擅长:python、mysql、java
<p>下面是一个很好的例子:</p>
<p>尝试:</p>
<pre><code>from tkinter import *
class App:
def __init__(self, root):
self.pointenter = Entry(root,font=(None, 14), width=50)
self.pointenter.pack()
addbutton = Button(root, bg="green", fg="white", text=" + ", command=self.addpoints)
addbutton.config(font='bold')
addbutton.pack()
def addpoints(self):
self.currpts = '50' # a string
print(float(self.currpts)+ float(self.pointenter.get()))
if __name__=='__main__':
root = Tk()
app = App(root)
root.mainloop()
</code></pre>
<p>刚开始的时候我发现一件非常有用的事情就是对所有变量执行print()。希望这有帮助</p>