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使用python框架实现多线程

python python-3.x multithreading

使用python框架实现多线程,python,python-3.x,multithreading,python-multithreading,Python,Python 3.x,Multithreading,Python Multithreading,python和线程是新手，所以我不确定线程是否正在发生，如下所述-- 在这里，我尝试为每个事件部署一个单独的线程。当用户每次按下“提交按钮”时，应该创建一个新线程，然后执行它 a.py文件： from bottle import request, template,route,run,get,post import sqlite3 import threading import datetime @route('/') def index(): return template('ins

python和线程是新手，所以我不确定线程是否正在发生，如下所述--

在这里，我尝试为每个事件部署一个单独的线程。当用户每次按下“提交按钮”时，应该创建一个新线程，然后执行它

a.py文件：

from bottle import request, template,route,run,get,post
import sqlite3
import threading
import datetime

@route('/')
def index():
    return template('ins')

@post('/result')
def result():
    # print(request.body.read())  gives raw data
    result = request.forms
    usr_time = request.forms['usr_time']      #get all the values using keys
    A = request.forms.get('A')
    B = request.forms.get('B')
    C = request.forms.get('C')
    usr_hour,usr_mins = usr_time.split(":")


    with sqlite3.connect("database.db") as conn:
        cur = conn.cursor()

        cur.execute("CREATE TABLE IF NOT EXISTS bottable(hour TEXT, minutes TEXT, A TEXT, B TEXT, C TEXT)")
        cur.execute("INSERT INTO bottable(hour,minutes,A,B,C) VALUES (?,?,?,?,?)", (usr_hour,usr_mins,A,B,C))
        cur.execute("select * from bottable")
        data = cur.fetchall()       #get the whole table

        conn.commit()

    t1=threading.Thread(target=calc, args=(data,))    
    t1.start()  

    return template("result",result = result)

def calc(data):

    print(data)               #prints the whole table
    match_not_found=True
    while match_not_found:
        h=datetime.datetime.today().strftime("%H")              
        mi=datetime.datetime.today().strftime("%M")
        # z=[(i[2],i[3],i[4]) for i in data if i[0] == h and i[1]==mi]
        for i in data: 
            if i[0] == h and i[1]==mi:
                print ([j for j in i[2:5] if j != None])
                match_not_found=False
                break


if __name__ == '__main__':
    run(host='localhost',port=8080,debug='True',reloader='True')

<!DOCTYPE html>
<html>
<body>

<form action="http://localhost:8080/result" method = "POST">
Select a time:
<input type="time" name="usr_time">
<br> <br>
<input type="checkbox" name="A" value="A is on" >A </input>
<br>
<input type="checkbox" name="B" value="B is on" >B </input>
<br>
<input type="checkbox" name="C" value="C is on" >C </input>
<br><br>
<input type="submit"> </input>
</form>


</body>
</html>

<!doctype html>
<html>
   <body>

      <table border = 1>
         %for key, value in result.items():

            <tr>
               <th> {{ key }} </th>
               <td> {{ value }} </td>
            </tr>

         %end
      </table>

   </body>
</html>
ins.tpl:

from bottle import request, template,route,run,get,post
import sqlite3
import threading
import datetime

@route('/')
def index():
    return template('ins')

@post('/result')
def result():
    # print(request.body.read())  gives raw data
    result = request.forms
    usr_time = request.forms['usr_time']      #get all the values using keys
    A = request.forms.get('A')
    B = request.forms.get('B')
    C = request.forms.get('C')
    usr_hour,usr_mins = usr_time.split(":")


    with sqlite3.connect("database.db") as conn:
        cur = conn.cursor()

        cur.execute("CREATE TABLE IF NOT EXISTS bottable(hour TEXT, minutes TEXT, A TEXT, B TEXT, C TEXT)")
        cur.execute("INSERT INTO bottable(hour,minutes,A,B,C) VALUES (?,?,?,?,?)", (usr_hour,usr_mins,A,B,C))
        cur.execute("select * from bottable")
        data = cur.fetchall()       #get the whole table

        conn.commit()

    t1=threading.Thread(target=calc, args=(data,))    
    t1.start()  

    return template("result",result = result)

def calc(data):

    print(data)               #prints the whole table
    match_not_found=True
    while match_not_found:
        h=datetime.datetime.today().strftime("%H")              
        mi=datetime.datetime.today().strftime("%M")
        # z=[(i[2],i[3],i[4]) for i in data if i[0] == h and i[1]==mi]
        for i in data: 
            if i[0] == h and i[1]==mi:
                print ([j for j in i[2:5] if j != None])
                match_not_found=False
                break


if __name__ == '__main__':
    run(host='localhost',port=8080,debug='True',reloader='True')

