python-3.x - 如何使用一个变量中定义的变量并将其用作另一个变量中的参数？

Question

我想在第一个函数中调用使用total的值，并在其他两个函数中将其用作参数。但这似乎不起作用，因为它会产生名称错误。

def all_total():
    '''Calculates and displays the total including
country and s6ales tax'''
    total = float(input('Enter the subtotal of the purchase: '))
    county_tax(total)
    print('County Tax Amount: $'+county_tax())
    state_tax(total)
    print('State Tax Amount: $'+state_tax())
    total += (county_amount + state_amount)

def county_tax(arg1):
    '''Calculates the county tax of the total'''
    county_tax = float(input('Enter the county tax in percent form: '))
    county_amount = county_tax/100*total
    return county_amount

def state_tax(arg1):
    '''Calculates the state tax of the total'''
    state_tax = float(input('Enter the state tax in percent form: '))
    state_amount = state_tax/100*total
    return state_amount

all_total()



Enter the subtotal of the purchase: 200
Enter the county tax in percent form: .025
Traceback (most recent call last):
  File "E:/Bronx Science/Sophomore/Computer Science_Python/Edwin Chen_Lab 9_Sales Tax.py", line 29, in <module>
    all_total()
  File "E:/Bronx Science/Sophomore/Computer Science_Python/Edwin Chen_Lab 9_Sales Tax.py", line 11, in all_total
    county_tax(total)
  File "E:/Bronx Science/Sophomore/Computer Science_Python/Edwin Chen_Lab 9_Sales Tax.py", line 20, in county_tax
    county_amount = county_tax/100*total
NameError: name 'total' is not defined

Answer 1

尝试这个

def all_total():
    '''Calculates and displays the total including
country and s6ales tax'''
    total = float(input('Enter the subtotal of the purchase: '))
    county_amount = county_tax(total)
    print('County Tax Amount: ${}'.format(county_amount))
    state_amount = state_tax(total)
    print('State Tax Amount: ${}'.format(state_amount))
    total += county_amount + state_amount

def county_tax(arg1):
    '''Calculates the county tax of the total'''
    county_tax = float(input('Enter the county tax in percent form: '))
    county_amount = county_tax/100*arg1
    return county_amount

def state_tax(arg1):
    '''Calculates the state tax of the total'''
    state_tax = float(input('Enter the state tax in percent form: '))
    state_amount = state_tax/100*arg1
    return state_amount

all_total()