Why is `input` in Python 3 throwing NameError: name… is not defined

Question

Consider the below string test, 

test = raw_input("enter the test") 

print test

It works fine in Python 2.x

In python 3.x, I do:

test = input("enter the test") 

print test

When I give input string sdas, I get the following error message

Traceback (most recent call last):

 File "/home/ananiev/PycharmProjects/PigLatin/main.py", line 5, in <module>

    test = input("enter the test")

 File "<string>", line 1, in <module> 

NameError: name 'sdas' is not defined

Answer 1

In Python 3.x, the input() function behaves differently compared to Python 2.x's raw_input() function. In Python 3.x, the input() function evaluates the user's input as a Python expression, while in Python 2.x, raw_input() simply reads the input as a string.

To fix the error you're encountering in Python 3.x, you need to update your code as follows:

test = input("enter the test")

print(test)

By enclosing the input() function within print(), you ensure that the value entered by the user is displayed correctly.

Answer 2

You're executing your Python 3 code with a Python 2 mediator (interpreter). On the off chance that you weren't, your print explanation would hurl a SyntaxError before it at any point incited you for input. 

The outcome is that you're utilizing Python 2's input, which attempts to eval your information (apparently sdas), finds that it's invalid Python, and bites the dust

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Answer 3

In Python 3.x, the input() function behaves differently from Python 2.x's raw_input() function. In Python 3.x, input() interprets the user's input as a Python expression, while raw_input() in Python 2.x treats the input as a plain string.

To resolve the error you encountered in Python 3.x, you need to modify your code as follows:

test = input("Enter the test: ")

print(test)

By using print(test), you ensure that the user's input is displayed correctly.

Answer 4

In Python 3.x, the input() function works differently from Python 2.x's raw_input(). To fix the error, change raw_input() to input() and modify the print statement like this:

test = input("Enter the test: ")

print(test)

This change ensures that the user's input is interpreted correctly and displayed as intended.