Python formatted output and operators

Dictionary set list >>> dic={' Egon ': [' 123 ', 3], ' Alex ': [' alex3714 ',3]}>>> dic{' Egon ': [' 123 ', 3], ' Alex ': [' alex3714 ', 3]}>>> dic[' Alex ' [' alex3714 ', 3]>>> dic[' Alex '][0] ' alex3714 ' list set dictionary >>> user_ info=[{' Egon ': ' 123 '},{' Alex ': ' 123 '},{' Wupeiqi ': ' 123 '}]>>> user_info[{' Egon ': ' 123 '}, {' Alex ': ' 123 '}, {' Wupeiqi ': ' 123 '}]>>> user_info[1]{' Alex ': ' 123 '}>>> user_info[1][' Alex '] ' 123 ' Multiple nested types 1, two list nesting > >> users=[[' Egon ', ' 123 '],[' Alex ', ' 123 ']]>>> users[[' Egon ', ' 123 '], [' Alex ', ' 123 ']]>>> users [0] [' Egon ', ' 123 ']>>> users[0][1] ' 123 ' 2, list nested dictionary >>> users=[{' Egon ': ' 123 '},{' Alex ': ' alex3714 '}]> >> users[1]{' Alex ': ' alex3714 '}>>> users[1][' Alex '] ' alex3714 ' 3, dictionary >>> users={' Egon ': ' 123 ', '                      Alex ': ' alex3714 '}>>> users[' Alex '] ' alex3714 ' >>> ' Alex ' in users # #确认alex是否是users的keyTrue # #存在就显示Ture # # # #格式化输出1, the best way to use >>> name= ' Egon ' >>> print (' My name is ' +name ' My name isegon>>> print (' My name was ' +name) My name is Egon because of the creation of a new Module 2, >>> name= ' eg On ' >>> print (' My name was ', name) My name is egon##########%s############% represents a placeholder s for a string >>> name= ' Egon ' >>> age=18>>> print (' My name is:%s My-is%s '% (name,age)) #前面用了几个占位符后面也要用几个占位符占位符多用% () My name I S:egon my age is 18############################ #格式化输出练习现有一个练习需求. The user's name, age, work, hobby, and then print to the following format------------info of Alex Li-------------Name:alex liage:22job:teacherhobbie:girl------ -------End------------------------users=[{' username ': ' Alex ', ' age ': ' + ', ' job ': ' Teacher ', ' hobbie ': ' Girl '},{' Username ': ' Egon ', ' age ': ' + ', ' job ': ' Teacher ', ' hobbie ': ' Study '},]msg= '------------info of%s-------------Name:% SAge:%sjob:%shobbie:%s-------------end------------------------'% (users[1][' username '],users[1][' username '],u sers[1][' age '],users[1][' job '],users[1][' Hobbie ']) print (msg) ######### #改变类型 ###############>>> age=input(' Your name: ') your name:18>>> print (Age,type (age)) <class ' str ' > #显示的是字符串, we want to see that it is an integer >>> age= Input (' Your name: ') your name:16>>> age=int (age) >>> Print (Age,type (age)) <class ' int ' >##### # # # #上面的操作太复杂, it is easier to write out ################ #age =int (Input (' Your Age: ')) print (Age,type (age) >>> age=int (Input (' Your age: ') your age:18>>> print (Age,type (age)) <class ' int ' > instead converts it to a string of STR () ##################### # # #运算符 >>> print (Age,type (age)) <class ' int ' >>>> x=10>>> y=20>>> z=x + y >>> z30>>> 10-30-20>>> 10*30300>>> 2/50.4>>> 3/50.6>>> 3//50 >>> 5/31.6666666666666667>>> 55>>> 5//3 only takes integer part 1>>> 5%32>>> 2**3 2 of 3 Square 8 ############# #比较运算 >>> x=10>>> y=10>>> ID (x), type (x), X (1712829792, <class ' int '), 10 ) >>> ID (y), type (y), X (1712829792, <class ' int '), 10) integer is small so id equal x is ytrue so x is y################ #整数比较大的时候 >>> x= 222222222222222222222222222222222222222222222>>> y=222222222222222222222222222222222222222222222> >> ID (x), type (x), X (38291232, <class ' int ';, 222222222222222222222222222222222222222222222) >>>   ID (y), type (y), Y (38291088, <class ' int ';, 222222222222222222222222222222222222222222222) ID value is different The system will put the larger number in a different location x is Yfalsex = = Yture But the two numbers are equal ################ #不等于! =>>> x= ' A ' >>> y=1>>> x = yfalse>>> x! = ytrue greater than >>> x=2>>> y=1> >> 2 > 1True less than >>> x=1>>> y=2>>> x < ytrue>=>>> x=1>>> Y=1 >>> x >= ytrue#################>>> ' A ' > ' B ' false>>> ' Asdsdsada ' > ' B ' false>> > ' ABCSADSSD ' < ' B ' true>>> ' Absadsdsad ' < ' AA ' falsea-z z max a minimum first bit equal then second bit ############################ Assignment arithmetic >>> count=1>>> count+=1>>> count2>>> num=10>>> num//=3>>> num3>>> num**=2>>> num9################### ########## #逻辑运算 >>> True and truetrue>>> False and truefalse>>> 1 > 0 and < 20true>& Gt;> >>> True or falsetrue>>> >>> not True or falsefalse>>> user={' a ': 1}>>& Gt ' A ' in usertrue>>> not ' a ' in userfalse>>> ' a ' not in Userfalse

　　

Python formatted output and operators