Python Development function Advanced: An iterative & iterator & Generator

One, an iterative

#iterable an iterative
#str
#列表
#tuple
#set
#dict

#可迭代的--The corresponding Mark __iter__
# print (' __iter__ ' in dir ([+)]) #判断一个变量是不是一个可迭代的

Iterative conversion to iterator method

1 #!/usr/bin/env python2 #*_*_cod:utf-8_*_3 4 #Convert an iterator into an iterator5L = [1,2,3,4,5]6  forIinchL:7     Print(i)8 Print(ITER (L))#built-in function iter = = L._iter_ ()9 Print(L.__iter__())

Second, iterators

#迭代器 are mostly used inside python, and we'll just use them.
#迭代器: Built-in __iter__ and __next__ methods

Iterators Implement for Loops

1 #!/usr/bin/env python2 #*_*_cod:utf-8_*_3 4L = [1,2,3,4,5]5L_iterator =iter (L)6 Print(L_iterator.__next__())7 Print(L_iterator.__next__())8 Print(L_iterator.__next__())9 Print(L_iterator.__next__())Ten Print(L_iterator.__next__()) OneNext (L_iterator)#==l_iterator.__next__ () A  whileTrue: Write your own equivalent for loop -     Try: -         Print(Next (l_iterator)) the     exceptstopiteration: -          Break

Summary:

#!/usr/bin/env python#*_*_cod:utf-8_*_#iterators are mostly used inside python, and we can just use them.#iterators: Built-in __iter__ and __next__ methods fromCollectionsImportiterable fromCollectionsImportIterator#An easy way to determine whether it is an iterator or an iterative object#s = ' abc '#Print (Isinstance (s,iterable)) s is not an iterative object#Print (Isinstance (s,iterator)) s is not an iterative object#Print (Isinstance (ITER (s), Iterator))

Python Development function Advanced: An iterative & iterator & Generator