Python Tkinter TypeError：'int'对象不可调用

Question

我正在尝试从 main.py 获取用户输入，然后使用该信息在 runAnalytics 上生成输出。我遇到的问题是，有时，当dividen_yield 不可用时，用户输入会产生None 值（可能是null，我不知道），然后我的整个程序将停止。但是，当有股息收益率时，它可以完美运行。

main.py

import runAnalytics
from tkinter import *
import os
import centerWindow

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

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

loadAnalytics = Button(loadApplication, text = "Load Analytics", command=lambda: runAnalytics.run(input1))

centerWindow.center(loadApplication)


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

loadApplication.mainloop()

runAnalytics.py

from yahoo_finance import Share
from tkinter import *
import os
import centerWindow

def run(input1):
    ticker = Share(input1.get())
    loadAnalytics = Tk()
    loadAnalytics.title("$" + "ticker" +  "Data")
    loadAnalytics.geometry("1080x720")
    centerWindow.center(loadAnalytics)

    ticker.refresh()

    if ticker.get_dividend_yield() is None:
        ticker.get_dividend_yield == 0

    share_price    = Label(loadAnalytics, text = "Share Price: " + ticker.get_price()).pack()
    prev_open      = Label(loadAnalytics, text = "Previous Open: " + ticker.get_open()).pack()
    prev_close     = Label(loadAnalytics, text = "Previous CLose: " + ticker.get_prev_close()).pack()
    dividend_yield = Label(loadAnalytics, text = "Dividend Yield: " + ticker.get_dividend_yield()).pack()
    year_low       = Label(loadAnalytics, text = "52 Week Low: " + ticker.get_year_low()).pack()
    year_high      = Label(loadAnalytics, text = "52 Week High: " + ticker.get_year_high()).pack()
    volume         = Label(loadAnalytics, text = "Volume: " + ticker.get_volume()).pack()

    loadAnalytics.mainloop()

[错误]

Tkinter 回调异常 回溯（最近一次通话最后）： 调用中的文件“C:\Users\MyName\AppData\Local\Programs\Python\Python35-32\lib\tkinter__init__.py”，第 1550 行 返回 self.func(*args) 文件“C:\Users\MyName\Documents\Python Projects\DataAnalytics\main.py”，第 13 行，在 loadAnalytics = Button(loadApplication, text = "Load Analytics", command=lambda: runAnalytics.run(input1)) 运行中的文件“C:\Users\MyName\Documents\Python Projects\DataAnalytics\runAnalytics.py”，第 21 行 股息收益率=标签（负载分析，文本=“股息收益率：”+ticker.get_dividend_yield()).pack() TypeError: 'int' 对象不可调用

Answer 1

我尝试执行您的代码，但得到的错误与您的不同：

Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/tkinter/__init__.py", line 1533, in __call__
    return self.func(*args)
  File "./main.py", line 15, in <lambda>
    loadAnalytics = Button(loadApplication, text = "Load Analytics", command=lambda: runAnalytics.run(input1))
  File "/Users/Sven/temp/stackexchange/python/runAnalytics.py", line 22, in run
    dividend_yield = Label(loadAnalytics, text = "Dividend Yield: " + ticker.get_dividend_yield()).pack()
TypeError: Can't convert 'NoneType' object to str implicitly

所以我无法重现您获得的回溯，但我使用 Python 的 Format Specification Mini-Language 更改了您在 runAnalytics.py 文件中的 Label 声明（双行缩进，用于直接复制和粘贴 sn -p):

    share_price    = Label(loadAnalytics,text='Share Price: {}'.format(ticker.get_price())).pack()
    prev_open      = Label(loadAnalytics,text='Previous Open: {}'.format(ticker.get_open())).pack()
    prev_close     = Label(loadAnalytics,text='Previous CLose: {}'.format(ticker.get_prev_close())).pack()
    dividend_yield = Label(loadAnalytics,text='Dividend Yield: {}'.format(ticker.get_dividend_yield())).pack()
    year_low       = Label(loadAnalytics,text='52 Week Low: {}'.format(ticker.get_year_low())).pack()
    year_high      = Label(loadAnalytics,text='52 Week High: {}'.format(ticker.get_year_high())).pack()
    volume         = Label(loadAnalytics,text='Volume: {}'.format(ticker.get_volume())).pack()

这使得代码可以在我的系统上运行而不会出现任何错误，因为 .format() 语句会在必要时将所有类型转换为所需的字符串输出：

请注意，标签文本中有一个小错字，我没有修复（CLose 应该是 Close）