[Book Content] Python Advanced

Python Advanced

Original book Content Https://github.com/eastlakeside/interpy-zh

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Chapter	Title	Brief
1	*ARGV and **KWARGV	To input a variable parameter to a function	argv as a list,kwargv as a dictionary
2	Debug PDB	Breakpoint debugging at the code level
3	Generator	Defines a __iter__ or __getitem__ as an iterative object that defines __next__ as an iterator	The usefulness of yeild
4	Map, Filter and Reduce		-Map maps a function to all functions on a list, map (function_to_apply, list_of_outputs). Python3 returns an iterator that lists the list. -Filter filters The elements in the list and returns a list of all the elements that meet the requirements. -Reduce can perform some calculations on a list and return results, similar to merge.
5	Set data structure	Set cannot contain repeating elements	-Intersection: Set1.intersection (Set2) -Difference set: Set1.difference (Set2)
6	Decorative Device	There are other things to do during the execution of a function, you can use adorners, and more simply define adorners and use @
7	Object Change Mutation		Note The default value, and the Python default value is only initialized once
8	__slots__ Magic		Save small classes of resources
9	Virtual Environments	Virtualenv
10	Collections	Defaultdict, Counter, deque, Namedtuple, enum. Enum
11	Enumeration enumerate
12	Object Introspection (Introspection)	Dir, type, ID, inspect
13	Derivation formula (comprehension)	Construct a new data series from one data series structure of eg. List, Dict, set	The set's push-down is {}, because () the iterator is generated
14	Abnormal	Try, except, finally, else	No matter whether the touch does not trigger the exception to execute finally, the exception does not trigger the Execute else
15	Lambda expression	Lambda parameters: Actions (Parameters)
16	One-line	Simple webserver Nice print. Scripting Performance Analysis CSV to JSON List flat Row constructor	Python3-m Http.server From Pprint import Pprint Python-m Cporfile my_script.py ...
17	For else	Execute the Else statement when the loop is fully executed
18	Using the C extension	cTYPES, SWING, python/c API
19	Co-process	If the iterator is the creator of the data, then the process is the consumer	Line = (yield), through the external send to the association, you can execute the subsequent if pattern in line, close with close ()
20	function cache	The function cache allows us to cache a function for the return value of a given argument.	@lr_cache (maxsize=32), clearing the cache using Function.cache_clear ()
21st	Context management (with syntax)	Class-based implementation of __ENTER__ and __exit__ Handling Exceptions Generator-based @contextmanager

[Book Content] Python Advanced