我有這個問題

Question

def get_age():
    age = int(input())
    if age < 18 or age > 75:
        raise ValueError('Invalid age.')
    return age


def fat_burning_heart_rate(age):

    heart_rate = (220 * 0.70) - age
    return heart_rate

if __name__ == "__main__":
    try:
        heart_rate = fat_burning_heart_rate(age)
        age = get_age()
        print('Fat burning heart rate for a', age, 'year-old:', 
               heart_rate, 'bpm')

    except ValueError as e:
        print(e)
        print('Could not calculate heart rate info.')

到目前為止，我遇到的主要問題是當我 go 運行此代碼時，它會生成一個名稱錯誤，指出未定義“年齡”。 當我嘗試分配 heart_rate = fat_burning_heart_rate(age) 時會發生這種情況。 我懷疑這與我傳遞 function 參數的方式有關。 但是我能做些什么來解決它？

Answer 1

def fat_burning_heart_rate(age):

heart_rate = (220 * 0.70) - age
if age < 18 or age > 75:
    raise ValueError('Invalid age.')
return heart_rate, age

if __name__ == "__main__":
  try:
    age = int(input("Input age: "))
    heart_rate, age = fat_burning_heart_rate(age)
    print('Fat burning heart rate for a', age, 'year-old:',
          heart_rate, 'bpm')

except ValueError as e:
    print(e)
    print('Could not calculate heart rate info.') 

你不需要 get_age()。 您可以將該代碼添加到 fat_burning_heart_rate()。

Answer 2

age = get_age() 在代碼中似乎是錯誤的 position，而且我相信你誤解了心率的表達。 此代碼將允許兩種定義，並將正確標記任何錯誤。

def get_age():
    age = int(input())
    if age < 18 or age > 75:
        raise ValueError('Invalid age.')
    return age

def fat_burning_heart_rate(age):
    heart_rate = (220 - age) * .7
    return heart_rate


if __name__ == "__main__":
    try:
        age = get_age()
        heart_rate = fat_burning_heart_rate(age)
        print('Fat burning heart rate for a', age, 'year-old:', 
heart_rate, 'bpm')

    except ValueError as e:
        print(e)
        print('Could not calculate heart rate info.')

Answer 3

我用這段代碼解決了它。

def get_age():          #gets user input and checks to see if valid age range
    age = int(input())
    if age < 18 or age > 75:
        raise ValueError('Invalid age.')
    return age


def fat_burning_heart_rate(age):   #calc heart rate with given user input(age)
    heart_rate = (220 - age) * .70
    return heart_rate

if __name__ == "__main__":

    try:
        age = get_age()         #calls def get_age and fat_burning_heart_rate
        bpm = fat_burning_heart_rate(age)
        print('Fat burning heart rate for a', age, 'year-old:', bpm, 'bpm')
    except ValueError as excpt:
        print(excpt)
        print('Could not calculate heart rate info.')