Issue: TypeError: 'NoneType' object is not callable
State: closed
Author: Chenfei-Kang

## Describe the bug

TypeError: 'NoneType' object is not callable
## Steps to reproduce the bug
```python
from datasets import load_dataset, load_metric
dataset = datasets.load_dataset("glue", 'cola')
```

## Expected results
A clear and concise description of the expected results.

## Actual results
Specify the actual results or traceback.

## Environment info
<!-- You can run the command `datasets-cli env` and copy-and-paste its output below. -->
- `datasets` version: 1.11.0
- Platform:
- Python version: 3.7
- PyArrow version:


Comments:
Hi, @Chenfei-Kang.

I'm sorry, but I'm not able to reproduce your bug:
```python
from datasets import load_dataset

ds = load_dataset("glue", 'cola')
ds
```
```
DatasetDict({
    train: Dataset({
        features: ['sentence', 'label', 'idx'],
        num_rows: 8551
    })
    validation: Dataset({
        features: ['sentence', 'label', 'idx'],
        num_rows: 1043
    })
    test: Dataset({
        features: ['sentence', 'label', 'idx'],
        num_rows: 1063
    })
})
```

Could you please give more details and environment info (platform, PyArrow version)?

> Hi, @Chenfei-Kang.
> 
> I'm sorry, but I'm not able to reproduce your bug:
> 
> ```python
> from datasets import load_dataset
> 
> ds = load_dataset("glue", 'cola')
> ds
> ```
> 
> ```
> DatasetDict({
>     train: Dataset({
>         features: ['sentence', 'label', 'idx'],
>         num_rows: 8551
>     })
>     validation: Dataset({
>         features: ['sentence', 'label', 'idx'],
>         num_rows: 1043
>     })
>     test: Dataset({
>         features: ['sentence', 'label', 'idx'],
>         num_rows: 1063
>     })
> })
> ```
> 
> Could you please give more details and environment info (platform, PyArrow version)?

Sorry to reply you so late.
platform: pycharm 2021 + anaconda with python 3.7
PyArrow version: 5.0.0
huggingface-hub: 0.0.16
datasets: 1.9.0


- For the platform, we need to know the operating system of your machine. Could you please run the command `datasets-cli env` and copy-and-paste its output below?
- In relation with the error, you just gave us the error type and message (`TypeError: 'NoneType' object is not callable`). Could you please copy-paste the complete stack trace, so that we know exactly which part of the code threw the error?

> * For the platform, we need to know the operating system of your machine. Could you please run the command `datasets-cli env` and copy-and-paste its output below?
> * In relation with the error, you just gave us the error type and message (`TypeError: 'NoneType' object is not callable`). Could you please copy-paste the complete stack trace, so that we know exactly which part of the code threw the error?

1. For the platform, here are the output:
        - datasets` version: 1.11.0
        - Platform: Windows-10-10.0.19041-SP0
        - Python version: 3.7.10
        - PyArrow version: 5.0.0
2. For the code and error：
     ```python
     from datasets import load_dataset, load_metric
     dataset = load_dataset("glue", "cola")
    ```
    ```python
    Traceback (most recent call last):
    ....
    ....
    File "my_file.py", line 2, in <module>
    dataset = load_dataset("glue", "cola")
    File "My environments\lib\site-packages\datasets\load.py", line 830, in load_dataset
    **config_kwargs,
     File "My environments\lib\site-packages\datasets\load.py", line 710, in load_dataset_builder
    **config_kwargs,
    TypeError: 'NoneType' object is not callable
    ```
   Thank you!

For that environment, I am sorry but I can't reproduce the bug: I can load the dataset without any problem.

One naive question: do you have internet access from the machine where you execute the code?

> For that environment, I am sorry but I can't reproduce the bug: I can load the dataset without any problem.

But I can download other task dataset such as `dataset = load_dataset('squad')`. I don't know what went wrong.  Thank you so much!

Hi,friends. I meet the same problem. Do you have a way to fix this? Thanks!


I'm getting the same error. Have you solved the problem? Please tell me how to fix it

same error, fix by Downgrade the datasets version to 2.16.0.

Similar error when trying to download another dataset with 2.16.0, but 2.10.0 works

Same issue in v3.1.0; resolved by downgrading to v2.21.0.

same error, using the lower version 2.16.0 works

I met the same error, how did you save your problem?

> I met the same error, how did you save your problem?

down grade datasets version, try 2.16.0 or 2.10.0

success solve the problem by downgrade to 2.10.0

ERROR: Could not find a version that satisfies the requirement dataset==2.10.0 (from versions: 0.3, 0.3.3, 0.3.5, 0.3.6, 0.3.9, 0.3.10, 0.3.11, 0.3.12, 0.3.13, 0.3.14, 0.3.15, 0.4.0, 0.5.0, 0.5.1, 0.5.2, 0.5.4, 0.5.5, 0.5.6, 0.6.0, 0.6.1, 0.6.2, 0.6.3, 0.6.4, 0.7.0, 0.7.1, 0.8.0, 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5, 1.0.6, 1.0.7, 1.0.8, 1.1.0, 1.1.1, 1.1.2, 1.2.0, 1.2.1, 1.2.2, 1.2.3, 1.3.0, 1.3.1, 1.3.2, 1.4.1, 1.4.2, 1.4.3, 1.4.4, 1.4.5, 1.5.0, 1.5.1, 1.5.2, 1.6.0, 1.6.2)
ERROR: No matching distribution found for dataset==2.10.0