input: Write a function to convert a given SQL query into its equivalent Python code using SQLite. The input will be a simple SQL SELECT query and the function should return the equivalent Python code as a string. If the query is not a SELECT query, return an empty string. Also, assume that the database file is named 'movies.db'.
  
  assert convert_sql_to_python("SELECT * FROM Movies WHERE category = 'horror'") == """import sqlite3
  
  conn = sqlite3.connect('movies.db') 
  cursor = conn.cursor()
  
  cursor.execute("SELECT * FROM Movies WHERE category = 'horror'")
  
  result = cursor.fetchall()
  for row in result:
      print(row)
  
  conn.close()"""
  
  assert convert_sql_to_python("UPDATE Movies SET title = 'New Title' WHERE id = 1") == ""
  assert convert_sql_to_python("SELECT name, age FROM Users WHERE age > 30") == """import sqlite3
  
  conn = sqlite3.connect('movies.db') 
  cursor = conn.cursor()
  
  cursor.execute("SELECT name, age FROM Users WHERE age > 30")
  
  result = cursor.fetchall()
  for row in result:
      print(row)
  
  conn.close()"""
  
  assert convert_sql_to_python("") == ""
output: def convert_sql_to_python(query):
      if not query.strip().upper().startswith("SELECT"):
          return ""
      
      return f"""import sqlite3
  
  conn = sqlite3.connect('movies.db') 
  cursor = conn.cursor()
  
  cursor.execute("{query}")
  
  result = cursor.fetchall()
  for row in result:
      print(row)
  
  conn.close()"""