bugs fixed

app.py

@@ -7,7 +7,7 @@ from data_visualizer import DataVisualizer
 from data_QA import DataQA
 
 def main():
-    st.title('Dataset Explorer')
+    st.title('Insights 📶')
 
     data_loader = DataLoader()
     data,uploaded_file = data_loader.load_data()

data_transformer.py

@@ -9,6 +9,6 @@ class DataTransformer:
         column_operation = st.sidebar.text_input('Column operation (e.g., age * 2)')
         if column_operation:
             column, operation = column_operation.split()
-            self.data[column] = self.data[column].apply(lambda x: eval(operation))
+            self.data[column] = self.data[column].apply(lambda x: eval(str(x) + operation))
             st.write(self.data)
         return self.data

requirements.txt

@@ -5,4 +5,5 @@ matplotlib
 seaborn
 langchain-google-genai
 langchain-experimental
-python-dotenv
+python-dotenv
+tabulate