Python数据结构详解-优快云博客

tuples(元组):

在Python里面，tuples的定义很简单，例如，xy=45,59,然后使用就用xy[0],xy[1]来使用：

__author__="Alex" __date__ ="$2011-2-17 10:39:27$" if __name__ == "__main__": print "Hello"; xy=45,97 x=xy[0]#set x as xy[0] print(x) y=xy[1]#set y as xy[1] print(y)

控制台输出：

Hello 45 97

如何给数组Set值

Python是以索引来区分你给数组赋值的，用append加值进去无论你放进去的是什么类型，int，float，string，甚至是方法，看下面一段代码就知道是怎样赋值的了：

__author__="Alex" __date__ ="$2011-2-17 10:39:27$" if __name__ == "__main__": print "Hello"; i = [] # create an empty set k = [ ' hi', 4, 5 ] # create a set with values print(k) i.append( 4 ) # append an entry to the set i print(i) i.append(5)# append another entry to the set i print(i) j = i[0] # j becomes 4 print(j) print(len( i )) # returns 1, the number of entries of i print(len( k )) # returns 3 print(k[-1]) # returns 5, the last entry of k

控制台输出：

Hello [' hi', 4, 5] [4] [4, 5] 4 2 3 5

dictionary(字典类型)

Python的字典类型是用关键字来排序的，例如定义numbers = { 'ben': 3, 'tina': 9 } 那么就代表这个字典里面Alex的值为3，而Viki的值为9，然后可以使用Numbers['Alex']来对这个值进行操作。

__author__="Alex" __date__ ="$2011-2-17 10:39:27$" if __name__ == "__main__": print "Hello"; numbers = { 'Alex': 3, 'Viki': 9 } # creates a dictionary numbers = dict( Alex=3, Viki=9) # creates the same dictionary with a different syntax numbers['Alex'] = 'unknown' # change the value of the 'Alex' entry in the dictionary if numbers['Alex'] == 3: print('yes') # using a dictionary in a condition else: print('no') for n in numbers: print( n ) # prints out 'Alex' and on the next line 'Viki' for n in numbers: print( numbers[n] ) # prints out 'unknown' and on the next line 9

输出：

Hello no Viki Alex 9 unknown