wxpython 报错

准备期末考试了但是我不慌
今天我继续来整活了
这个是代码：

import wx
class MyFrame(wx.Frame):
    def __init__(self,parent,id):
        wx.Frame.__init__(self,parent,id,title = "登录",size = (1600,900))
        #创建画板
        panel = wx.Panel(self)
        #创建文本和输入框
        self.static_title = wx.StaticText(panel,label = '你被锁屏了,输入密码以解锁',pos = (140,20))
        self.label_user = wx.StaticText(panel,label = '密码：',pos = (50,70))
        self.useer_name = wx.TextCtrl(panel,pos = (100,70),size = (220,25),style = wx.TE_PASSWORD)
if __name__ == '__main__':
    app = wx.App
    frame = MyFrame(None,id = -1)
    frame.Show()
    app.MainLoop()

然后它报错：

Traceback (most recent call last):
  File "D:\window\Loin.py", line 13, in <module>
    frame = MyFrame(None,id = -1)
  File "D:\window\Loin.py", line 4, in __init__
    wx.Frame.__init__(self,parent,id,title = "登录",size = (1600,900))
wx._core.PyNoAppError: The wx.App object must be created first!