本文实例讲述了python集合用法。分享给大家供大家参考。具体分析如下：
# sets are unordered collections of unique hashable elements# python23 tested vegaseat 09mar2005# python v2.4 has sets built inimport setsprint list the functions within module 'sets':for funk in dir(sets): print funk# create an empty setset1 = set([])# now load the setfor k in range(10): set1.add(k)print \nloaded a set with 0 to 9:print set1set1.add(7)print tried to add another 7, but it was already there:print set1# make a list of fruits as you put them into a basketbasket = ['apple', 'orange', 'apple', 'pear', 'orange', 'banana']print \nthe original list of fruits:print basket# create a set from the list, removes the duplicatesfruits = sets.set(basket)print \nthe set is unique, but the order has changed:print fruits# let's get rid of some duplicate wordsstr1 = senator strom thurmond dressed as as tarzanprint \noriginal string:print str1print a list of the words in the string:wrdlist1 = str1.split()print wrdlist1# now create a set of unique wordsstrset = sets.set(wrdlist1)print the set of the words in the string:print strsetprint convert set back to string (order has changed!):print .join(strset)print# comparing two sets, bear with me ...colorset1 = sets.set(['red','green','blue','black','orange','white'])colorset2 = sets.set(['black','maroon','grey','blue'])print colorset1 =, colorset1print colorset2 =, colorset2# same as (colorset1 - colorset2)colorset3 = colorset1.difference(colorset2)print \nthese are the colors in colorset1 that are not in colorset2:print colorset3# same as (colorset1 | colorset2)colorset4 = colorset1.union(colorset2)print \nthese are the colors appearing in both sets:print colorset4# same as (colorset1 ^ colorset2)colorset5 = colorset1.symmetric_difference(colorset2)print \nthese are the colors in colorset1 or in colorset2, but not both:print colorset5# same as (colorset1 & colorset2)colorset6 = colorset1.intersection(colorset2)print \nthese are the colors common to colorset1 and colorset2:print colorset6
希望本文所述对大家的python程序设计有所帮助。