
from time import sleep
clear = lambda: os.system('clear') if os.name == 'posix' else os.system('cls')
tab='\n'+' '*4
def excp_handler(function):
def wrapper(*args, **kwargs):
try:
function(*args, **kwargs)
except Exception:
print("Lee atentamente las instrucciones e intenta nuevamente")
sleep(3)
return wrapper
def opcs_default():
print(""" v) Volver
s) Salir""")
def enter_continue():
input("\n\tPresiona Enter para continuar\n")
@excp_handler
def run_func(func):
print(tab, func.__doc__, '\n')
func()
enter_continue()
def user_input(i):
try:
selection = input("\n Ingresa una opción: ")
if selection in 'sSvV':
return selection.lower()
selection = int(selection)
if 0 < selection <= i:
clear()
return selection
else:
raise Exception
except Exception:
print("Debes ingresar una opción válida")
sleep(2)
return 0
def print_challenges(exercises):
ex = exercises()
i = 0
funcs = list(vars(exercises))[1:-3]
while i < len(funcs):
print(f"{i+1}) ".rjust(8), end='')
print(vars(exercises).get(funcs[i]).__doc__)
i+=1
opcs_default()
return i, ex

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#!/usr/bin/env python
from basic import basic
from common.common import clear, user_input, opcs_default
def toc():
content="""\tContenido\n
1) Basicos 001-059
2) Intermedio 060-123
3) Tkinter 124-138
4) SQLite 139-145
...
s) Salir
"""
print(content)
def basic_challenges():
content = """
1) Basics 001-011
2) Basics 012-019
3) Basics 020-026
4) Basics 027-034
5) Basics 035-044
6) Basics 045-051
7) Basics 052-059
"""
select_ok = False
while not select_ok:
clear()
print(content)
opcs_default()
selection = user_input(5)
match selection:
case 1:
basic.challenges01()
case 2:
basic.challenges02()
case 3:
basic.challenges03()
case 4:
basic.challenges04()
case 5:
pass
case 6:
pass
case 7:
pass
case 'v':
return
case 's':
exit(0)
case _:
continue
def interm_challenges():
content = """
1) Interm 060-068
2) Interm 069-079
3) Interm 080-087
4) Interm 088-095
5) Interm 096-103
6) Interm 105-110
7) Interm 111-117
8) Interm 118-123
"""
print(content)
def tkinter_challenges():
content = """
1) Tkinter 124-132
2) Tkinter 133-138
"""
print(content)
def main():
clear()
header = """
=======================================
\"Learning to Program in 150 Challenges\"
Python by example, Nichola Lacey
=======================================
programmed by devfzn@gmail.com
---------------------------------------\n"""
select_ok = False
while not select_ok:
clear()
print(header)
toc()
selection = user_input(5)
match selection:
case 1:
basic_challenges()
case 2:
interm_challenges()
case 3:
tkinter_challenges()
case 4:
pass
case 5:
pass
case 6:
pass
case 7:
pass
case 8:
pass
case 9:
pass
case 10:
pass
case 's':
select_ok = True
exit(0)
case _:
select_ok = False
if __name__ == '__main__':
main()