Question

所以我正在编写一些在程序中使用的模块但是我在使用我在模块ex中定义的变量时遇到了困难：

a.py

body {
    display: grid;
    grid-template-columns: repeat(8,1fr);
    grid-template-rows: auto;
    grid-gap: 10px;
}

#box-0 {
    grid-row: 1;
    grid-column: 1/10;
    background-color: blue;
}

.box-1 {
    grid-row: 2/span 2;
    grid-column: 1/2;
    background-color: blue;
}

.box-2 {
    grid-row: 4/span 2;
    grid-column: 1/2;
    background-color: blue;
}

.box-3 {
    grid-row: 2/span 1;
    grid-column: 2/10;
    background-color: blue;
}

.box-4 {
    grid-row: 3/span 3;
    grid-column: 2/8;
    background-color: blue;
}

.box-5 {
    grid-row: 3/span 3;
    grid-column: 8/10;
    background-color: blue;
}

.box-6 {
    grid-row: 6/span 2;
    grid-column: 1/4;
    background-color: blue;
}

.box-7 {
    grid-row: 6/span 2;
    grid-column: 4/7;
    background-color: blue;
}

.box-8 {
    grid-row: 6/span 2;
    grid-column: 7/10;
    background-color: blue;
}

b.py

def func():
   #do something to set the variable var
   var = randomValue

我将var设置为global，但仍未定义var。

所有这些答案看起来都很棒，但主题都不适用于我的剧本。所以这是模块，也许你可以告诉我如何将from a import func func() #how do i get var放到另一个脚本中：

time_converted

Answer 1

您在函数中定义变量。要使变量的值在函数外部可用，您需要使用return语句。举个例子：

a.py

def func():
    # do something to set the variable `var`
    var = 10

    return var

b.py

from a import func

# to get var
var = func()
print('The value of var is:', var)

有关函数和return语句的更多说明，请参阅here。

Answer 2

<强> a.py

from random import random

def func():
    var = random()
    return var

x = func()

<强> b.py

from a import func,x

print (func(), x)

执行b.py的输出：

0.2927063452485641 0.8207727588707955

编辑，以回应修改后的问题

当reply_handler本身收到回调处理时间时，它会使用另一个回调将其结果报告给主代码。

使用回调函数..

<强> 1.py

from main import receiver

def GetTime():
    reply_handler('this is the time')

def reply_handler(msg):
    receiver(msg)

GetTime()

<强> main.py

def receiver(message):
    print (message)

输出：

this is the time

Answer 3

所以我应该这样做：

GetPrice.py

 from ib.opt import Connection, message
 import datetime

    list_time = []
    def reply_handler(msg):
        if msg.typeName == "currentTime":
            time = msg.time
            list_time.append(time)
            global time_converted
            time_converted = (datetime.datetime.fromtimestamp(int("%s"% time
                                                                  )).strftime('%Y-%m-%d %H:%M:%S'))


    def GetTime():
        conn = Connection.create(port=7496, clientId=100)
        conn.registerAll(reply_handler)
        conn.connect()
        conn.reqCurrentTime()
        while True:
            if len(list_time) == 0:
                pass
            elif len(list_time) == 1:
                break
                conn.disconnect()

        return time_converted

Main.py

from GetRealtime import GetTime

x =  str(GetTime())
print (x)

感谢帮助人员

如何访问在模块中定义的变量？

3 个答案: