Python list and dictionary (by key, sorted by value) __python

Source: Internet
Author: User
Tags python list
python dict sorted by key:

1, Method 1.

Items = dict. Items () Items.Sort () for Key,value in Items:print key, value # print Key,dict[key]

2, Method 2.

Print key, Dict [key] for key ' in sorted (Dict. Keys ())

  python dict sorted by value:

Method 1:

Separate the elements in the dictionary into a list and sort the list to indirectly sort the dictionary. This "element" can be Key,value or item.


#用lambda表达式来排序, more flexible: sorted (dict. Items (), Lambda X, y:cmp (x[1], y[1]) #降序 sorted (dict. Items (), Lambda X, y:cm P (x[1], y[1]), reverse = True)

The following is a help document for the Python built-in sorted function:

Sorted (...)
Sorted (iterable, Cmp=none, Key=none, Reverse=false)--> new sorted list python list sort:

The list has a sort method:

Such as:
>>> s=[2,1,3,0]
>>> S.sort ()
[0, 1, 2, 3]

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