python ---- fundamental iteration
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2024-01-15 09:14:10
- those in python can use for loops, and those can traverse?
答:iterable objects or objects that umplenment iterator protocols can be traversed
probably include: dictionary,list,string,file,tuple
2.it’s wrong to ttraverse the dictionary table like this

- all objects that can be iterated are due to the existence of a next function, which is used in the follwing ways

- instead of using f.readlines() to iterate in actual development, use f directly or new method , which takes up less internal memory

- what objects can be iterated?
an object that contains the next method is an iterative object
- to determine whether an object uses a method,use is an follows

- objects paid by files can only be used once
10.
- add iters method to urls,which can be used to implement next() function

- summary
15.
- making elements capitalized or filtering certain elements

- other silly ways
- example of map() and zip()

- summary