Help me please, code error

Question

while True:
print('options:')
print('addition: a')
print('substraction: b')
print('multiply: c')
print('divide: d')
input=(input(': '))

if input=='end':
break
elif input=='a':
a = float(input("Enter a number: "))
b =float(input("Enter a number: "))
c =str(a+b)
print('answer is : '+c)
elif input=='b':
a=float(input('Enter a number'))
b=float(input('enter a number'))
c=a-b
print('answer is : '+c)
elif input=='c':
a=float(input('enter a number'))
b=float(input('enter a number'))
c=a*b
print('answer is : '+c)
elif input=='d':
a=float(input('enter a number'))
b=float(input('enter a number'))
c=a/b
print('answer is : '+c)
else:
print('unknown input')

I get this error:
Traceback (most recent call last):
File "ifprogram.py", line 12, in <module>
a = float(input("Enter a number: "))
TypeError: 'str' object is not callable

I tried to google it bud no help there, I am new to python and have no idea what can be wrong. Thank you for help.

Answer 1

I delete my wrong answer to avoid it confuses others

Answer 2

The problem is that input (the variable) is the same name as the input function.
Change
input = (input(': '))
To:
userInput = (input(': '))
Or something like that,
then fix the if statements to match that name.
Works fine for me with that fix.

You can't have same named things in Python, whether it be a function or variable.
This is because when you say input = ...; you're re-assigning input from a function to some string.
Note* most other languages don't work this way.

Answer 3

Thank you so much,i am good to go now