我这个语法怎么出错了呢？我瞅了半天都没发现

#file文件操作_操作系统底层关系_写入文件
a =open("b.py","b")
c="live\nI live you\n“
a.write(c)
a.close()

Collecting pyinstaller

  Downloading pyinstaller-4.1.tar.gz (3.5 MB)

ERROR: Exception:

Traceback (most recent call last):

  File "C:\Program Files\Python38\lib\site-packages\pip\_vendor\urllib3\response.py", line 425, in _error_catcher

    yield

  File "C:\Program Files\Python38\lib\site-packages\pip\_vendor\urllib3\response.py", line 507, in read

    data = self._fp.read(amt) if not fp_closed else b""

  File "C:\Program Files\Python38\lib\site-packages\pip\_vendor\cachecontrol\filewrapper.py", line 62, in read

    data = self.__fp.read(amt)

  File "C:\Program Files\Python38\lib\http\client.py", line 458, in read

    n = self.readinto(b)

  File "C:\Program Files\Python38\lib\http\client.py", line 502, in readinto

    n = self.fp.readinto(b)

  File "C:\Program Files\Python38\lib\socket.py", line 669, in readinto

    return self._sock.recv_into(b)

  File "C:\Program Files\Python38\lib\ssl.py", line 1241, in recv_into

    return self.read(nbytes, buffer)

  File "C:\Program Files\Python38\lib\ssl.py", line 1099, in read

    return self._sslobj.read(len, buffer)

ConnectionResetError: [WinError 10054] 远程主机强迫关闭了一个现有的连接。

During handling of the above exception, another exception occurred:

Traceback (most recent call last):

  File "C:\Program Files\Python38\lib\site-packages\pip\_internal\cli\base_command.py", line 188, in _main

    status = self.run(options, args)

  File "C:\Program Files\Python38\lib\site-packages\pip\_internal\cli\req_command.py", line 185, in wrapper

    return func(self, options, args)

  File "C:\Program Files\Python38\lib\site-packages\pip\_internal\commands\install.py", line 332, in run

    requirement_set = resolver.resolve(

  File "C:\Program Files\Python38\lib\site-packages\pip\_internal\resolution\legacy\resolver.py", line 179, in resolve

    discovered_reqs.extend(self._resolve_one(requirement_set, req))

  File "C:\Program Files\Python38\lib\site-packages\pip\_internal\resolution\legacy\resolver.py", line 362, in _resolve_one

    abstract_dist = self._get_abstract_dist_for(req_to_install)

  File "C:\Program Files\Python38\lib\site-packages\pip\_internal\resolution\legacy\resolver.py", line 314, in _get_abstract_dist_for

    abstract_dist = self.preparer.prepare_linked_requirement(req)

  File "C:\Program Files\Python38\lib\site-packages\pip\_internal\operations\prepare.py", line 467, in prepare_linked_requirement

    local_file = unpack_url(

  File "C:\Program Files\Python38\lib\site-packages\pip\_internal\operations\prepare.py", line 255, in unpack_url

    file = get_http_url(

  File "C:\Program Files\Python38\lib\site-packages\pip\_internal\operations\prepare.py", line 129, in get_http_url

    from_path, content_type = _download_http_url(

  File "C:\Program Files\Python38\lib\site-packages\pip\_internal\operations\prepare.py", line 281, in _download_http_url

    for chunk in download.chunks:

  File "C:\Program Files\Python38\lib\site-packages\pip\_internal\cli\progress_bars.py", line 166, in iter

    for x in it:

  File "C:\Program Files\Python38\lib\site-packages\pip\_internal\network\utils.py", line 15, in response_chunks

    for chunk in response.raw.stream(

  File "C:\Program Files\Python38\lib\site-packages\pip\_vendor\urllib3\response.py", line 564, in stream

    data = self.read(amt=amt, decode_content=decode_content)

  File "C:\Program Files\Python38\lib\site-packages\pip\_vendor\urllib3\response.py", line 529, in read

    raise IncompleteRead(self._fp_bytes_read, self.length_remaining)

  File "C:\Program Files\Python38\lib\contextlib.py", line 131, in __exit__

    self.gen.throw(type, value, traceback)

  File "C:\Program Files\Python38\lib\site-packages\pip\_vendor\urllib3\response.py", line 443, in _error_catcher

    raise ProtocolError("Connection broken: %r" % e, e)

pip._vendor.urllib3.exceptions.ProtocolError: ("Connection broken: ConnectionResetError(10054, '远程主机强迫关闭了一个现有的连接。', None, 10054, None)", ConnectionResetError(10054, '远程主机强迫关闭了一个现有的连接。', None, 10054, None))

WARNING: You are using pip version 20.1.1; however, version 20.3.3 is available.

