Python AttributeError：'str'對象沒有屬性'get_price'

Question

我試圖從main.py獲取用戶輸入，然後將輸出定製到所述用戶輸入。我不僅得到這個錯誤，而且似乎我的runAnalytics正在運行，當我啓動main.py時，而不是當我點擊按鈕命令時這樣做。

main.py

import runAnalytics 
import tkinter 
import os 
import centerWindow 

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(input1)) 

centerWindow.center(loadApplication) 

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

loadApplication.mainloop() 

runAnalytics.py

from yahoo_finance import Share 
import tkinter 
import os 
import centerWindow 

def run(input1): 
    ticker = Share(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() 

錯誤消息：

Traceback (most recent call last): File "C:\Users\MyName\Documents\Python Projects\MarketData\main.py", line 13, in loadAnalytics = tkinter.Button(loadApplication, text = "Load Analytics", command = runAnalytics.run(input1)) File "C:\Users\MyName\Documents\Python Projects\MarketData\runAnalytics.py", line 12, in run print ("Price per share: " + ticker.get_price()) AttributeError: 'str' object has no attribute 'get_price'

Answer 1

因爲結合時，它執行的功能您的假設runAnalytics運行是正確的按照你做的方式按鈕。

根據您需要使用順序lambda功能的功能綁定中傳遞給這樣的按鈕effbot docs：

import tkinter 

def test_func(val): 
    print(type(val)) 
    print(val) 
    share_id = val.get() 
    print(share_id) 


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=lambda: test_func(input1)) 


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

loadApplication.mainloop() 

但是，要記住第二件事：

input1 = tkinter.Entry(loadApplication) 

創建Entry插件稱爲input1，然後將其傳遞給函數。事情是，input1不包含您輸入到條目窗口小部件中的字符串，而是包含對窗口小部件（窗口小部件ID）的引用。爲了獲得小部件的內容，您需要調用它的.get()方法，如我的代碼片段所示。