How to Fix – NameError: name ‘array’ is not defined

If you are a Python programmer, you might have experienced the mistake message “NameError name ‘variety’ is not specified” while collaborating with the variety component in Python. In this tutorial, we will certainly check out the feasible reasons for this mistake and also supply detailed directions on just how to repair it.

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We will certainly cover usual reasons for the mistake and also supply remedies to assist you obtain your code up and also running rapidly. So, allow’s get going!

Why does the NameError: name 'variety' is not defined mistake happen?

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This mistake happens when you attempt to utilize the variety collection in your Python code, however Python can not locate the variety component in its namespace. The adhering to are a few of the situations in which this mistake generally happens.

1. You have not imported the variety component.
2. You have imported the variety component utilizing a various name.

Just how to deal with the NameError: name 'variety' is not defined?

what is the variety component in python?

The array component in Python offers a means to shop and also control selections of information much more successfully than utilizing a listing. Given that this collection belongs to the Python Criterion Collection, you do not require to individually mount it. You can just import it and also begin utilizing it.

It permits you to develop selections of a certain information kind, such as integers or drifts, and also do procedures on them overall. The array component is specifically helpful when handling big quantities of mathematical information, as it can be much quicker and also much more memory-efficient than utilizing a listing.

Let’s currently take a look at the above situations that might result right into the above mistake carefully.

The array component is not imported

It can take place that you are attempting to utilize the array component without also importing it. This is due to the fact that Python does not identify the array collection and also its features till it is imported right into the code.

As an example, allow’s attempt to utilize the array component without importing it and also see what we obtain.

 # keep in mind that the variety component is not imported
# develop a variety of integers
my_array = array.array(' i', [1, 2, 3, 4, 5]).
# publish the variety.
print( my_array) 

Output:

 ---------------------------------------------------------------------------.
NameError Traceback (latest phone call last).
Cell In[1], line 4.
1 # keep in mind that the variety component is not imported.
2.
3 # develop a variety of integers.
-- > 4 my_array = array.array(' i', [1, 2, 3, 4, 5]).
6 # publish the variety.
7 print( my_array).
NameError: name 'variety' is not defined

We obtain a NameError specifying that the name array is not specified. To utilize the array collection, you require to import it very first.

 import variety.
# develop a variety of integers.
my_array = array.array(' i', [1, 2, 3, 4, 5]).
# publish the variety.
print( my_array) 

Output:

 variety(' i', [1, 2, 3, 4, 5]) 

Here, we are importing the array component initially and afterwards utilizing it to develop a variety of integers. You can see that we did not obtain any kind of mistakes below.

Note that the array() feature is specified in the array component. This might be complicated due to the fact that they both have the exact same name. If you wish to utilize the array() feature, you can either utilize the above phrase structure of importing the whole array component and afterwards utilizing array. variety() feature or you might just import the array() feature like in the instance listed below.

 from variety import variety.
# develop a variety of integers.
my_array = variety(' i', [1, 2, 3, 4, 5]).
# publish the variety.
print( my_array) 

Output:

 variety(' i', [1, 2, 3, 4, 5]) 

We obtain the exact same outcome.

The array component is imported utilizing a various name

If you import the variety component utilizing a various name, for instance import variety as arr, and afterwards attempt to utilize the name “variety” to utilize it, you will certainly obtain a NameError due to the fact that the name “variety” is not specified in your present namespace.

Let’s take a look at an instance.

 import variety as arr.
# develop a variety of integers.
my_array = array.array(' i', [1, 2, 3, 4, 5]).
# publish the variety.
print( my_array) 

Output:

 ---------------------------------------------------------------------------.
NameError Traceback (latest phone call last).
Cell In[1], line 4.
1 import variety as arr.
3 # develop a variety of integers.
-- > 4 my_array = array.array(' i', [1, 2, 3, 4, 5]).
6 # publish the variety.
7 print( my_array).
NameError: name 'variety' is not defined

We obtain a NameError: name 'variety' is not defined. This is due to the fact that we have actually imported the array component with the name arr however we’re attempting to utilize it utilizing the name array.

To repair this mistake, you can either accessibility array utilizing the name that you have actually made use of in the import declaration or import array without an alias.

 import variety as arr.
# develop a variety of integers.
my_array = arr.array(' i', [1, 2, 3, 4, 5]).
# publish the variety.
print( my_array) 

Output:

 variety(' i', [1, 2, 3, 4, 5]) 

In the above instance, we are importing array as arr and afterwards utilizing arr to access the array component’s approaches.

Conversely, as seen in the instance in the previous area, you can import array with no pen names and also just utilize array to prevent the NameError.

Side Note– Think about utilizing Numpy arrays

If you are collaborating with selections in Python past the fundamental variety procedures, you may wish to think about utilizing Numpy selections rather. Numpy selections as faster, much more memory-efficient, have much more performance, and also assistance vectorized opeartions. The variety component in the basic collection has a much more minimal collection of performance.

Conclusion

In final thought, coming across a NameError: name 'variety' not defined mistake can be discouraging, however it is an usual problem that can be quickly repaired. By making sure that the array component is imported appropriately which the appropriate phrase structure is made use of when calling its features, you can prevent this mistake and also effectively implement your code.

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