Wie wiederhole ich, um falsche Benutzereingaben zu vermeiden?

Question

Hallo alle! Mein Ziel ist es, das Alter zu durchlaufen, so dass Male_cal oder Fem_cal (implizit) korrekt gedruckt werden. Bitte helfen Sie! Viel Dank -> Pythonidaer < -

print("\nWelcome to the Daily Caloric Intake Calculator!") 

Ich weiß nicht, wie man Schleife Alter wie ich Sex haben.

age = int(input("\nHow old are you in years? ")) 

sex = input("\nAre you a male or a female? Enter 'male' or 'female'. ").lower() 
if sex == "female" or sex == "f": 
    sex = "female" 
elif sex == "male" or sex == "m": 
    sex = "male" 
else: 
    sex = input("Sorry, there's only two choices: MALE or FEMALE. ").lower() 

Die Gleichung erfordert Alter eine ganze Zahl sein. Wie kann ich narrensicher sein?

height = float(input("\nHow tall are you in inches? ")) 
metric_height = float(height * 2.54) 
weight = float(input("\nWhat is your weight in pounds? ")) 
metric_weight = int(weight * 0.453592) 


activity_level = float(input(""" 
Please select your activity level: 

Sedentary (enter '1.2') 
Moderatively Active (enter '1.3') 
Active? (enter '1.4') 

""")) 

male_cal = 10 * metric_weight + 6.25 * metric_height - 5 * age - 161 
fem_cal = 10 * metric_weight + 6.25 * metric_height - 5 * age + 5 

if (sex == "male"): 

carbs = int(male_cal * .45) 
protein = int(male_cal * .20) 
fats = int(male_cal * .35) 
print("\nYour DCI should be: ", int(male_cal), "calories a day.") 
print(f"""\nThat means getting: 
{carbs} cals from carbs, 
{fats} cals from fats, and 
{protein} cals from protein.""") 
elif (sex == "female"): 

carbs = int(fem_cal * .45) 
protein = int(fem_cal * .20) 
fats = int(fem_cal * .35) 
print("\nYour DCI should be: ", int(fem_cal), "calories a day.") 
print(f"""\nThat means getting: 
{carbs} cals from carbs, 
{fats} cals from fats, and 
{protein} cals from protein.""") 

Answer 1

while True: 
    try: 
     age = int(input("\nHow old are you in years? ")) 
     break 
    except ValueError: 
     print('please put in a number') 

Dies sollte den Trick