from azureml.core import Workspace, Datastore, Dataset
import pandas as pd

pandas_df = pd.read_csv('<path to your csv file>')
ws = Workspace.from_config()
datastore = Datastore.get(ws, '<name of your datastore>')
dataset = Dataset.Tabular.register_pandas_dataframe(pandas_df, datastore, "dataset_from_pandas_df", show_progress=True)