例如,我们可以将日期对象转换为字符串,并指定输出格式为年-月-日: date_string=date_object.strftime("%Y-%m-%d") 1. tostring函数的用法 除了使用strftime()函数将日期对象转换为字符串外,Python还提供了一个tostring()函数来直接将日期对象转换为字符串。 tostring()函数是datetime
TypeError: object doesn't support slice assignment String Formatting: The Short Version 将值格式化为字符串是一项非常重要的操作,而且必须满足各种不同的需求,因此多年来已经在该语言中添加了几种方法。过去,主要的解决方案是使用(名称恰当的)字符串格式化操作符百分号。这个操作符的行为模仿了C语言中的经典printf...
Let’s look at a couple of common sequence operations on strings. 让我先定义一个字符串。 Let me first define a string. 让我们来看看“Python” Let’s just go with "Python." 同样,如果我想知道我的字符串有多长,我可以使用len函数。 Again, if I wanted to find out how long is my string,...
(reminder_date, '%Y-%m-%d') if now.date() == reminder_date.date(): message = MIMEText(body, 'plain') message['From'] = sender_email message['To'] = recipient_email message['Subject'] = subject server.sendmail(sender_email, recipient_email, message.as_string()) server.quit() ``...
= 13'# string concatenation using `str.join`>>> " ".join((f"{13}", f"{45}"))'13 45'>>> "#".join((f"{13}", f"{45}"))'13#45'格式化日期 >>> import datetime>>> now = datetime.datetime.now()>>> ten_days_ago = now - datetime.timedelta(days=10)>>> f'{ten_days_...
Python can be used on a server to create web applications. Start learning Python now » Learning by Examples With our "Try it Yourself" editor, you can edit Python code and view the result. ExampleGet your own Python Server print("Hello, World!") ...
name='InX'hello='hello,{}welcome to python world!!!'.format#定义一个问候函数hello(name)#输入结果:hello,inx welcome to python world!!! 3.格式化datetime fromdatetimeimportdatetimenow=datetime.now()print('{:%Y-%m-%d%X}'.format(now))# 输出结果:2024-06-09 13:35:54 ...
字符串类型(String) Python 字符串不能修改,是 immutable 的。因此,为字符串中某个索引位置赋值会报错,如果要生成不同的字符串,应新建一个字符串. 字符串有多种表现形式,用单引号('……')或双引号("……")标注的结果相同 ,通过反斜杠 \ 进行转义,通过索引访问单个字符; 可以实现跨行连续输入。实现方式是用...
login('youremail@gmail.com', 'password') message = MIMEText(body) message['Subject'] = 'Log Alert' message['From'] = 'youremail@gmail.com' message['To'] = 'admin@example.com' server.sendmail('youremail@gmail.com', ['admin@example.com'], message.as_string()) ...
datetime.strptime(reminder_date, '%Y-%m-%d')if now.date() == reminder_date.date():message = MIMEText(body, 'plain')message['From'] = sender_emailmessage['To'] = recipient_emailmessage['Subject'] = subjectserver.sendmail(s...