The tenth chapter: Pythonの Network Programming advanced

The main topic of this lesson

• Scope Additions in Python
• Socketserver Source
• Homework this week

Scope Additions in Python

1. There are no block-level scopes in the Python world .： cannot print name in java/c+ world.
   

   # can't print name in java/c+ world. # but in the Python/javascript world, you can print name. if 1 = = 1:      ... ' Janice '  Print(name) Janice

   no block-level scope in Python (small knowledge point one)

    for  in range: ...     =print(name)9

   no block-level scope in Python (small Knowledge Point II)
2. But in the Python/javascript world you can print name. In Python, a function is used as the scope.
   

    >>> del   name  >>> def   Func (): ... name  = "  janice   "  ...  >>> print    <STDIN>  Span style= "color: #800000;" > ", line 1, in  <module>nameerror: Name   name    is  not  defined 

   in Python, a function is used as a scope (small knowledge point III)
3. Python is a scoped chain, and for the scope, its scope has been determined before the function is executed, and the scope chain has been determined.
   

   ' Alex ' # This is F1 () is a scope, it is an internal scope def F1 ():      ... Print  #  This is F2 () is scoped def  F2 (): ...      ' Eric ' ...      >>> F2 () Alex

   Python is a scoped chain (small knowledge point four)

   >>> name ='Alex'# This is F1 () is a scope, it is an internal scope>>>defF1 (): ...Print(name) ...#this is F2 () is a scope>>>defF2 (): ... name='Eric'...     returnF1 ...>>> ret =F2 ()>>> ret ()#this is equivalent to running F1 ()Alex

   Python is a scoped chain (small knowledge point five)
4. for Loop, then add 1 to each element, and finally generate a list
   

   # it executes a for loop, then adds 1 to each element, and finally generates a list  forif x > 6]print(LI)

   Python Lambda + for loop (small knowledge point six)

   >>> Li2 = [lambda for in range]>>> ret = li2[0] () Print (ret)9

   Python Lambda + for loop (small knowledge point seven)

   >>> li = [] for in range: ...      def F1 (x=i): ...         return x     ... ...      Print (Li[0] ()) 0 Print (Li[1] ()) Print (Li[2] ())2

   Python Lambda + for loop (small knowledge point eight)

Socketserver Source

I used IO multiplexing.

Multithreading, multiple layers, and processes

Homework this week

Day10 Job

References

Silver Horn King: the path to Python "seventh": threads, Processes, and co-routines

Golden Horn King:

The tenth chapter: Pythonの Network Programming advanced