python-3.x-Basic data types

The current learning version is: python-3.6-4

Code:

1 """Integral type number"""2A = 2 * * 53b = A + 44c = A/45D = A//46E = a% 57F,g = 120,1128H = 3 + 4j9i = 4 + 8jTenj = h *I One Print(A,B,C,D,E,F,G,J) A  - """String Type""" -str ='wo shi Zhang san!' the #str[0] = ' 1 ' #字符串单个字符不可被修改 - Print(str[0:-3]) - Print(str[0:1]) - Print(Str[1:5])#output subscript 1 to subscript 4, which is a second to fifth character string + Print(STR * 4) - Print(str +str) +  A """the list type lists""" atList = ["Zhangsan","Lisi","Wangwu","Zhaoliu","Zhouqi"] -LIST[4] ="Xiaozhe" #elements can be modified - Print(list) - Print(List[0:3]) - Print(List +list) -  in """tuple meta-group""" - #ple = ("1", ' 2 ') toTuple = (1,2,3,4,5,6,7) + #tuple[4] = #元素不可以被修改否则报错 -Etuple = ()#Empty tuple theOtuple = (1)#single element tuple *  $ Print(Tuple[0:2])Panax Notoginseng Print(Tuple * 3) - Print(etuple) the Print(otuple) +  A """Set Set type""" theSet1 = {"Zhangsan","Lisi","Wangwu",'Lisi',"Xiao Qi"} + #per = set ("Nishi", "Woshi", "Tashi") #创建一个新的集合 -per = Set ("Nishi")#to create a new collection $ Print(Set1,per) $A = set ('Abracadabra') -b = Set ('Alacazam') -  the Print("set-a =", a) - Print("set-b =", B)Wuyi  the Print("A-B =", A-B)#the difference between A and B -  Wu Print("A | b =", a | b#the set of A and B -  About Print("A & B =", A & B)#intersection of A and B $  - Print("a ^ b =", a ^ b)#elements in A and b that do not exist at the same time -  - """Word typical""" A #Key-value pairs are stored in the form of a JSON-like representation of a middle key value +Dict = {}#a step must be declared as a dictionary type thedict["1"] ="C + +" -dict["2"] ="Java" $dict["3"] ="C" thedict["4"] ="python" the Print(dict) the Print(dict["4"]) the Print(Dict.keys ()) - Print(Dict.values ())

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python-3.x-Basic data types