Python在使用While循环和Tkinter时出现问题

我试图在Python上制作这个时钟，但是出了点问题。在我激活它之后，pythonshell基本上什么都不做。这是我的密码：

#Time

import time
from tkinter import *

tk = Tk()
canvas = Canvas(tk,width = 500,height = 500)
tk.title('Clock')
tk.resizable = (0,0)
year_text = canvas.create_text(20,15,text = 'Today is the unknown day in unkown',font = ('Comic Sans MS',20),state = 'normal')
month_day_text = canvas.create_text(430,15,text = 'Unknown',font = ('Comic Sans MS',20),state = 'normal')
time_text = canvas.create_text(200,230,text = 'Unknown:Unknown:Unknown',font = ('Comic Sans MS',35),state = 'normal')
apm_text = canvas.create_text(235,300,text = 'Unknown',font = ('Comic Sans MS',25),state = 'normal')
activate = False


months = ['January','February','March','April','May','June','July','August','September','October','November','December']
week_days = ['Monday','Tuesday','Wednesday','Thursday','Friday','Saturday','Sunday']

activate = True


while activate == True:
    _timenow = time.localtime()
    __year = _timenow[0]
    __month = _timenow[1]
    __day = _timenow[2]
    __week_day = _timenow[6]
    __hour = _timenow[3]
    __minute = _timenow[4]
    __second = _timenow[5]
    __year_day = _timenow[6]


    _year = __year
    _month = months[__month - 1]
    _day = __day
    lday = str(_day)[-1]
    _week_day = week_days[__week_day]
    _hour = __hour
    _minute = __minute
    _second = __second
    _year_day = __year_day
    yday = str(_year_day)[-1]


    if lday == '1':
        day = str(_day) + 'st'

    elif lday == '2':
        day = str(_day) + 'nd'

    elif lday == '3':
        day = str(_day) + 'rd'

    elif lday not in ['1','2','3']:
        day = str(_day) + 'th'


    if _hour == 0:
        hour = '12'
        apm = 'A.M.'

    elif _hour < 12:
        hour = str(_hour)
        apm = 'A.M.'

    elif _hour == 12:
        hour = str(_hour)
        apm = 'P.M.'

    elif _hour >= 13:
        hour = str(_hour - 12)
        apm = 'P.M.'

    if yday == '1':
        year_day = str(_year_day) + 'st'

    elif yday == '2':
        year_day = str(_year_day) + 'nd'

    elif yday == '3':
        year_day = str(_year_day) + 'rd'

    elif yday not in ['1','2','3']:
        year_day = str(_year_day) + 'th'


    canvas.itemconfig(year_text,text = f'Today is the {year_day} day in {_year}')
    canvas.itemconfig(month_day_text,text = f'{_month} {day}')
    canvas.itemconfig(time_text,text = f'{hour}:{_minute}:{_second}')
    canvas.itemconfig(apm_text,text = f'{apm}')

---

我不知道我做错了什么。

如果不添加，您的Tkinter窗口将不会出现

tk.mainloop（）

最后

---

当你关闭应用程序时，你会收到一条消息，说明你的程序正在运行，因为你的while循环正在后台运行。在Tkinter中，Mainloop将确保你的应用程序将更新每个帧。我还建议你将“tk”重命名为“root”或“master”因为这些名称是最常用的名称。

画布从未在tkinter窗口中放置

pack

/

grid

/

place

tkinter需要调用

.mainloop（）

来管理图形更新，但是

.mainloop（）

是一个阻塞调用

您可以使用

.after（time，function）

在以毫秒为单位的一段时间后设置函数调用

尝试一下：

import time
from tkinter import *

def update():
    _timenow = time.localtime()
    __year = _timenow[0]
    __month = _timenow[1]
    __day = _timenow[2]
    __week_day = _timenow[6]
    __hour = _timenow[3]
    __minute = _timenow[4]
    __second = _timenow[5]
    __year_day = _timenow[7] # I think you wanted index 7 not 6


