I wrote this simple program to calculate one’s BMI. But I am unable to execute it complete. Below is my program,
PROGRAM
h = input("Please Enter your height in meters:")
q = raw_input("Do you want to enter your weight in kg or lbs?")
if q=="kg":
w1 = input("Please Enter your weight in kgs:")
bmi1 = w1/(h*h)
print "Your BMI is", bmi1
if bmi1 <= 18.5:
print "Your are underweight."
if bmi1 > 18.5 & bmi1 < 24.9:
print "Your weight is normal."
if bmi1 > 25 & bmi1 < 29.9:
print "Your are overweight"
if bmi1 >= 30:
print "Your are obese"
if q=="lbs":
w2 = input("Please Enter your weightin lbs:")
bmi2 = w2/((h*h)*(39.37*39.37)*703)
print "Your BMI is:", bmi2
if bmi2<= 18.5:
print "Your are underweight."
if bmi2>18.5 & bmi2<24.9:
print "Your weight is normal."
if bmi2>25 & bmi2<29.9:
print "Your are overweight"
if bmi2>=30:
print "Your are obese"
OUTPUT
Please Enter your height in meters:1.52
Do you want to enter your weight in kg or lbs?kg
Please Enter your weight in kgs:51
Your BMI is 22.074099723
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "bmi.py", line 11, in <module>
if bmi1 > 18.5 & bmi1 < 24.9:
TypeError: unsupported operand type(s) for &: 'float' and 'float'
Where am I going wrong? Anyone just let me know..
Thanks :).
asked Apr 20, 2012 at 12:39
& is a bitwise operator, I think you were looking for the boolean and.
But notice that Python also supports the following syntax:
if 18.5 < bmi1 < 24.9:
# ...
Since you seemed to have trobled with indentation this is how your script might look like:
h = raw_input("Please enter your height in meters: ")
h = float(h)
w_unit = raw_input("Do you want to enter your weight in kg or lbs? ")
w = raw_input("Please enter your weight in {}: ".format(w_unit))
w = int(w)
if w_unit == "kg":
bmi = w / (h*h)
elif w_unit == "lbs":
bmi = w / ((h*h) * (39.37 * 39.37) * 703)
print "Your BMI is {:.2f}".format(bmi)
if bmi <= 18.5:
print "Your are underweight."
elif 18.5 < bmi <= 25:
print "Your weight is normal."
elif 25 < bmi < 30:
print "Your are overweight"
elif bmi >= 30:
print "Your are obese"
There are a couple of slight improvements:
- The explicit conversion (since in Python 3 the
inputfunction behave likeraw_inputand there’s nothing like the Python 2input, it might be a good habit to write your input like that) - What really changes is the
bmivalue, so there’s no need to write two times the same thing.
Something left to do, might be wrap the whole script into functions 🙂
answered Apr 20, 2012 at 12:41
Rik PoggiRik Poggi
27.7k6 gold badges64 silver badges82 bronze badges
3
-
#1
1)Windows 10
2) Python 3.8
3) 
— нужно вычислить сумму.
Вот код, я только начал изучать Python, поэтому и не знаю, как решить такую задачу.
Код:
a=float(input("zadayte a="))
x=float(input("zadayte x="))
suma=(a+1/x+a+2/2*x^2+a+3/3*x^3)
print("suma")
4) Ошибка
suma=(a+1/x+a+2/2*x^2+a+3/3*x^3)
TypeError: unsupported operand type(s) for ^: ‘float’ and ‘float’
-
#2
в питоне степень это **
Python:
a = float(input("zadayte a="))
x = float(input("zadayte x="))
suma = (a + 1 / x + a + 2 / 2 * x ** 2 + a + 3 / 3 * x ** 3)
print(suma)но это вашу задачу не решает…
-
#3
в питоне степень это
**Python:
a = float(input("zadayte a=")) x = float(input("zadayte x=")) suma = (a + 1 / x + a + 2 / 2 * x ** 2 + a + 3 / 3 * x ** 3) print(suma)но это вашу задачу не решает…
Не подскажете, что нужно изменить в коде?
-
#4
добавить переменную ‘n’ и в цикле складывать дроби до значения ‘n’…
-
#5
Python:
def go(a, x, n):
return sum((a + i) / (i * x**i) for i in range(1, n+1))I’m attempting to compute the class_weights for an highly imbalanced set of 9 classes based on the examples discussed in How to set class weights for imbalanced classes in Keras?. Here is the code:
import numpy as np
import math
# labels_dict : {ind_label: count_label}
# mu : parameter to tune
def create_class_weight(labels_dict,mu=0.15):
total = np.sum(labels_dict.values())
keys = labels_dict.keys()
class_weight = dict()
for key in keys:
score = math.log(mu*total/float(labels_dict[key]))
class_weight[key] = score if score > 1.0 else 1.0
return class_weight
# random labels_dict
labels_dict = {0: 3400, 1: 1700, 2: 4700, 3: 6800, 4: 3400, 5: 2300, 6: 8300, 7: 1000, 8:9600}
create_class_weight(labels_dict)
I’m getting an error log like this:
File "<ipython-input-34-7a9feda1053b>", line 20, in <module>
create_class_weight(labels_dict)
File "<ipython-input-34-7a9feda1053b>", line 11, in create_class_weight
score = math.log(mu*total/float(labels_dict[key]))
TypeError: unsupported operand type(s) for *: 'float' and 'dict_values'
I’m running the code with Python 3.6.3. What modifications am I supposed to make?
& — это побитовый оператор, я думаю, вы искали логическое значение and.
Но обратите внимание, что Python также поддерживает следующий синтаксис:
if 18.5 < bmi1 < 24.9:
# ...
Поскольку вы, похоже, столкнулись с отступами, вот как может выглядеть ваш скрипт:
h = raw_input("Please enter your height in meters: ")
h = float(h)
w_unit = raw_input("Do you want to enter your weight in kg or lbs? ")
w = raw_input("Please enter your weight in {}: ".format(w_unit))
w = int(w)
if w_unit == "kg":
bmi = w / (h*h)
elif w_unit == "lbs":
bmi = w / ((h*h) * (39.37 * 39.37) * 703)
print "Your BMI is {:.2f}".format(bmi)
if bmi <= 18.5:
print "Your are underweight."
elif 18.5 < bmi <= 25:
print "Your weight is normal."
elif 25 < bmi < 30:
print "Your are overweight"
elif bmi >= 30:
print "Your are obese"
Есть пара небольших улучшений:
- Явное преобразование (поскольку в Python 3
inputфункция ведет себя какraw_inputи нет ничего лучше Python 2input, это может быть хорошей привычкой писать свой вклад таким образом) - Что действительно меняется, так это
bmiзначение, поэтому нет необходимости писать два раза одно и то же.
Осталось кое-что сделать, возможно, весь скрипт завернуть в функции 🙂