added Renata files and developed beauty output

other/Renata/tables/countries_table.py

@@ -0,0 +1,37 @@
+from dbtable import *
+
+class CountriesTable(DbTable):
+    def table_name(self):
+        return self.dbconn.prefix + '"Сountries"'
+
+    def columns(self):
+        return {"country_id": ["serial", "PRIMARY KEY"],
+                "name": ["varchar(64)", "NOT NULL", "UNIQUE"]
+                }
+    def primary_key(self):
+        return ["country_id"]
+    def column_names_without_id(self):
+        res = sorted(self.columns().keys(), key = lambda x: x)
+        res.remove('country_id')
+        return res
+    def find_by_position(self, num):
+        sql = f"SELECT * FROM {self.table_name()} ORDER BY name LIMIT 1 OFFSET " + "%(offset)s"
+        cur = self.dbconn.conn.cursor()
+        cur.execute(sql, {"offset": num - 1})
+        return cur.fetchone()       
+    def allbyname(self):
+        sql = f"SELECT * FROM {self.table_name()} ORDER BY name"
+        cur = self.dbconn.conn.cursor()
+        cur.execute(sql)
+        return cur.fetchall()
+    def findbyname(self, data):
+        sql = f"SELECT country_id FROM {self.table_name()} WHERE name = "+ "%s"
+        cur = self.dbconn.conn.cursor()
+        cur.execute(sql, (data,))
+        return cur.fetchall()
+    def delete_by_cid(self, cid):
+        sql = f"DELETE FROM {self.table_name()} WHERE country_id = " +"%s"
+        cur = self.dbconn.conn.cursor()
+        cur.execute(sql, (cid,))
+        self.dbconn.conn.commit()
+        return