    _year = __year
    _month = months[__month - 1]
    _day = __day
    lday = str(_day)[-1]
    _week_day = week_days[__week_day]
    _hour = __hour
    _minute = __minute
    _second = __second
    _year_day = __year_day
    yday = str(_year_day)[-1]


    if lday == '1':
        day = str(_day) + 'st'

    elif lday == '2':
        day = str(_day) + 'nd'

    elif lday == '3':
        day = str(_day) + 'rd'

    elif lday not in ['1','2','3']:
        day = str(_day) + 'th'


    if _hour == 0:
        hour = '12'
        apm = 'A.M.'

    elif _hour < 12:
        hour = str(_hour)
        apm = 'A.M.'

    elif _hour == 12:
        hour = str(_hour)
        apm = 'P.M.'

    elif _hour >= 13:
        hour = str(_hour - 12)
        apm = 'P.M.'

    if yday == '1':
        year_day = str(_year_day) + 'st'

    elif yday == '2':
        year_day = str(_year_day) + 'nd'

    elif yday == '3':
        year_day = str(_year_day) + 'rd'

    elif yday not in ['1','2','3']:
        year_day = str(_year_day) + 'th'


    canvas.itemconfig(year_text,text = f'Today is the {year_day} day in {_year}')
    canvas.itemconfig(month_day_text,text = f'{_month} {day}')
    canvas.itemconfig(time_text,text = f'{hour}:{_minute}:{_second}')
    canvas.itemconfig(apm_text,text = f'{apm}')
    tk.after(1000, update)

tk = Tk()
canvas = Canvas(tk,width = 500,height = 500)
canvas.pack()
tk.title('Clock')
tk.resizable(0,0)
year_text = canvas.create_text(20,15,text = 'Today is the unknown day in unkown',font = ('Comic Sans MS',20),state = 'normal')
month_day_text = canvas.create_text(430,15,text = 'Unknown',font = ('Comic Sans MS',20),state = 'normal')
time_text = canvas.create_text(200,230,text = 'Unknown:Unknown:Unknown',font = ('Comic Sans MS',35),state = 'normal')
apm_text = canvas.create_text(235,300,text = 'Unknown',font = ('Comic Sans MS',25),state = 'normal')

months = ['January','February','March','April','May','June','July','August','September','October','November','December']
week_days = ['Monday','Tuesday','Wednesday','Thursday','Friday','Saturday','Sunday']

tk.after(10, update)
tk.mainloop()

导入时间
从tkinter进口*
def update（）：
_timenow=time.localtime（）
__年份=_timenow[0]
__月份=_timenow[1]
__day=\u timenow[2]
__week\u day=\u timenow[6]
__小时=_timenow[3]
__分钟=_timenow[4]
__秒=_timenow[5]
__year_day=_timenow[7]#我想你想要的是索引7而不是索引6
_年份=__年
_月=月[\u月-1]
_天=天
lday=str（_day）[-1]
_周日=周日
_小时=小时
_分钟
_秒=秒
_年\日=\年\日
yday=str（年日）[-1]
如果lday==“1”：
day=str（_day）+“st”
elif lday==“2”：
day=str（_day）+“nd”
elif lday==“3”：
day=str（_day）+“rd”
elif lday不在['1'、'2'、'3']中：
day=str（_day）+“th”
如果_hour==0：
小时='12'
apm=‘上午’
elif_小时<12小时：
小时=str（_小时）
apm=‘上午’
elif_小时==12：
小时=str（_小时）
apm='下午'
elif_小时>=13：
小时=str（小时-12）
apm='下午'
如果yday=='1'：
年日=str（年日）+“st”
elif yday==“2”：
年日=str（年日）+“nd”
elif yday==“3”：
年日=str（年日）+“rd”
elif yday不在['1'、'2'、'3']中：
年日=str（年日）+“th”
canvas.itemconfig（year_text，text=f'Today是{year}中的{year_day}天）
canvas.itemconfig（month\u day\u text，text=f'{u month}{day}'）
itemconfig（time_text，text=f'{hour}:{{minute}:{{second}'））
canvas.itemconfig（apm_text，text=f'{apm}'）
tk.之后（1000，更新）
tk=tk（）
画布=画布（tk，宽度=500，高度=500）
canvas.pack（）
标题（“时钟”）
tk.可调整大小（0,0）
年份文本=画布。创建文本（20,15，文本='今天是未知的未知日子'，字体=（'Comic Sans MS'，20），状态='正常'）
月\日\文本=画布。创建\文本（430,15，文本='Unknown'，字体=（'Comic Sans MS'，20），状态='normal'）
时间\文本=画布。创建\文本（200230，文本='Unknown:Unknown:Unknown'，字体=（'Comic Sans MS'，35），状态='normal'）
apm_text=canvas.create_text（235300，text='Unknown'，font=（'Comic Sans MS'，25），state='normal'）
月份=[‘一月’、‘二月’、‘三月’、‘四月’、‘五月’、‘六月’、‘七月’、‘八月’、‘九月’、‘十月’、‘十一月’、‘十二月’]
周日=[“星期一”、“星期二”、“星期三”、“星期四”、“星期五”、“星期六”、“星期日”]
tk.之后（10，更新）
tk.mainloop（）

