Retos de Python

print("a", "b", "c", sep="-", end="!")

Print("hola")

print(7 // 2, 7 % 2)

edad = input("Edad: ")  # el usuario escribe 20
print(edad + 1)

print(bool("False"), bool(0), bool(" "))

precio = 7.9
print(int(precio), round(precio))

print(divmod(125, 60))

print("" or "Invitado", 0 and 10)

print(round(2.5), round(3.5))

print(2 + 3 * 2 ** 2)

palabra = "Python"
print(palabra[1:4])

nombre = "  ana "
nombre.strip()
print(len(nombre))

print("2024".isdigit(), "-5".isdigit())

print("banana".find("n"), "banana".count("a"))

dia = "lunes"
if dia == "sábado" or "domingo":
    print("Fin de semana")
else:
    print("Laborable")

nota = 9.5
if nota >= 5:
    print("Aprobado")
elif nota >= 9:
    print("Sobresaliente")
else:
    print("Suspenso")

for i in range(1, 4):
    print(i)

for n in [1, 3, 5]:
    if n % 2 == 0:
        print("Hay un par")
        break
else:
    print("Sin pares")

for i in range(1, 5):
    total = 0
    total += i
print(total)

frutas = ["pera", "uva", "kiwi"]
print(frutas[-1])

numeros = [3, 1, 2]
numeros.append(5)
print(len(numeros))

a = [1, 2]
b = a
b.append(3)
print(a)

notas = [3, 1, 2]
notas = notas.sort()
print(notas)

dato = ("hola")
print(type(dato))

a = {1, 2, 3, 4}
b = {3, 4, 5}
print(sorted(a - b), sorted(a & b))

numeros = [3, 1, 3, 2, 1, 3]
print(len(set(numeros)))

producto = {"nombre": "Libro", "precio": 12}

alumno = {"nombre": "Marta", "edad": 21}
print("Marta" in alumno, alumno.get("email", "-"))

a = {"x": 1, "y": 2}
b = {"y": 5, "z": 3}
print(a | b)

notas = [4, 7, 5, 9]
print(["A" if n >= 5 else "S" for n in notas])

print([n * 2 for n in range(6) if n % 2])

g = (x for x in [1, 2, 3])
print(sum(g), sum(g))

def doble(n):
    n * 2

print(doble(4))

def agregar(item, lista=[]):
    lista.append(item)
    return lista

agregar("a")
print(agregar("b"))

def precio_final(precio, iva=0.21):
    return round(precio * (1 + iva), 2)

print(precio_final(100, iva=0.10), precio_final(iva=0, precio=50))

def f(a, b=[]):
    b.append(a)
    return len(b)

print(f(1), f(2), f(3))

def g(*a, **k):
    return len(a), len(k)

print(g(1, 2, x=3))

def h():
    n = 0
    def i():
        nonlocal n
        n += 2
        return n
    return i

c = h()
c()
print(c())

def f(x):
    try:
        r = 10 / x
    except ZeroDivisionError:
        print("A")
    else:
        print("B")
    finally:
        print("C")

f(0)

try:
    n = int("5") + "1"
except ValueError:
    print("valor")
except TypeError:
    print("tipo")

# saludos.py
print("cargando", __name__)

if __name__ == "__main__":
    print("prueba")

from collections import Counter
print(Counter("banana").most_common(1))

with open("t.txt", "w", encoding="utf-8") as f:
    f.write("uno\n")
with open("t.txt", "w", encoding="utf-8") as f:
    f.write("dos\n")
with open("t.txt", "a", encoding="utf-8") as f:
    f.write("tres\n")

print(open("t.txt", encoding="utf-8").read().splitlines())

class Contador:
    total = 0
    def __init__(self):
        self.total += 1

a = Contador()
b = Contador()
print(Contador.total, a.total)

from dataclasses import dataclass

@dataclass
class Punto:
    x: int
    y: int = 0

print(Punto(3) == Punto(3, 0))

class A:
    def saludo(self):
        return "A"

class B(A):
    def saludo(self):
        return "B" + super().saludo()

class C(B):
    pass

print(C().saludo())

class Caja:
    def __init__(self, n):
        self.n = n

print(Caja(5) == Caja(5))

from datetime import date, timedelta

inicio = date(2026, 2, 20)
fin = inicio + timedelta(days=10)
print(fin)

from datetime import datetime

d = datetime(2026, 7, 5, 9, 8)
print(d.strftime("%d/%M/%Y"))

from datetime import date

print((date(2027, 1, 1) - date(2026, 12, 25)).days)