7/22练习

GUI-try.py

@@ -0,0 +1,43 @@
+import tkinter
+import tkinter.messagebox
+
+
+def main():
+ flag = True
+
+ # 修改标签上的文字
+ def change_label_text():
+ nonlocal flag
+ flag = not flag
+ color, msg = ('red', 'Hello, world!')\
+ if flag else ('blue', 'Goodbye, world!')
+ label.config(text=msg, fg=color)
+
+ # 确认退出
+ def confirm_to_quit():
+ if tkinter.messagebox.askokcancel('温馨提示', '确定要退出吗?'):
+ top.quit()
+
+ # 创建顶层窗口
+ top = tkinter.Tk()
+ # 设置窗口大小
+ top.geometry('240x160')
+ # 设置窗口标题
+ top.title('小游戏')
+ # 创建标签对象并添加到顶层窗口
+ label = tkinter.Label(top, text='Hello, world!', font='Arial -32', fg='red')
+ label.pack(expand=1)
+ # 创建一个装按钮的容器
+ panel = tkinter.Frame(top)
+ # 创建按钮对象 指定添加到哪个容器中 通过command参数绑定事件回调函数
+ button1 = tkinter.Button(panel, text='修改', command=change_label_text)
+ button1.pack(side='left')
+ button2 = tkinter.Button(panel, text='退出', command=confirm_to_quit)
+ button2.pack(side='right')
+ panel.pack(side='bottom')
+ # 开启主事件循环
+ tkinter.mainloop()
+
+
+if __name__ == '__main__':
+ main()

HelloWorld.ipynb

@@ -14,7 +14,7 @@
  },
  "orig_nbformat": 2,
  "kernelspec": {
- "name": "python_defaultSpec_1595328768214",
+ "name": "python_defaultSpec_1595382085762",
  "display_name": "Python 3.7.6 64-bit ('base': conda)"
  }
  },
@@ -52,10 +52,10 @@
  }
  ],
  "source": [
- "List=[1,2,3] #列表\n",
- "Tup=(1,2,3) #元组\n",
+ "List=[1,2,3]  #列表\n",
+ "Tup=(1,2,3)  #元组\n",
  "Dict={'frist':1,'second':2} #字典\n",
- "a={1,2,3} #集合\n",
+ "a={1,2,3}  #集合\n",
  "\n",
  "print(f'hahaha{List[1]}')"
  ]
@@ -70,15 +70,15 @@
  "source": [
  "import sys\n",
  " \n",
- "def fibonacci(n): # 生成器函数 - 斐波那契\n",
+ "def fibonacci(n):  # 生成器函数 - 斐波那契\n",
  " a, b, counter = 0, 1, 0\n",
  " while True:\n",
  " if (counter > n): \n",
  " return\n",
  " yield a\n",
  " a, b = b, a + b\n",
  " counter += 1\n",
- "f = fibonacci(100) # f 是一个迭代器，由生成器返回生成\n",
+ "f = fibonacci(100)  # f 是一个迭代器，由生成器返回生成\n",
  "\n",
  "for i in range (0,5):\n",
  " print(next(f))\n"
@@ -99,7 +99,7 @@
  ],
  "source": [
  "import cmath\n",
- "class vector: #运算符重载\n",
+ "class vector: #运算符重载,向量的实现\n",
  " def __init__(self,a,b):\n",
  " self.a=a\n",
  " self.b=b\n",
@@ -119,79 +119,64 @@
  },
  {
  "cell_type": "code",
- "execution_count": 62,
+ "execution_count": 4,
  "metadata": {
  "tags": []
  },
  "outputs": [
  {
  "output_type": "stream",
  "name": "stdout",
- "text": "2 1\n"
+ "text": "2 3\n"
  }
  ],
  "source": [
- "a=1\n",
- "b=2\n",
- "a,b=b,a\n",
- "print(a,b)"
+ "x=3\n",
+ "y=2\n",
+ "(x, y) = (y, x) if x > y else (x, y)\n",
+ "print(x,y)"
  ]
  },
  {
  "cell_type": "code",
- "execution_count": 70,
+ "execution_count": 40,
  "metadata": {
  "tags": []
  },
  "outputs": [
  {
  "output_type": "stream",
  "name": "stdout",
- "text": "True\n"
+ "text": "\\d\n格式化字符 你好 格式化数字 2020\nf字符串: 无视转义符\nformat应用:第一 第二 第一\n数字format: +3.14(保留小数) \n xxx2020(向左补全x,7位为止)\n 2020(补空格)\n"
  }
  ],
  "source": [
- "def isPalindrome(x: int) -> bool: #回文数判断\n",
- " original_num=x\n",
- " reversed_num = 0\n",
- " while x > 0:\n",
- " reversed_num = reversed_num * 10 + x % 10\n",
- " x //= 10\n",
- " if (reversed_num==original_num):\n",
- " return True\n",
- " else:\n",
- " return False\n",
- "\n",
- "print(isPalindrome(121))"
+ "#字符串格式化\n",
+ "a=r'无视转义符\\d'\n",
+ "print(a[5:8])#左闭右开原则\n",
+ "print('格式化字符 %s 格式化数字 %d'%('你好',2020))\n",
+ "print(f'f字符串: {a[0:5]}')\n",
+ "print('format应用:{0} {1} {0}'.format(\"第一\",'第二'))\n",
+ "print('数字format: {0:+.2f}(保留小数) \\n {1:x>7d}(向左补全x,7位为止)'.format(3.14159,2020))\n",
+ "print('{0:>15d}(补空格)'.format(2020))"
  ]
  },
  {
  "cell_type": "code",
- "execution_count": 110,
+ "execution_count": 48,
  "metadata": {
  "tags": []
  },
  "outputs": [
  {
  "output_type": "stream",
  "name": "stdout",
- "text": "1*\n"
+ "text": "4321\n"
  }
  ],
  "source": [
- " n=2\n",
- " ans='1*'\n",
- " if(n==1):\n",
- " print(ans)\n",
- " else:\n",
- " for i in range(1,n):\n",
- " k=0\n",
- " j=k*2\n",
- " while(ans[j]==ans[j+1] and j+1<=len(ans)):\n",
- " k=k+1\n",
- " j=j+1\n",
- " ans=str(j+1)+ans[j]\n",
- " print(ans)"
+ "c='1234'\n",
+ "print(c[::-1])"
  ]
  }
  ]