本来想做个口算，但是计时出问题
源代码：
#coding:utf-8
from tkinter import *
import tkinter as t
import random as r
from tkinter.messagebox import *
import pygame as py
from time import time
z=700
q=70
o=65
c01=[]
c00=[]
dd=[]
py.mixer.init()
py.mixer.music.load(r'muisc\nb.wav')
math=0
def random():
global label,s,q,o,l1,u,l2,l3,l4,l5,l6,l7,l8,l9,l10,math,a,b,c,c01,c00,d,d1,d2,d3,d4,d5,d6,d7,d8,d9,d10
for u in range(0,10):
a=r.randint(1,20)
b=r.randint(1,20)
c1=r.randint(1,100)
d=0
if c1>=0 and c1<=50:
d='+'
elif c1>=51 and c1<=100:
d='-'
c00.append(a)
c01.append(b)
dd.append(d)
s=str(a)+dd[u]+str(b)+'='
label=t.Label(w,text=s,font=('i.ttf',20))
label.place(x=600,y=o)
o+=35
l1=Entry(w)
l1.place(x=700,y=q)
q+=35
l2=Entry(w)
l2.place(x=z,y=q)
q+=35
l3=Entry(w)
l3.place(x=z,y=q)
q+=35
l4=Entry(w)
l4.place(x=z,y=q)
q+=35
l5=Entry(w)
l5.place(x=z,y=q)
q+=35
l6=Entry(w)
l6.place(x=z,y=q)
q+=35
l7=Entry(w)
l7.place(x=z,y=q)
q+=35
l8=Entry(w)
l8.place(x=z,y=q)
q+=35
l9=Entry(w)
l9.place(x=z,y=q)
q+=35
l10=Entry(w)
l10.place(x=z,y=q)
q+=35
math+=1
if math==1:
button['state'] = 'disabled'
def pf():
try:
e1=int(l1.get())
e2=int(l2.get())
e3=int(l3.get())
e4=int(l4.get())
e5=int(l5.get())
e6=int(l6.get())
e7=int(l7.get())
e8=int(l8.get())
e9=int(l9.get())
e10=int(l10.get())
except Exception:
showerror('一定是哪里出现了问题', '你输入的有非数字或没有输入完！')
fenshu=0
if dd[0]=='+' and e1==c00[0]+c01[0]:
fenshu+=10
elif dd[0]=='-' and e1==c00[0]-c01[0]:
fenshu+=10
if dd[1]=='+' and e2==c00[1]+c01[1]:
fenshu+=10
elif dd[1]=='-' and e2==c00[1]-c01[1]:
fenshu+=10
if dd[2]=='+' and e3==c00[2]+c01[2]:
fenshu+=10
elif dd[2]=='-' and e3==c00[2]-c01[2]:
fenshu+=10
if dd[3]=='+' and e4==c00[3]+c01[3]:
fenshu+=10
elif dd[3]=='-' and e4==c00[3]-c01[3]:
fenshu+=10
if dd[4]=='+' and e5==c00[4]+c01[4]:
fenshu+=10
elif dd[4]=='-' and e5==c00[4]-c01[4]:
fenshu+=10
if dd[5]=='+' and e6==c00[5]+c01[5]:
fenshu+=10
elif dd[5]=='-' and e6==c00[5]-c01[5]:
fenshu+=10
if dd[6]=='+' and e7==c00[6]+c01[6]:
fenshu+=10
elif dd[6]=='-' and e7==c00[6]-c01[6]:
fenshu+=10
if dd[7]=='+' and e8==c00[7]+c01[7]:
fenshu+=10
elif dd[7]=='-' and e8==c00[7]-c01[7]:
fenshu+=10
if dd[8]=='+' and e9==c00[8]+c01[8]:
fenshu+=10
elif dd[8]=='-' and e9==c00[8]-c01[8]:
fenshu+=10
if dd[9]=='+' and e10==c00[9]+c01[9]:
fenshu+=10
elif dd[9]=='-' and e10==c00[9]-c01[9]:
fenshu+=10
fs=t.Label(w,text=str(fenshu)+" ",font=('img/i.ttf',20))
fs.place(x=1300,y=10)
if fenshu==100:
py.mixer.music.play()
def clock():
global time1
time1=True
t=time()
while time1:
now=time()-t
time_1=t.Label(w,text=str(now),font=('img/i.ttf',20))
def time_end():
global time1
time1=False
w=t.Tk()
w.geometry("1400x788")
w.resizable(False,False)
w.title('加减法口算题卡')
lab=t.Label(w,text='分数:',font=('img/i.ttf',20))
lab.place(x=1200,y=10)
button=Button(w,text='生成算式',command=lambda:[clock(), random()])
button.pack()
m=Button(w,text='评分',command=pf)
m.pack()
photo=t.PhotoImage(file="img/bg.png")
bg=t.Label(w,image=photo,compound = t.CENTER,)
bg.pack()
w.mainloop()
出问题的地方：
def clock():
global time1
time1=True
t=time()
while time1:
now=time()-t
time_1=t.Label(w,text=now,font=('img/i.ttf',20))
def time_end():
global time1
time1=False
w=t.Tk()
w.geometry("1400x788")
w.resizable(False,False)
w.title('加减法口算题卡')
lab=t.Label(w,text='分数:',font=('img/i.ttf',20))
lab.place(x=1200,y=10)
button=Button(w,text='生成算式',command=lambda:[clock(), random()])
button.pack()
m=Button(w,text='评分',command=pf)
m.pack()
photo=t.PhotoImage(file="img/bg.png")
bg=t.Label(w,image=photo,compound = t.CENTER,)
bg.pack()
w.mainloop()
我想按下生成算式就开始计时，但是报错