You should consider upgrading via the 'C:\Program Files\Python38\python.exe -m pip install --upgrade pip' command.

老师，这个报错可能是什么原因导致的？

在setting安装了pyinstall 

安pyinstaller有错误

这个解压代码可以解压有密码的压缩包吗

老师，self.pukes[0],这里的0代表是第一个元素，跟后面鼠标左键点击触发事件有什么影响呢？这里不大理解

为什么换了其他数字不行，如果因为0是第一个元素，那为什么只有第一个元素可以呢

请问老师，从哪里可以下载坦克image的图片

try:
    a=int(input('请输入一个被除数：'))
    b=int(input('请输入一个除数：'))
    c=float(a)/float(b)
    print(c)
except ZeroDivisionError:
    print('除数不能为0')
except NameError:
    print('变量不存在')
except ValueError:
    print('字符串不能转化成数字')

老师您好：

我在查看ZeroDivisionError的从属关系时，看到下边的结果，我的python是3.7，多出来一个typing.Hashable. 百度有hashable模块的的解释，但是没有这块的详细说明. 请老师大致解释一下。感谢~

一、程序

'''测试一个经典的GUI程序的写法，使用面向对象的方式'''
from tkinter import *
from tkinter import messagebox
class Application(Frame):
    def __init__(self,master=None):
        '''调用Frame构造方法'''
        super().__init__(master)#这一行的master和下一行的master有什么联系？master有什么具体含义
        self.master=master
        self.pack()#调用布局管理器，这一行的作用是什么？好像没有需要显示的内容
        self.creatWidget()#调用创建的组件，为什么要在定义类属性里边调用creatWidget?
    def creatWidget(self):
        '''创建组件'''
        self.btn01=Button(self)
        self.btn01['text']='点击送花'
        self.btn01.pack()
        self.btn01['command']=self.songhua

        #创建一个退出按钮
        self.btnQuit=Button(self,text='退出',command=root.destroy)
        self.btnQuit.pack()
    def songhua(self):
        messagebox.showinfo('送花','送你99朵玫瑰花')

if __name__=='__main__':
    root=Tk()
    root.geometry('400x100+200+300')
    root.title('一个经典的Gui程序类测试')
    app=Application(master=root)
    root.mainloop()

二、问题

老师，我把问题注释在程序里边了，谢谢老师解答！

一、代码如下：

tkinter *

(Frame):
    (,master=):
        ().(master)
        .master = master
        .pack()
        .createWidget()

    ():
        Entry().grid(=,=,=,=,=)

        textbtn = ((,,,),
                   (,,,),
                   (,,,),
                   (,,,),
                   (,,,),
                   (,))
        rindex,r (textbtn):
            cindex,c (r):
                c == :
                    Button(,=c,=)\
                        .grid(=rindex+,=cindex,=,=EW)
                c == :
                    Button(,=c,=)\
                        .grid(=rindex+,=cindex,=,=NSEW)
                c == :
                    Button(,=c,=)\
                        .grid(=rindex+,=cindex+,=EW)
                :
                    Button(,=c,=)\
                        .grid(=rindex+,=cindex,=NSEW)



__name__ == :
    root = Tk()
    root.geometry()
    root.title()
    app = Application(=root)
    root.mainloop()

二，运行结果显示为“=”不跨行，如下图：

我检查了代码，没有发现有什么问题，程序也没有报错，我看到提问区也有人在问这个问题，但是没有看到老师就此问题的回答。

老师你好：

请问在创建optionmenu组件之后，怎样改变下拉框中的内容，把原来的值换掉，摸索了很久，都没成功，如上图，比如在蓝色框那里加一条怎样的语句可以实现

老师，我的子类myTanke继承了父类Tanke，子类中定义的方法，在调用时显示没有该方法的

老师，为什么我按照你的命令区敲，输出的跟你的不一样？哪里出了问题？

from 模块名 import 函数名，也会将导入的模块的代码都执行一遍吗？还是只导入对应函数的定义，而不会执行被导入的模块的可执行语句？也就是说 from 模块名 import 函数名 这种导入方法还需不需要if __name__=="main"的控制语句？

高老师这是什么情况呀