在另一个脚本中使用变量以避免NameError

Question

我试图从main.py中获取用户输入（input1）并在runAnalytics.py中使用它。

main.py

import runAnalytics 
import tkinter 
import os 
import centerWindow 

global input1 

loadApplication = tkinter.Tk() 
loadApplication.title("Stock Analytics") 
loadApplication.geometry("1080x720") 

label1 = tkinter.Label(loadApplication, text = "Ticker") 
input1 = tkinter.Entry(loadApplication) 

loadAnalytics = tkinter.Button(loadApplication, text = "Load Analytics", command = runAnalytics.run) 

centerWindow.center(loadApplication) 

loadAnalytics.pack() 
label1.pack() 
input1.pack() 

loadApplication.mainloop() 

runAnalytics：

from yahoo_finance import Share 
import tkinter 
import os 
import centerWindow 

def run(): 
    ticker = input1 

    loadAnalytics = tkinter.Tk() 
    loadAnalytics.title("$" + ticker + " Data") 
    loadAnalytics.geometry("1080x720") 

    print ("Price per share: " + ticker.get_price()) 

    ticker.refresh() 
    print ("Price per share: " + ticker.get_price()) 

    print("The dividend yield is: " + ticker.get_dividend_yield()) 

    print("The 52 week low is: " + ticker.get_year_low()) 
    print("The 52 week high is: " + ticker.get_year_high()) 
    print("The volume is: " + ticker.get_volume()) 

    print("The previous close was: " + ticker.get_prev_close()) 
    print("The previous open was: " + ticker.get_open()) 

    loadAnalytics.mainloop() 

，我看到如下的错误消息;

"Exception in Tkinter callback 
Traceback (most recent call last): 
    File "C:\Users\MyName\AppData\Local\Programs\Python\Python35-32\lib\tkinter\__init__.py", line 1550, in __call__ 
    return self.func(*args) 
    File "C:\Users\MyName\Documents\Python Projects\MarketData\runAnalytics.py", line 8, in run 
    ticker = input1 
NameError: name 'input1' is not defined 

Answer 1

该global关键字没有做你期待的。它应该在函数内部使用，以表示您将引用在函数之外声明的变量。要解决你的问题，你应该输入变量（但它不是一个好的模式，我会说）

from main import input1