fixed the error

app.py

@@ -13,13 +13,13 @@ import pandas as pd
 
 def main():
     st.title('Insights 📶')
+    data = pd.DataFrame()
+    uploaded_file = st.file_uploader("Choose a CSV file", type="csv")
+    if st.button('Load Data'):
+        data_loader = DataLoader()
+        data_loader.load_data(uploaded_file)
     
-    data_loader = DataLoader()
-    load = data_loader.load_data()
-    if load:
-        data = pd.read_csv('data.csv')
-
-    
+    data = pd.read_csv("data.csv")
 
     if os.path.getsize("data.csv") != 0:
         with st.sidebar:

data_loader.py

@@ -6,25 +6,12 @@ class DataLoader:
         pass
 
     @st.cache_data(experimental_allow_widgets=True)
-    def load_data(_):
+    def load_data(_,uploaded_file):
         if True:
             data = pd.DataFrame()
-            data_source = st.selectbox('Select data source', ['Upload a CSV file', 'Input a URL'])
-            if data_source == 'Upload a CSV file':
-                uploaded_file = st.file_uploader("Choose a CSV file", type="csv")
-                if uploaded_file is not None:
+            if uploaded_file is not None:
                     data = pd.read_csv(uploaded_file)
                     data.to_csv('./original_data.csv', index=False)
                     data.to_csv('./data.csv',index=False)
-                    return True
-            elif data_source == 'Input a URL':
-                url = st.text_input('Enter the URL of a CSV file')
-                if url:
-                    try:
-                        data = pd.read_csv(url)
-                        data_loaded = True
-                    except:
-                        st.error('Could not load data from the provided URL. Please make sure the URL is correct and points to a CSV file.')
-                return True
             print("data loader ran once")
-        return data
+        return True