Question

import calories

height = calories.get_non_negative_int("Please enter your height: ")
weight = calories.get_non_negative_int("Please enter your weight: ")
age = calories.get_non_negative_int("Please enter your age: ")
print()

again = 'y'
while again == 'y':
    print('What would you like to do ?')
    print('To find out the calories you need per day to sustain your weight press 1.')
    print('To enter a calorie amount and calculate how many minutes of RUNNING required to burn those calories press 2.')
    print('To enter a calorie amount and calculate how many minutes of JOGGING required to burn those calories press 3.')
    print('To enter a calorie amount and calculate how many minutes of WALKING required to burn those calories press 4.\n')
    selection = calories.get_selection('Please enter the number of your selection (1-4): ')

    if selection == 1:
        print('You need to burn', calories.standardCalBurn(height, weight, age), 'calories per day to sustain your current weight.\n')
        again = input('Would you like to calculate more? (y/n): ')

    if selection == 2:
        weight = global weight
        caloriesToBurnOff = int(input('Please enter the amount of calories you would like to calculate: '))
        calsBurnedPerMinRunning = calories.burnedRunning(weight)
        print(calories.timeRequiredRun(caloriesToBurnOff, calsBurnedPerMinRunning))

在我的代码中，在第二行到最后一行的位置显示calsBurnedPerMinRunning = calories.burnedRunning(weight)，python告诉我weight未定义，当我已经向用户询问变量时。我尝试在它面前添加global并且没有运气。我现在很难过，希望得到任何帮助。

编辑：-----

以下是我正在使用的当前代码

import calories
height = calories.get_non_negative_int("Please enter your height: ")
weight = calories.get_non_negative_int("Please enter your weight: ")
age = calories.get_non_negative_int("Please enter your age: ")
print()

again = 'y'
while again == 'y':
    print('What would you like to do ?')
    print('To find out the calories you need per day to sustain your weight press 1.')
    print('To enter a calorie amount and calculate how many minutes of RUNNING required to burn those calories press 2.')
    print('To enter a calorie amount and calculate how many minutes of JOGGING required to burn those calories press 3.')
    print('To enter a calorie amount and calculate how many minutes of WALKING required to burn those calories press 4.\n')
    selection = calories.get_selection('Please enter the number of your selection (1-4): ')

    if selection == 1:
        print('You need to burn', calories.standardCalBurn(height, weight, age), 'calories per day to sustain your current weight.\n')
        again = input('Would you like to calculate more? (y/n): ')

    if selection == 2:
        caloriesToBurnOff = int(input('Please enter the amount of calories you would like to calculate: '))
        calsBurnedPerMinRunning = calories.burnedRunning(weight)
        print(calories.timeRequiredRun(caloriesToBurnOff, calsBurnedPerMinRunning))

以下是##

的功能

##calories.py -- function definitions ##
## Michael Melendez
## March 3, 2018

def standardCalBurn(height, weight, age):
    calsNeededPerDay = 655 + (4.3 * weight) + (4.7 * height) - (4.7 * age)
    return calsNeededPerDay

def burnedRunning(weight):
    calsBurnedPerMinRunning = weight * 0.095 
    return calsBurnedPerMinRunning

def burnedJogging(weight):
    calsBurnedPerMinJogging = weight * 0.0775
    return calsBurnedPerMinJogging

def burnedWalking(weight):
    calsBurnedPerMinWalking = weight * 0.054
    return calsBurnedPerMinWalking

def timeRequiredRun(caloriesToBurnOff, calsBurnedPerMinRunning):
    calsBurnedPerMinRunning = burnedRunning(weight)
    time = caloriesToBurnOff / calsBurnedPerMinRunning
    #print(time)
    return timeRequiredRun

def timeRequiredJog(caloriesToBurnOff, calsBurnedPerMinJogging):
    calsBurnedPerMinJogging = burnedJogging(weight)
    time = caloriesToBurnOff / calsBurnedPerMinJogging
    #print(time)
    return timeRequiredJog

def timeRequiredWalk(caloriesToBurnOff, calsBurnedPerMinWalking):
    calsBurnedPerMinWalking = burnedWalking(weight)
    time = caloriesToBurnOff / calsBurnedPerMinWalking
    #print(time)
    return timeRequiredWalk

#-------------------------------------#
def get_non_negative_int(prompt):
    while True:
        try:
            value = int(input(prompt))
        except ValueError:
            print("Error, please enter a valid value.")
            continue

        if value < 1:
            print("Error, please enter a valid number.")
            continue
        else:
            break
    return value

def get_selection(prompt):
    while True:
        try:
            value = int(input(prompt))
        except ValueError:
            print("Error, please enter a valid value.")
            continue

        if value < 1 or value > 4:
            print("Error, please make a valid selection.")
            continue
        else:
            break
    return value

以下是我收到的追溯错误：

Traceback (most recent call last):
  File "/Users/michaelmelendez/Desktop/Vicky's Gym/Vicky.py", line 23, in <module>
    print(calories.timeRequiredRun(caloriesToBurnOff, calsBurnedPerMinRunning))
  File "/Users/michaelmelendez/Desktop/Vicky's Gym/calories.py", line 22, in timeRequiredRun
    calsBurnedPerMinRunning = burnedRunning(weight)
NameError: name 'weight' is not defined

Answer 1

将weight = global weight替换为global weight

Answer 2

您甚至不需要global，因为您的脚本中没有任何内容引入范围。正确的解决方法不是将weight = global weight替换为global weight，而是完全删除该行。

- 编辑 -

请仔细查看错误消息。

Traceback (most recent call last):
  File "main.py", line 26, in <module>
    print(calories.timeRequiredRun(caloriesToBurnOff, calsBurnedPerMinRunning))
  File "/path/to/calories.py", line 22, in timeRequiredRun
    calsBurnedPerMinRunning = burnedRunning(weight)
NameError: global name 'weight' is not defined

检查calories.py的第22行。

Answer 3

你不能在同一行中定义和分配全局变量

试试这个

global weight
weight = 5

Python声称我的变量没有定义？

以下是我正在使用的当前代码

以下是##

3 个答案: