2018.5.8 python操纵sqlite数据库

创建：

create_Email = "CREATE TABLE if not exists emails (
id INTEGER NOT NULL,
user VARCHAR(64),
email VARCHAR(64),
PRIMARY KEY (id)
);"

try:

    sqlite_conn=sqlite3.connect(DB_SQLITE_NAME)

    sqlite_cursor.execute(create_Email)
    sqlite_conn.commit()

except sqlite3.Error,e:
    traceback.print_exc()
    sqlite_conn.rollback()
finally:
    sqlite_conn.close()

面向对象：
class Email(object):
    """docstring for Email"""
    def __init__(self):
        self.emails = []
        lines=self._get()
        if lines != None and lines != 'failed':
            for line in lines:
            email = {}
            email['id'] = line[0]
            email['user'] = line[1]
            email['email'] = line[2]
            self.emails.append(email)

    def _list_all_member(self):
        tmp_str=''
        for name,value in vars(self).items():
            if value != None:
                if type(value) == int:
                    tmp_str=tmp_str+name+'='+str(value)+','
                else:
                    tmp_str=tmp_str+name+'='+"'"+str(value)+"'"+','
        return tmp_str

    def _list_all_member_insert(self,email):
        tmp_str=''
        value_str=' VALUES ('
        for name,value in email.items():
            if value != None:
                tmp_str+=name+','
                if type(value)==int:
                    value_str+=str(value)+','
                else:
                    value_str+="'"+str(value)+"'"+','
                tmp_str=tmp_str.strip(',')+')'
                value_str=value_str.strip(',')+')'
        return tmp_str,value_str

    def _get(self):
        try:
            rows = []
            sqlite_conn=sqlite3.connect(DB_SQLITE_NAME)
            sqlite_cursor=sqlite_conn.cursor()
            sql_select="SELECT * FROM EMAILS;"
            sqlite_cursor.execute(sql_select)
            for row in sqlite_cursor:
                rows.append(row)
            return rows
        except sqlite3.Error,e:
            return 'failed'
        finally:
            sqlite_conn.close()

    def delete(self,id):
        for email in self.emails:
            if email['id'] == id:
                self.emails.remove(email)
                sql_delete= "DELETE FROM EMAILS WHERE id = '" + id + "';"
                local_sql_exe(sql_delete)

    def add(self,email):
        self.emails.append(email)
        sql_insert='INSERT INTO EMAILS ( '
                name_str,value_str=self._list_all_member_insert(email)
        sql_insert+=name_str+value_str
        local_sql_exe(sql_insert)

    def clear(self):
        self.emails = []
        sql_delete= "DELETE FROM EMAILS;"
        local_sql_exe(sql_delete)

调用:

from sqlite import Email

email= Email()

email.emails

email.add(email)

email.delete(id)