python generator comprehension

02, iterator Objects that can be iterated:Internal containing __iter__ follows an iterative protocol# Print (dir (' 123 ')) # ' __iter__ '# print (' __iter__ ' in Dir ([1, 2, 3])# Print (' __iter__ ' in dir ({' name ': ' Alex '})# print (' __iter__ ' in dir ({' name '})#) # Print (' __iter__ ' in Dir ((1, 2, 3))# print (' __iter__ ' in Dir (1)) # False# c15> print (' __iter__ ' in Dir (True)) # False iterator: An iterative object. __iter__ () can be converted to an iterator that sati

The first section decorator Review and Knowledge reserve------------The first section of the decorator Review and Knowledge reserve------------def wrapper (*args,**kwargs): index (*ARGS,**KWARGS) # * is the role of breaking the positional parameters to the value of args=[a,b,c]# * * The function is to break the keyword parameters to Kwargs=[a,b,c]def index (A,B,C): print (a,b,c) wrapper (' TT ', ' pppp ', c= ' VVV ') Two: Functions can be passed as data. A function can pass as a parameter

#!/usr/bin/env pythonimport randomimport stringimport syssimilar_char = ' 0ooii1lpp ' upper = '. Join (Set ( String.uppercase)-Set (Similar_char)) lower = ". Join (Set (String.lowercase)-Set (Similar_char)) symbols = '!#$%\* +,-./:; [Email protected]^_ ' ~ ' numbers = ' 123456789 ' group = (upper, lower, symbols, numbers) def getpass (lenth=8):p w = [Random.choi CE (i) for i in Group]con = ". Join (group) for I in range (Lenth-len (PW)):p w.append (Random.choice (Con)) random.shuffle (PW) Return

-1: + yieldP - Else: + forResultinchQueens (num, state+[P]): A yield[result, p] at - - def play3 (l): - """ - to crack a sub-list in the returned results list - """ in Try: - Try: L +"' to except Typeerror:pass + Else: Raise TypeError - forIinchL: the forSinchPlay3 (i): * yields $ except TypeError:Panax Notoginseng yieldL - the def printqueens (l): + "

RequirementsWrite a program that can automatically generate small poems.The format is as followsSource CodeImport Randomimport sysarticles = ["The", "a", "another", "her", "he"]subjects = ["Cat", "dog", "horse", "Man", "Woman", "Boy", "girl"]verbs = ["sang", "ran", "jumped", "said", "fought", "swam", "saw", "heard", "Felt", "slept", "hopped", "hoped", "cried", "laughed", "walked"]adverbs = ["loudly", "Q Uietly "," quickly "," slowly "," well "," badly ", " rudely "," politely "]line

1 #/bin/python32 ImportSYS3 Import Time4 ImportRandom5STRs = [i forIinchRange (32,128)] #产生密码的ASCII码的序列6Length =10 #生成密码长度7#下面这个函数用来生成Length长度的密码8 defrandomstr (strs,length):9Liststr = []Ten forIinchRange (length): One liststr.append (Random.choice (STRs)) A returnListstr - defstrings (): -String ="" thechar =randomstr (strs,length) - forIinchChar: -string+=chr (i) - returnstring +#上面这个函数将调用randomstr函数, returns a string password - +Start =Time.time ACount =1

The embryonic form of asynchronous IO:Simple single-threaded parallel effectImport timedef Consumer (name): print ("%s ready to eat buns!") "%name) while True: baozi = yield print (" Bun [%s] came, eaten by [%s]! " "% (baozi,name)) C = Consumer (" Chenronghua ") c.__next__ () #调用只唤醒 yield# b1=" Leek Stuffing "# # C.send (B1) #调用yield并传值 #c.__next__ () def producer (name): C = Consumer (' A ') c2 = consumer (' B ') c.__next__ () c2.__next__ () print (" Lao Tzu