Entry Is Undefined Javascript

Michael Zippo 04.11.2021

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Python 3 has replaced Python 2’s raw_input () method with the input () method . If you try to use raw_input () in Python 3, you will encounter the error NameError: name ’raw_input’ undefined.

In this guide, we will discuss what this error means and why you may encounter it. We’ll look at an example of this error, along with a solution, so you can learn how to fix it.

NameError: the name ’raw_input’ is not defined

The raw_input () in Python 2 collects input from a user. This input can be converted to any data type, such as a string, an integer, or a floating point number.

Consider this code:

username = raw_input ("Enter a username:")

We can use this code to collect a username from a user in Python 2.

Being able to collect a user’s data means that you can make your programs interactive. You don’t just have to define all the data in the program you will be using. You can ask a user to provide data.

In Python 3, many changes have been made to the Python language. Among them is raw_input () which has been renamed to input (). Both functions collect data from sys.stdin (also called "standard input") and return this data to a program.

An example scenario

We will build a program that calculates the grade that a student obtained with his artistic assignment. The assignment is greater than 50, and students may be given an A, B, C, or Fail grade. To start, we ask our user to enter a note which we will calculate the note in words:

digital_grade = int (raw_input ( "Enter a note:"))

We use raw_input () to collect a vote of the user. the user must enter a note into our program before the rest of the program. We convert the value entered by a user to an integer so that we can do numeric comparisons later in our code. because raw_input () returns a default string.

We’ll use a if statement to calculate the note corresponding to the letter:

This statement will show both the letter and the number grade a student got.

Let’s run our code and see what happens:

Our code returns an error.

The solution

The error message tells us that we are referring to a value that does not exist. Since we u We are using Python 3.x to run our program, raw_input () does not exist.

To correct our code, we need to replace our raw_input () instruction with a input () instruction:

The raw_input () and input () instructions are functionally identical. This means that we don’t need to make any other changes to our code to make our codebase compatible with Python 3.x.

Let’s run our program with this change done:

Our code successfully calculates a student’s grade.

A note on the reassignment of the raw_input

A technically working solution is to assign the value of raw_input () to the input () function. We can do this using variable assignment . This will allow you to use a function called raw_input () in your Python 3 code.

Consider this example:

raw_input = input

This statement tells Python that the value of raw_input () must equal input () .

This is not a good solution because the official Python 3 documentation has gradually removed the name raw_input () in favor of input () . Some developers reading your code may be confused if they see raw_input () in a Python 3 codebase, slowing development time.

Conclusion

The NameError: the name ’raw_input’ is not defined an error is generated when trying to use the raw_input method () in Python 3. To correct this error, replace all instances of raw_input () with the input () function in the program.

You now have the knowledge to fix this error like a professional Python programmer!

We hope this article has helped you to resolve the problem. Apart from Entry Is Undefined Javascript, check other code Python module-related topics.