Initial commit: db_connection.py

- Add db_connection class with methods to create tables and check if they
exist.

db_connection.py

@@ -0,0 +1,35 @@
+import sqlite3
+
+class db_connection(object):
+    
+    def __init__(self, path):
+        self.conn = sqlite3.connect(path)
+    
+    def __del__(self):
+        self.conn.close()
+    
+    def create_table(self, name, row_list):
+        if self.table_exists(name):
+            return True
+        
+        else:
+            row_string = ""
+            separator = ", "
+            for i in range(0, len(row_list)):
+                if i == len(row_list) - 1:
+                    separator = ""
+                row_string += "%s%s" % (row_list[i], separator)
+            
+            self.conn.execute("CREATE TABLE %s(%s)" % (name, row_string))
+            if self.table_exists(name):
+                return True
+            else:
+                return False
+    
+    def table_exists(self, name):
+        result = self.conn.execute("""SELECT * FROM sqlite_master
+                    WHERE type='table' AND name=?""", (name,))
+        if result.fetchone() == None:
+            return False
+        else:
+            return True