<!DOCTYPE html>
<html>
<body>

<form action="http://localhost:8080/result" method = "POST">
Select a time:
<input type="time" name="usr_time">
<br> <br>
<input type="checkbox" name="A" value="A is on" >A </input>
<br>
<input type="checkbox" name="B" value="B is on" >B </input>
<br>
<input type="checkbox" name="C" value="C is on" >C </input>
<br><br>
<input type="submit"> </input>
</form>


</body>
</html>

<!doctype html>
<html>
   <body>

      <table border = 1>
         %for key, value in result.items():

            <tr>
               <th> {{ key }} </th>
               <td> {{ value }} </td>
            </tr>

         %end
      </table>

   </body>
</html>


选择一个时间：



A.


B


C
结果。第三方物流：

from bottle import request, template,route,run,get,post
import sqlite3
import threading
import datetime

@route('/')
def index():
    return template('ins')

@post('/result')
def result():
    # print(request.body.read())  gives raw data
    result = request.forms
    usr_time = request.forms['usr_time']      #get all the values using keys
    A = request.forms.get('A')
    B = request.forms.get('B')
    C = request.forms.get('C')
    usr_hour,usr_mins = usr_time.split(":")


    with sqlite3.connect("database.db") as conn:
        cur = conn.cursor()

        cur.execute("CREATE TABLE IF NOT EXISTS bottable(hour TEXT, minutes TEXT, A TEXT, B TEXT, C TEXT)")
        cur.execute("INSERT INTO bottable(hour,minutes,A,B,C) VALUES (?,?,?,?,?)", (usr_hour,usr_mins,A,B,C))
        cur.execute("select * from bottable")
        data = cur.fetchall()       #get the whole table

        conn.commit()

    t1=threading.Thread(target=calc, args=(data,))    
    t1.start()  

    return template("result",result = result)

def calc(data):

    print(data)               #prints the whole table
    match_not_found=True
    while match_not_found:
        h=datetime.datetime.today().strftime("%H")              
        mi=datetime.datetime.today().strftime("%M")
        # z=[(i[2],i[3],i[4]) for i in data if i[0] == h and i[1]==mi]
        for i in data: 
            if i[0] == h and i[1]==mi:
                print ([j for j in i[2:5] if j != None])
                match_not_found=False
                break


if __name__ == '__main__':
    run(host='localhost',port=8080,debug='True',reloader='True')

<!DOCTYPE html>
<html>
<body>

<form action="http://localhost:8080/result" method = "POST">
Select a time:
<input type="time" name="usr_time">
<br> <br>
<input type="checkbox" name="A" value="A is on" >A </input>
<br>
<input type="checkbox" name="B" value="B is on" >B </input>
<br>
<input type="checkbox" name="C" value="C is on" >C </input>
<br><br>
<input type="submit"> </input>
</form>


</body>
</html>

<!doctype html>
<html>
   <body>

      <table border = 1>
         %for key, value in result.items():

            <tr>
               <th> {{ key }} </th>
               <td> {{ value }} </td>
            </tr>

         %end
      </table>

   </body>
</html>


%对于键，result.items（）中的值：
{{key}}
{{value}}
%结束
ins.tpl和result.tpl都存储在views文件夹中（“因为我使用的是瓶子”）。我不确定是否每次都生成一个新线程。还是有更好的方法

代码看起来确实在每次提交时启动了一个新线程。这很容易使用验证

calc（）中似乎存在争用条件，多个线程通过print（）函数竞争访问标准输出。您可以通过将所有输出行合并为一个字符串并一次性打印（或者更好，创建一个打印队列并在单独的线程中进行打印）来解决此问题。

代码看起来确实会在每次提交时启动一个新线程。这很容易使用验证

calc（）中似乎存在争用条件，多个线程通过print（）函数竞争访问标准输出。您可以通过将所有输出行合并为一个字符串并一次性打印（或者更好，创建一个打印队列并在单独的线程中进行打印）来解决此问题。

此外，还有线程、多处理、队列，还有池。我有点不知道该用什么/在哪里。在我进入线程/处理之前，我可以了解一些信息吗？@captainalooreptin'这里有一个关于并发方法的视频链接，这里有幻灯片，还有线程、多处理、队列，还有池。我有点不知道该用什么/在哪里。在我进入线程/处理之前，我可以了解一些信息吗？@captainalooreptin'这里是一个关于并发方法的视频链接，下面是幻灯片，