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Editor to share with you how to use python to achieve fixed Times weather, I believe that most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

one。 Analyze the crawling target

Instead of crawling the stock information here, I'll climb a weather forecast message and send it at a fixed time every day. Open the link below to jump to the China Meteorological Network.

Http://www.weather.com.cnnn/

Click on the temperature location to enter the following figure

We can see 7 days of weather and 8-15 days of weather, and then it won't be necessary for us. Let's check the weather forecast for 7 days, climb the weather for 11 days directly, right mouse button-> check-> Network- > refresh the web page-> view the first one on the list, and then click preview.

You can see the data in HTML, and then go back to element

It can be found that the temperature data are placed below. The location of "cloudy" is sunny

.

Import requestsheaders = {'user-agent':' Mozilla/5.0 (Windows NT 6.1; Win64) X64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.87 Safari/537.36'} # encapsulates headers# here corresponds to the city of my choice. You can change your city url = 'http://www.weather.com.cn/weather/101010100.shtml'# to assign the URL link to the variable url res = requests.get (url, headers=headers) # send the requests request and assign the content of the response to the variable res. Print (res.text) # print out the web page source code of the res object print (res.status_code) # check whether the response status is normal

Looking at the results, you can see that the response is normal, but there is garbled. But don't panic. Just add the word res.encoding='utf-8'.

Then you can write the complete code to crawl the information.

Import requestsfrom bs4 import BeautifulSoupheaders= {'user-agent':'Mozilla/5.0 (Windows NT 6.1; Win64) X64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.87 Safari/537.36'} # encapsulates headersurl=' http://www.weather.com.cn/weather/101010100.shtml'# to assign the URL link to the variable url res=requests.get (url,headers=headers) # sends the requests request And assign the content of the response to the variable res res.encoding='utf-8'bsdata=BeautifulSoup (res.text,'html.parser') # use the bs module to parse the acquired data data_temperature= bsdata.find (class_='tem') # use find () to extract the temperature data of the weather data_weather= bsdata.find (class_='wea') # use find () to take out the text description of the weather print (data_temperature.text) # extract the string content in the variable data_temperature And print print (data_weather.text) # take out the string contents in the variable data_weather, and print

You can successfully get the data you need.

In fact, the most difficult thing is not the crawler, the novice should be able to climb this kind of information, and the next is the most important thing.

two。 Transmission of information

If we want to send mail, take qq mail as an example, we need to go through the following steps:

Connect to the mail server

Log in using your email account password

Fill in the recipient, subject, text, etc.

Send an email

So to connect to the server, you need to use the smtplib library, fill in the topic and write the text, you need to use the email library (python is really yyds)

1. Connect to the server

SMTP stands for simple Mail transfer Protocol, which is equivalent to a convention for sending mail between computers.

Smtplib does not need to be installed. Smtplib is a built-in library of python. Interested partners can take a look at the official documentation.

Look at the following code

Import smtplibmailhost='smtp.qq.com'# assigns QQ Mail's server address to the variable mailhost, which needs to be in the format of a string. Qqmail = smtplib.SMTP () # instantiate an object of the SMTP class in a smtplib module, so that you can SMTP the methods and properties of the object qqmail.connect (mailhost,25) # to connect to the server, the first parameter is the server address, and the second parameter is the SMTP port number

* * mailhost='smtp.qq.com'** is the server address of QQ Mail. This can be found.

To connect to the server using the connect () method of the SMTP object, the first parameter is the obtained server address, and the second parameter is the SMTP port number-- 25. The choice of port number is not unique, but 25 is the simplest and most basic port number, so let's fill in 25.

two。 Get account number and password

This password is not that password, this password needs us to go here to get: https://mail.qq.com/, log in to your email. Then click the "Settings" button at the top and select "account Settings".

Drop down to this position

Click to open the first one, and then get the authorization code. If you have obtained it before but have forgotten it, you need to send a text message to get it again. This code must not be leaked!

Import smtplibmailhost='smtp.qq.com'# assigns QQ Mail's server address to the variable mailhost qqmail = smtplib.SMTP () # instantiates an object of class SMTP in a smtplib module, so that you can SMTP the methods and properties of the object qqmail.connect (mailhost,25) # to connect to the server, the first parameter is the server address, and the second parameter is the SMTP port number. Sender = input ('Please enter your mailbox:') # get the mailbox account number password = input ('Please enter your password:') # get the mailbox password qqmail.login (sender,password) # Login mailbox, the first parameter is the mailbox account number, the second parameter is the mailbox password receiver=input ('Please enter the recipient's email address:') # get the recipient's mailbox

The password you filled in is the authorization code you just obtained

3. Fill in the subject and write the text

You need to use the email library here.

From email.mime.text import MIMETextfrom email.header import Headercontent=input ('Please enter email body:) # enter your email body message = MIMEText (content,' plain', 'utf-8') # instantiate a MIMEText mail object, which needs to be written in three parameters, which are the email body Text format and encoding subject = input ('Please enter your email subject:') # use input () to get the email subject message ['Subject'] = Header (subject,' utf-8')

We also need to introduce the MIMEText module and Header module from the email library.

The last line of code: to the right of the equal sign, an Header header object is instantiated, which needs to write two parameters, namely the message subject and the code, and then assign a value to the variable message ['Subject'] to the left of the equal sign. Message [' Subject'] represents that the property is taken according to the property name of the Subject in the MIMEText class.

If the code has comments and you don't understand, you can go to the documentation.

4. Send mail and exit mailbox

Integrate the previous code into the following

From email.mime.text import MIMETextfrom email.header import Header# introduces Header and MIMEText module content=input ('Please enter email body:') # enter your email body message = MIMEText (content, 'plain',' utf-8') # instantiate a MIMEText mail object, which needs to be written into three parameters, which are the email body Text format and encoding subject = input ('Please enter your email subject:') # use input () to get the email subject message ['Subject'] = Header (subject,' utf-8') qqmail.sendmail (sender, receiver, message.as_string () qqmail.quit () # exit the mailbox

Sendmail () sends mail with three parameters in parentheses, the first is the sender's email address, the second is the recipient's email address, and the third is the body, but it must be in a string format, so it is converted with the as_string () function.

But we hope to show "email sent successfully" when it is sent successfully, and prompt us to "email failed" when it fails, which can be achieved by using the try statement.

Try: qqmail.sendmail (sender, receiver, message.as_string ()) print ('email sent successfully') except: print ('email failed') qqmail.quit () III. Timed transmission

On time, in fact, Python has two built-in standard libraries-time and datetime, but we do not need, ah, is to play, we can use the third-party library schedule actually for a reason: for the timing function we need, time and datetime can of course be achieved, but the operation logic will be relatively complex; while schedule can directly solve the timing function, the code is relatively simple, which is the reason why we choose schedule.

Official documentation link: https://pypi.org/project/schedule/

According to the document, we make a program that runs every 3 seconds.

Import scheduleimport time# introduces schedule and time module def job (): print ("Working in progress...") # to define a function called job. The function of the function is to print 'Isimm working...'schedule.every (3) .seconds.do (job) while True: schedule.run_pending () time.sleep (1).

It can also be set to be sent at a certain time, which is used a lot, so it will not be expanded here. Finally, merge and integrate all these codes, and let's see the effect.

four。 Effect.

I booked here at 03:46 in the afternoon, and then sent it successfully. I opened my mailbox and did receive it.

I've been using this feature on the server for a long time, climbing some messages that I usually have to read, and then sending them, reducing my chances of being attracted by other things.

The above is all the contents of the article "how to use python to achieve fixed Times Weather". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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