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return S and S.strip () 5 def filter_t EST (func,iter): 6 res = [] 7 for i in iter:8 i = func (i) 9 if i:10 res.append (i) return RES12 p Rint (Filter_test (NOT_EMPTY,AA)) #[' A ', ' B ', ' C ']15 #2. Filter built-in function test print (list (filter (NOT_EMPTY,AA))) #[' a ' , ' B ', ' C ']19 #把列表中空字符串, empty elements, all removedThe key to the filter () function is to implement a filtering function correctly,Note: the filter () function returns a it

num1 * NUM2/GCD (NUM1, num2) print gcd (24 , 18 ) print LCM (24 , 18 ) 5-16 household finances. Given an initial amount and monthly cost, use the loop to determine the remaining amount and the current month's expenditure, including the last expenditure. The Payment () function uses the initial and monthly amounts, and the output should resemble the following format (the numbers in the example are for demonstration purposes only): def pay():Balance = Float (raw_input (' Enter Opening balance

anonymous function a name, which makes it possible for us to invoke the anonymous function>>> add = lambda x, y:x+y >>> add It is equivalent to a regular function>>> def add2 (x, y): ... return x+y ... >>> add2 If you define an anonymous function and you want to bind a name to it, it's a bit superfluous, usually using a lambda function directly. So where is the correct usage scenario for the LAMDBA function?1. Function-Type programmingAlthough Python

We usually call functions that can be used as variables, called higher-order functions. Functional programming refers to higher-order function programmingExample 1:The sum of the absolute values of the two numbers.Analytic: Absolute function abs, we can define a function, the ABS as one of the variablesdef f (x,y,c): return C (x) + C (y) n = f ( -5,6,abs) prin

Beginner script Language Python, test the available TCP communication programs:Server:#!/usr/bin/env python#-*-coding:utf-8-*-import socketimport threadingimport timedef tcplink (sock, addr): print (' Accept new connection from%s:%s ... '% addr); Sock.send (b ' Welcome!!! '); While True: data = SOCK.RECV (1024x768); Time.sleep (1); I

Python TCP Socket programming detailed Beginner script Language Python, test the available TCP communication programs: Server: #!/usr/bin/env python #-*-coding:utf-8-*- Import Socket import Threading import Time def tcplink (sock, addr): C4/>print (' Accept new connecti

1,false corresponding to integral type 0the Python object that ② has has a built- in true or False value. The Boolean value of the following object is false:None;False (Boolean type);All the values are zero numbers;0 (integral type);0.0 (floating point type);0L (Long integer type);0.0+0.0j (plural );"" (empty string);[] (empty list);() (empty tuple);{} (empty dictionary);The Boolean value of an object that is not a value other than the one listed abo

Getting started with concurrent programming using the greenlet package in Python, pythongreenlet 1 motivation The greenlet package is a by-product of Stackless. It calls microthreads "tasklet ". Tasklet runs in pseudo-concurrency and uses channel for synchronous data exchange. A "greenlet" is a more primitive micro-thread concept, but it is not scheduled or called coroutine. This is useful when you need to

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