Update redisql/README.md

redisql/README.md

@@ -1,11 +1,11 @@
 ```python
-#
 import sqlite3
 import time
 
 class SQLiteRedis:
-    def __init__(self, db_name=':memory:'):
+    def __init__(self, db_name='redis.sqlite'):
-        self.conn = sqlite3.connect(db_name)
+        self.conn = sqlite3.connect(db_name, isolation_level=None)
+        self.conn.execute('PRAGMA journal_mode=WAL')
         self.cur = self.conn.cursor()
         self._create_tables()
 
@@ -14,21 +14,17 @@ class SQLiteRedis:
                             (key TEXT PRIMARY KEY, value TEXT)''')
         self.cur.execute('''CREATE TABLE IF NOT EXISTS expiry
                             (key TEXT PRIMARY KEY, expire_at INTEGER)''')
-        self.conn.commit()
         self.cur.execute('''CREATE TABLE IF NOT EXISTS list_store
                             (key TEXT, idx INTEGER, value TEXT,
                              PRIMARY KEY (key, idx))''')
-        self.conn.commit()
         self.cur.execute('''CREATE TABLE IF NOT EXISTS hash_store
                             (key TEXT, field TEXT, value TEXT,
                              PRIMARY KEY (key, field))''')
-        self.conn.commit()
 
 
     def set(self, key, value):
         self.cur.execute("REPLACE INTO kv_store (key, value) VALUES (?, ?)",
                          (key, value))
-        self.conn.commit()
 
     def get(self, key):
         self.cur.execute("SELECT value FROM kv_store WHERE key = ?", (key,))
@@ -40,13 +36,11 @@ class SQLiteRedis:
     def delete(self, key):
         self.cur.execute("DELETE FROM kv_store WHERE key = ?", (key,))
         self.cur.execute("DELETE FROM expiry WHERE key = ?", (key,))
-        self.conn.commit()
 
     def expire(self, key, seconds):
         expire_at = int(time.time()) + seconds
         self.cur.execute("REPLACE INTO expiry (key, expire_at) VALUES (?, ?)",
                          (key, expire_at))
-        self.conn.commit()
 
     def ttl(self, key):
         self.cur.execute("SELECT expire_at FROM expiry WHERE key = ?", (key,))
@@ -61,7 +55,6 @@ class SQLiteRedis:
         self.cur.execute("DELETE FROM kv_store WHERE key IN "
                          "(SELECT key FROM expiry WHERE expire_at <= ?)", (now,))
         self.cur.execute("DELETE FROM expiry WHERE expire_at <= ?", (now,))
-        self.conn.commit()
 
     def close(self):
         self.conn.close()
@@ -71,7 +64,6 @@ class SQLiteRedis:
             self.cur.execute("INSERT INTO list_store (key, idx, value) "
                              "SELECT ?, COALESCE(MIN(idx), 0) - 1, ? "
                              "FROM list_store WHERE key = ?", (key, value, key))
-        self.conn.commit()
         return self.llen(key)
 
     def rpush(self, key, *values):
@@ -79,7 +71,6 @@ class SQLiteRedis:
             self.cur.execute("INSERT INTO list_store (key, idx, value) "
                              "SELECT ?, COALESCE(MAX(idx), -1) + 1, ? "
                              "FROM list_store WHERE key = ?", (key, value, key))
-        self.conn.commit()
         return self.llen(key)
 
     def lpop(self, key):
@@ -90,7 +81,6 @@ class SQLiteRedis:
             self.cur.execute("DELETE FROM list_store WHERE key = ? "
                              "AND idx = (SELECT MIN(idx) FROM list_store WHERE key = ?)",
                              (key, key))
-            self.conn.commit()
             return result[0]
         return None
 
@@ -107,7 +97,6 @@ class SQLiteRedis:
     def hset(self, key, field, value):
         self.cur.execute("REPLACE INTO hash_store (key, field, value) VALUES (?, ?, ?)",
                          (key, field, value))
-        self.conn.commit()
         return 1
 
     def hget(self, key, field):
@@ -122,7 +111,6 @@ class SQLiteRedis:
             self.cur.execute("DELETE FROM hash_store WHERE key = ? AND field = ?",
                              (key, field))
             deleted += self.cur.rowcount
-        self.conn.commit()
         return deleted
 
     def hlen(self, key):
@@ -152,6 +140,4 @@ r.hset("myhash", "name", "John")
 r.hset("myhash", "age", "30")
 print(r.hget("myhash", "name"))  # 'John'
 print(r.hgetall("myhash"))  # {'name': 'John', 'age': '30'}
-#
-
 ```