Python Tkinter 输入日期相减

Question

我一直在尝试让我的Tkinter对话框做一个简单的日期减法，但总是遇到问题。日期减法在命令行运行时没问题，但在Tkinter中却没有任何反应。

这段代码是从我另一个成功运行的脚本中借来的，那个脚本的表单和窗口设置都没问题。

#!/usr/bin/python

from Tkinter import *
import datetime
import math

fields = ('Enter Date (mm/dd/yy)', 'Days Since 10/30/14')

def Calc(entries):
   d = raw_input(entries['Enter Date (mm/dd/yy)'].get())
   nd = datetime.datetime.strptime(d, "%m/%d/%y").date()
   d1 = "10/30/14"
   od = datetime.datetime.strptime(d1, "%m/%d/%y").date()
   diff = (nd - od).days
   diff = ('%8.2f' % diff).strip()
   entries['Days Since 10/30/14'].delete(0,END)
   entries['Days Since 10/30/14'].insert(0, diff)

def makeform(root, fields):
   root.title('Date Difference')
   entries = {}
   for field in fields:
      row = Frame(root)
      lab = Label(row, width=22, text=field+": ", anchor='w', font=('arial', 12))
      ent = Entry(row, font=('arial', 12))
      row.pack(side=TOP, fill=X, padx=5, pady=5)
      lab.pack(side=LEFT, padx=10)
      ent.pack(side=RIGHT, expand=YES, fill=X)
      entries[field] = ent
   return entries

if __name__ == '__main__':
   root = Tk()
   root.geometry("400x400+300+300")
   ents = makeform(root, fields)
   root.bind('<Return>', (lambda event, e=ents: Calc(e)))
   b1 = Button(root, text='Calculate', font=('arial',12), command=(lambda e=ents: Calc(e)))
   b1.pack(side=LEFT, padx=5, pady=5)
   b2 = Button(root, text='Quit', font=('arial',12), command=root.quit)
   b2.pack(side=LEFT, padx=5, pady=5)
   root.mainloop()

希望能得到一些帮助……

现在我搞得更糟了，怎么都启动不了，还在makeform(root,fields):这一行把“lab”变量标红了，刚才还可以运行，只是无法进行计算……

有人能帮帮我吗？

Answer 1

d = raw_input(entries['Enter Date (mm/dd/yy)'].get())

d = entries['Enter Date (mm/dd/yy)'].get()

raw_input 是通过命令行从用户那里获取数据的。这是故意这样设计的吗？如果你只是想知道用户在输入框里输入了什么，其实不需要用这个。