Three ways to access the Python dictionary

Definition dictionary dic = {' A ': ' Hello ', ' B ': ' How ', ' C ': ' You '}

Method One:

For key in DIC:

Print Key,dic[key]

Print key + str (Dic[key])

Results:

A Hello
Ahello
C You
Cyou
b How
bhow

Details:

Print Key,dic[key], followed by a comma, automatically generates a space

Print key + str (Dic[key]), connecting two strings, with a plus sign, direct output, without commas in the middle

Method Two:

for (K,V) in Dic.items ():

Print "dic[%s]="%k,v

Results:

dic[a]= Hello
dic[c]=
dic[b]= How

Method Three:

For k,v in dic.items (): #Python3中已经废除iteritems, use items instead

Print "dic[%s]="%k,v

Results:

dic[a]= Hello
dic[c]=
dic[b]= How

Items () returns a Iterator object. For example:

Print Dic.items () #<dictionary-itemiterator object at 0x020e9a50>

Drill Down: Iteritor is the meaning of iterators, one time to back up a data item, know no so far

For I in Dic.items ():
Print I
Result: (' A ', ' hello ')
(' C ', ' you ')
(' B ', ' how ')

Three ways to access the Python dictionary