Read

import time
from tkinter import *

def update():
    _timenow = time.localtime()
    __year = _timenow[0]
    __month = _timenow[1]
    __day = _timenow[2]
    __week_day = _timenow[6]
    __hour = _timenow[3]
    __minute = _timenow[4]
    __second = _timenow[5]
    __year_day = _timenow[7] # I think you wanted index 7 not 6


    _year = __year
    _month = months[__month - 1]
    _day = __day
    lday = str(_day)[-1]
    _week_day = week_days[__week_day]
    _hour = __hour
    _minute = __minute
    _second = __second
    _year_day = __year_day
    yday = str(_year_day)[-1]


    if lday == '1':
        day = str(_day) + 'st'

    elif lday == '2':
        day = str(_day) + 'nd'

    elif lday == '3':
        day = str(_day) + 'rd'

    elif lday not in ['1','2','3']:
        day = str(_day) + 'th'


    if _hour == 0:
        hour = '12'
        apm = 'A.M.'

    elif _hour < 12:
        hour = str(_hour)
        apm = 'A.M.'

    elif _hour == 12:
        hour = str(_hour)
        apm = 'P.M.'

    elif _hour >= 13:
        hour = str(_hour - 12)
        apm = 'P.M.'

    if yday == '1':
        year_day = str(_year_day) + 'st'

    elif yday == '2':
        year_day = str(_year_day) + 'nd'

    elif yday == '3':
        year_day = str(_year_day) + 'rd'

    elif yday not in ['1','2','3']:
        year_day = str(_year_day) + 'th'


    canvas.itemconfig(year_text,text = f'Today is the {year_day} day in {_year}')
    canvas.itemconfig(month_day_text,text = f'{_month} {day}')
    canvas.itemconfig(time_text,text = f'{hour}:{_minute}:{_second}')
    canvas.itemconfig(apm_text,text = f'{apm}')
    tk.after(1000, update)

tk = Tk()
canvas = Canvas(tk,width = 500,height = 500)
canvas.pack()
tk.title('Clock')
tk.resizable(0,0)
year_text = canvas.create_text(20,15,text = 'Today is the unknown day in unkown',font = ('Comic Sans MS',20),state = 'normal')
month_day_text = canvas.create_text(430,15,text = 'Unknown',font = ('Comic Sans MS',20),state = 'normal')
time_text = canvas.create_text(200,230,text = 'Unknown:Unknown:Unknown',font = ('Comic Sans MS',35),state = 'normal')
apm_text = canvas.create_text(235,300,text = 'Unknown',font = ('Comic Sans MS',25),state = 'normal')

months = ['January','February','March','April','May','June','July','August','September','October','November','December']
week_days = ['Monday','Tuesday','Wednesday','Thursday','Friday','Saturday','Sunday']

tk.after(10, update)
tk.mainloop()