Add pedestrian streets dataset

app/forms.py

@@ -4,6 +4,7 @@ from wtforms import SelectField, SubmitField
 from wtforms.validators import DataRequired
 
 
+# NOTE The choices should be shorter
 class DatasetForm(FlaskForm):
     dataset = SelectField(validators=[DataRequired()], choices=DATASETS)
     submit = SubmitField("Submit")

app/preprocessing.py

@@ -3,6 +3,7 @@ from json import load
 from pandas import DataFrame, json_normalize
 
 from constants import COLUMNS, FILES
+from app.data_request import request_dataset
 
 
 def open_json(dataset) -> dict:
@@ -18,6 +19,7 @@ def create_dataframe(dataset) -> DataFrame:
     """
     Creates a DataFrame from a JSON file
     """
+    request_dataset(dataset)
     json = open_json(dataset)
     df = json_normalize(data=json, record_path=["records"], errors="ignore",)
     filtered_df = df.filter(items=COLUMNS[dataset])