所以我现在正在学习Python,我编写了以下代码进行练习:
import time
from decimal import Decimal
name = input("\nPlease enter your name: ")
def bmi(weight, height):
bmi = weight/(height**2)
if bmi > 29.9:
report = "obese"
elif bmi <= 29.9 and bmi > 24.9:
report = "overweight"
elif bmi <= 24.9 and bmi > 18.5:
report = "normal"
elif bmi <= 18.5:
report = "underweight"
else:
report = "to be lying"
return (bmi, report)
while True:
weight = Decimal(input("\nEnter your weight (kg): "))
if weight == 0:
print("You can't have a weight of 0. Try again!")
continue
if weight < 0:
print("A negative weight? Really?")
continue
height = Decimal(input("Enter your height (cm): "))
height = height/100
bmi, report = bmi(weight, height)
bmi = round(bmi, 1)
time.sleep(1)
print("\n" + name.title() + ", according to your BMI (" + str(bmi) +
"), you are considered " + report + ".")
qprompt = input("\nDo you wish to quit? (y/n): ")
if qprompt == 'y':
break
else:
continue
这段代码似乎在while循环再次开始并且我输入了体重和身高后返回了错误。第一次可以正常运行,但是在我告诉它继续运行,然后输入重量和高度后,它崩溃了,并显示以下错误:
Traceback (most recent call last):
File "BMI2.py", line 33, in <module>
bmi, report = bmi(weight, height)
TypeError: 'decimal.Decimal' object is not callable
我想在这里寻求帮助,因为我无法弄清楚问题所在。 谢谢!
答案 0 :(得分:0)
您正在以不明确的方式使用符号bmi
。
执行bmi, report = bmi(weight, height)
时,实际上将覆盖此符号的使用,以作为对同名功能的引用。
因此,在第一次迭代中,它引用了一个函数,但是在第二次迭代中,它引用了一个(不可调用的)变量。
因此,运行时解释语言的优势对您不利。
答案 1 :(得分:0)
您正在写
bmi = round(bmi, 1)
这使bmi
成为数字。在循环的下一个迭代中,您编写
bmi, report = bmi(weight, height)
将其用作功能。
确定bmi
是否是结果函数的名称,并始终使用它