Update sql_data.py

sql_data.py

@@ -0,0 +1,76 @@
+from sqlalchemy import create_engine, text
+from smolagents import tool
+import pandas as pd
+
+# Create database engine
+engine = create_engine("sqlite:///freights.db")
+
+@tool
+def sql_query(query: str) -> str:
+    """
+    Allows you to perform SQL queries on the freights table. Returns a string representation of the result.
+    The table is named 'freights'. Its description is as follows:
+        Columns:
+        - departure: DateTime (Date and time of departure)
+        - origin_port_locode: String (Origin port code)
+        - origin_port_name: String (Name of the origin port)
+        - destination_port: String (Destination port code)
+        - destination_port_name: String (Name of the destination port)
+        - dv20rate: Float (Rate for 20ft container in USD)
+        - dv40rate: Float (Rate for 40ft container in USD)
+        - currency: String (Currency of the rates)
+        - inserted_on: DateTime (Date when the rate was inserted)
+    Args:
+        query: The query to perform. This should be correct SQL.
+    Returns:
+        A string representation of the result of the query.
+    """
+    try:
+        with engine.connect() as con:
+            result = con.execute(text(query))
+            rows = [dict(row._mapping) for row in result]
+
+            if not rows:
+                return "Aucun résultat trouvé."
+
+            # Convert to markdown table
+            headers = list(rows[0].keys())
+            table = "| " + " | ".join(headers) + " |\n"
+            table += "| " + " | ".join(["---" for _ in headers]) + " |\n"
+
+            for row in rows:
+                table += "| " + " | ".join(str(row[h]) for h in headers) + " |\n"
+
+            return table
+
+    except Exception as e:
+        return f"Error executing query: {str(e)}"
+
+
+@tool
+def get_schema() -> str:
+    """
+    Returns the schema of the freights table.
+    """
+    return """
+    Table: freights
+    Columns:
+    - departure: DateTime (Date and time of departure)
+    - origin_port_locode: String (Origin port code)
+    - origin_port_name: String (Name of the origin port)
+    - destination_port: String (Destination port code)
+    - destination_port_name: String (Name of the destination port)
+    - dv20rate: Float (Rate for 20ft container in USD)
+    - dv40rate: Float (Rate for 40ft container in USD)
+    - currency: String (Currency of the rates)
+    - inserted_on: DateTime (Date when the rate was inserted)
+    """
+
+
+@tool
+def get_csv_as_dataframe() -> str:
+    """
+    Returns a string representation of the freights table as a CSV file.
+    """
+    df = pd.read_sql_table("freights", engine)
+    return df.to_csv(index=False)