Solutions for the NameError: name ‘StringIO’ is not defined in Python

To fix the NameError: name ‘StringIO’ is not defined in Python, you must understand the cause of this error and then find a way to fix it. Check out our article to understand what causes the error and how to fix it effectively.

Cause of the NameError: name ‘StringIO’ is not defined in Python

To understand how the error appears, follow the example below.

newFile = StringIO('This is initial string.')
print(newFile.getvalue())

Output

NameError: name 'StringIO' is not defined

We used the constructor to create a StringIO object, and we got an error at that point. So what is its cause? After researching, we also found out that the reason is that this module does not exist in the current version. So to use this module, we need to import it to fix this error.

How to fix the NameError: name ‘StringIO’ is not defined in Python?

There are three ways to solve this error

• Use command import
• Use command from…import
• Use command from…import*

These ways are all about importing the module to use StringIO. We show you different import methods so you can apply them to your other exercises.

Use command import

To solve the error, please see our example to understand how we do it.

Example:

# Import io module
import io

# Create StringIO object
newFile = io.StringIO('Initialization String')

# Print message
print(newFile.getvalue())

Output:

Initialization String

We use this import statement to import the entire io module and initialize the StringIO object by io.StringIO. 

Use command from…import

Take a look at the example below:

# Import StringIO module from io module
from io import StringIO

# Create StringIO object
newFile = StringIO('Initialization String')

# Print message
print(newFile.getvalue())

Output

Initialization String

We use this from…import command to import only the StringIO module of the io module.

Use command from…import*

Take a look at the example below:

# Import the entire io module
from io import *

# Create StringIO object
newFile = StringIO('Initialization String')

# Print message
print(newFile.getvalue())

Output

Initialization String

We use this from…import* command to import the entire io module into. And we initialize the StringIO object with the constructor as shown in the example. From there, we can use all the properties, classes, and modules of the io module.

Summary

In this article, we have shown you how to fix the NameError: name ‘StringIO’ is not defined in Python by importing the module differently. Take a look at importing ways to apply each of your purposes. Our website has a lot of articles like this, so follow us to see such articles.

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Tom Joseph

My name is Tom Joseph, and I work as a software engineer. I enjoy programming and passing on my experience. C, C++, JAVA, and Python are my strong programming languages that I can share with everyone. In addition, I have also developed projects using Javascript, html, css.

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Name of the university: UTC
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