python集合用法实例分析
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：
#setsareunorderedcollectionsofuniquehashableelements #Python23testedvegaseat09mar2005 #Pythonv2.4hassetsbuiltin importsets print"Listthefunctionswithinmodule'sets':" forfunkindir(sets): printfunk #createanemptyset set1=set([]) #nowloadtheset forkinrange(10): set1.add(k) print"\nLoadedasetwith0to9:" printset1 set1.add(7) print"Triedtoaddanother7,butitwasalreadythere:" printset1 #makealistoffruitsasyouputthemintoabasket basket=['apple','orange','apple','pear','orange','banana'] print"\nTheoriginallistoffruits:" printbasket #createasetfromthelist,removestheduplicates fruits=sets.Set(basket) print"\nThesetisunique,buttheorderhaschanged:" printfruits #let'sgetridofsomeduplicatewords str1="SenatorStromThurmonddressedasasTarzan" print"\nOriginalstring:" printstr1 print"Alistofthewordsinthestring:" wrdList1=str1.split() printwrdList1 #nowcreateasetofuniquewords strSet=sets.Set(wrdList1) print"Thesetofthewordsinthestring:" printstrSet print"Convertsetbacktostring(orderhaschanged!):" print"".join(strSet) print #comparingtwosets,bearwithme... colorSet1=sets.Set(['red','green','blue','black','orange','white']) colorSet2=sets.Set(['black','maroon','grey','blue']) print"colorSet1=",colorSet1 print"colorSet2=",colorSet2 #sameas(colorSet1-colorSet2) colorSet3=colorSet1.difference(colorSet2) print"\nThesearethecolorsincolorSet1thatarenotincolorSet2:" printcolorSet3 #sameas(colorSet1|colorSet2) colorSet4=colorSet1.union(colorSet2) print"\nThesearethecolorsappearinginbothsets:" printcolorSet4 #sameas(colorSet1^colorSet2) colorSet5=colorSet1.symmetric_difference(colorSet2) print"\nThesearethecolorsincolorSet1orincolorSet2,butnotboth:" printcolorSet5 #sameas(colorSet1&colorSet2) colorSet6=colorSet1.intersection(colorSet2) print"\nThesearethecolorscommontocolorSet1andcolorSet2:" printcolorSet6
希望本文所述对大家的Python程序设计有所帮助。
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