object is not callable

An object is not callable if it is assigned a value that is the same name as a function.

Python type error 

TypeError: ‘float’ object is not callable

admin 3804 Views 0 Comments , , , , ,

So you have been presented with the TypeError: ‘float’ object is not callable in Python, but unsure how to fix? Well read on so we can get you a solution.

First things an overview of a Float

A float is any number that can contain a decimal place separating an integer from the fractions to the right of the decimal point.

As an example, in the below code, we have the exact same number. But when a computer comes to read it, it treats them differently, due to the fact that b has a decimal point and a fraction to the right of it.

a = 1
b = 1.0

print (type(a))
print (type(b))

Output:
<class 'int'>
<class 'float'>

So how in a piece of code would this error occur?

In the below code, the error occurs. The reason behind this is that float is an actual function that changes a value to a float data type.

As a result, you cannot assign a variable name as “float” and then call it separately in its code. Python specifically does not allow a programmer to use a function as a variable name.

a= float(10)
b= float(11)
c= float(12)
float = a

d = float(a/b*c)
print(d)

Output:
d = float(a/b*c)
TypeError: 'float' object is not callable

So how is this fixed?

In order to fix this, we rename the variable “float” to something else, and make sure that the new name is not another function name!

As can be seen when we do this, the below output runs as expected with no errors:

a= float(10)
b= float(11)
c= float(12)
float_value = a   ===> This line was corrected from above from "float" to "float_value"

d = float(a/b*c)
print(d)

Output: 
10.909090909090908

In summary the crux of this problem is that when creating a variable, it cannot be a function name.

You can see similar posts here on TypeErrors.

Have you seen these posts?

TypeError: ‘float’ object is not callable

TypeError: ‘int’ object is not callable

Python Functions type error 

TypeError: ‘str’ object is not callable

admin 6063 Views 0 Comments , , , ,

Estimated reading time: 2 minutes

This is a common TypeError that you will come across in Python, it is actually easy to diagnose how it occurred.

To start off we need to understand “str” is a function in python, and it converts any value into a string.

As a result , because it is a function your ability to call it has limitations.

So in essence it has parenthesis () beside it, and allows parameters to be passed to it.

So lets first look at how the string function works:

x = str("10")
y = 10

print(type(x))
print(type(y))
print(x)
print(y)

With output:
<class 'str'>
<class 'int'>
10
10

As you will see the above the value 10, on its own is an integer, but when you call the string function, it now becomes a string.

For this reason this , calling a string function , completes a conversion to string of ten, but what if the variable is called str?

Lets take an example below from an input:

str = input("what year where you born?")
print(str(str))

Output:

what year where you born?2021
Traceback (most recent call last):
  File "str obj is not callable.py", line 2, in <module>
    print(str(str))
TypeError: 'str' object is not callable

Process finished with exit code 1

The reason for this error above , is that we have named the variable “str”.

As can be seen the programme is trying to use the first str in the print statement as a function.

As we know by now string variables are not callable.

Accordingly the function str() which the programme is trying to run, fails with the TypeError identified.

For this reason to fix this problem we would change the variable called str to “year”, the error then disappears.

The updated code will work as when calling str(), it is not conflicted with a variable name.

year = input("what year where you born?")
print(str(year))

Output:
"str obj is not callable.py"
what year where you born?2021
2021

Process finished with exit code 0

So to summarise:

  • Strings are not callable
  • Don’t name a variable as str, or any function name, these are reserved words by the system.
  • Functions are callable, strings are not.