"age":obj.age}raiseTypeError("Object of type 'Person' is not JSON serializable")# 创建一个Person实例person_instance=Person(name="Emma",age=28)# 序列化为JSON字符串json_string_custom=json.dumps(person_instance,default=person_encoder,indent=2)print(json_string_custom)...
msg['From']=self.from_addr msg['To']=self.to_addrwithsmtplib.SMTP(self.mailhost)asserver:server.sendmail(self.from_addr,[self.to_addr],msg.as_string())# 配置邮件处理程序 mail_handler=EmailHandler(mailhost='smtp.example.com',from_addr='sender@example.com',to_addr='recipient@example.com...
-- Create an input table with some example values.DROPTABLEIFEXISTSvalues_table;CREATETABLEvalues_table (aSTRING, bINT);INSERTINTOvalues_tableVALUES('abc',2), ('abc',4), ('def',6), ('def',8)"; SELECT * FROM values_table;
("INSERT INTO user VALUES {}", without_area_params);let mut stmt_with_area = tx.prepare_cached(st1.as_str()).unwrap();let mut stmt = tx.prepare_cached(st2.as_str()).unwrap();for _ in 0..(count / min_batch_size) {let with_area = common::get_random_bool();let age = ...
To insert new keys/values into a Dictionary, use the square brackets and the assignment operator. With that, the update() method can also be used. Remember, if the key is already in the dictionary, its value will get updated, else the new pair gets inserted. Consider a Dictionary as a...
Iterable that iterates the values to be inserted """ # gets a DBAPI connection that can provide a cursor dbapi_conn = conn.connection with dbapi_conn.cursor() as cur: s_buf = StringIO() writer = csv.writer(s_buf) writer.writerows(data_iter) s_buf.seek(0) columns = ', '.join...
SQL_INSERT_ONE_DATA = "INSERT INTO PEOPLE(id,name,age) VALUES(3,'xag',23);" def insert_one(self): """新增一条数据""" try: self.conn.execute(SQL_INSERT_ONE_DATA) # 必须要提交,才能正确执行 self.conn.commit() except Exception as e: self.conn.rollback() print('插入一条记录失败,...
{SQL Server};SERVER='+server+';DATABASE='+database+';UID='+username+';PWD='+ password) cursor = cnxn.cursor() # Insert Dataframe into SQL Server: for index, row in df.iterrows(): cursor.execute("INSERT INTO HumanResources.DepartmentTest (DepartmentID,Name,GroupName) values(?,?,?)...
To format values in an f-string, add placeholders{}, a placeholder can contain variables, operations, functions, and modifiers to format the value. Example Add a placeholder for thepricevariable: price =59 txt = f"The price is {price} dollars" ...
0,0)写一个自动化的小脚本deff():sht_3.range("A1:AZ48").column_width=1.1sht_3.range(...