Python---Iteration

#  Iteration #  If given a list or tuple, we can traverse the list or tuple through a for loop, which we call an iteration (iteration) #  in Python, the iteration is through the for  ... in, and in many languages such as C or Java, the iteration list is a high abstraction of the # python for loop done by subscript, because Python's for loop can be used not only on list or tuple, It is also possible to #  iterations on other iterative objects dict#  because Dict's storage is not arranged in list order, the resulting order of the iterations is likely to be different #  by default dict iterations key#  If you want to iterate over value, you can use For value in d.values () #  If you want to iterate both key and value at the same time, you can use the For k, v in  d.items () #  determines that an object is an iterative object by the iterable type of the collection module from collections import iterabled  = {' A ': 1,  ' B ': 2,  ' C ':  3}print (' iterative key ') for key in d:     print (key) print (' Iteration value ') for value in d.values ():     Print (value) print (' Iterative key&value ') For k, v in d.items ():     print (K,  V) #  Iteration string print (' Iteration string ') for ch in  ' ABC ':     print (CH) #  Whether Str can iterate print (isinstance (' abc ', &NBSP, iterable)) # list whether the print (Isinstance ([1, 2, 3], iterable)) #  integer can be iterated by the print (isinstance (123, iterable)) #  uses Python's built-in enumerate function to turn a list into an index-element pair that iterates through both the index and the element itself in the For loop for i, value in enumerate ([' A ',  ' B ',  ' C ']):     print (I, value)

Python---Iteration