如何將值從一個python腳本返回到另一個？

Question

file1.py

from processing file import sendfunction


class ban(): 
    def returnhello(): 
        x = "hello"
        return x #gives reply a value of "hello replied" in processingfile

print(sendfunction.reply()) #this should fetch the value of reply from processingfile,right?

processingfile.py

from file1 import ban
class sendfunction():
    def reply():
        reply = (ban.returnhello() + " replied")
        return reply

我似乎無法得到任何結果，任何幫助將不勝感激。

Answer 1

您需要在調用其member function之前創建類ban object ，如下所示

from file1 import ban
class sendfunction():
    def reply(self):   # Member methods must have `self` as first argument
        b = ban()      # <------- here creation of object
        reply = (b.returnhello() + " replied")
        return reply

或者，您將returnhello方法作為static方法。 然后，您不需要事先創建類的object來使用。

class ban(): 
    @staticmethod       # <---- this is how you make static method
    def returnhello():  # Static methods don't require `self` as first arugment
        x = "hello"
        return x #gives reply a value of "hello replied" in processingfile

BTW:良好的編程習慣是，你總是用Capital字母開始你的課程名稱。
函數和變量名稱應該是帶有下划線的小寫，因此returnhello()應該是return_hello() 。 如前所述這里 。

Answer 2

假設我們有兩個文件A.py和B.py

A.py

a = 3
print('saying hi in A')

B.py

from A import a
print('The value of a is %s in B' % str(a))

在執行B.py時，您將獲得以下輸出：

└> python B.py
saying hi in A
The value of a is 3 in B