How to debugging

### Describe the bug

I wanted to use my own script to handle the processing, and followed the tutorial documentation by rewriting the MyDatasetConfig and MyDatasetBuilder (which contains the _info,_split_generators and _generate_examples methods) classes. Testing with simple data was able to output the results of the processing, but when I wished to do more complex processing, I found that I was unable to debug (even the simple samples were inaccessible). There are no errors reported, and I am able to print the _info,_split_generators and _generate_examples messages, but I am unable to access the breakpoints.

### Steps to reproduce the bug

# my_dataset.py
import json
import datasets

class MyDatasetConfig(datasets.BuilderConfig):
def __init__(self, **kwargs):
super(MyDatasetConfig, self).__init__(**kwargs)

class MyDataset(datasets.GeneratorBasedBuilder):
VERSION = datasets.Version("1.0.0")

BUILDER_CONFIGS = [
MyDatasetConfig(
name="default",
version=VERSION,
description="myDATASET"
),
]

def _info(self):
print("info") # breakpoints
return datasets.DatasetInfo(
description="myDATASET",
features=datasets.Features(
{
"id": datasets.Value("int32"),
"text": datasets.Value("string"),
"label": datasets.ClassLabel(names=["negative", "positive"]),
}
),
supervised_keys=("text", "label"),
)

def _split_generators(self, dl_manager):

print("generate") # breakpoints
data_file = "data.json"

return [
datasets.SplitGenerator(
name=datasets.Split.TRAIN, gen_kwargs={"filepath": data_file}
),
]

def _generate_examples(self, filepath):
print("example") # breakpoints
with open(filepath, encoding="utf-8") as f:
data = json.load(f)
for idx, sample in enumerate(data):
yield idx, {
"id": sample["id"],
"text": sample["text"],
"label": sample["label"],
}

#main.py
import os
os.environ["TRANSFORMERS_NO_MULTIPROCESSING"] = "1"

from datasets import load_dataset

dataset = load_dataset("my_dataset.py", split="train", cache_dir=None)

print(dataset[:5])

### Expected behavior

Pause at breakpoints while running debugging

### Environment info

pycharm