python1

#Unicode universal code 2 bytes to store one character
 #Unicode 8byte 1 byte can put up to the 7th power of 2 -1 at least -2 to the 7th power
 #python operating mechanism interpreted language/compiled language (java C language)
 # hello.java-->hello.class
 #python js php js--> translate while executing
 # print(1+1)
 #1, variables do not need variables, no need to declare
 #a=10
 #Reference, all variables are Object
 # print(88,end="")
 #Expression without newline
 # print(90)
 #Default data type str
 # a=input('Please input:')
 # print("You:",a)
 '' '
 Multi-line comment
 '''
 # str="weather\nno\twrong"
 #ctrl+dcopy cursor line
 # str="weather\nno\twrong"
#\nNewline (\t Tab character defaults to Tab 8 or 4 spaces, generally python is 4 spaces in front if there is data to fill 4 spaces, no 4 spaces)
 # print(str) #Assignment
 together
 # a=b= c=1
 # print(a)
 # print(b)
 # print(c)

#Assignment respectively
 # a,b,c=10,2,3
 # print('default floating-point quotient',a/4)
 # print('remainder',a%4)
 # print('integer quotient',a| |4)
 # print('Power',10**2)
 #delete
 # del var del vara,varb
 # if 1==1:
 # print('1==1')
 # else:
 # print(' 1!=1')
 #
 #
 # if 1 in (1,2,3)
 # print('true')
 # e lif # a=input('Please enter a four-digit number:')
 # print('and =:')
 # num=int(input('Enter a number with four digits:'))
 # qian=num//1000
 # bai=num%1000//100
 # shi=num%100//10
 # ge= num%10
 # print(qian+bai+shi+ge)
 # a=int(input('Please enter the grade:'))
 # if ( a>=90):
# print('Excellent')


# elif ( a>=70):
 # print('good')
 # elif ( a>=60 ):
 # print('pass')
 # else:
 # print('fail')
 # import random
 # n= int (random.random()*10)
 # c=int(input('please input:'))
 # if c>n:
 # print('big')
 # elif c<n:
 # print('small')
 # else:
 # print('Yes')
 # print(c)
 b= int ( input ( 'Please enter the month:' ))
 if b in ( 1 , 3 , 5 , 7 , 8 , 10 ,12):
    


print ( 'month:' ,b, 'days:' , 31 )
 if b in ( 4 , 6 , 9 , 11 ):
     print ( 'month:' ,b, 'days:' , 30 )
 else :
    year= int ( input ( 'Please enter the year:' ))
     if :
 (year%4==0 and year%100!=0) or
    (year%100==0 and year%400==0):
print ( '29' ) else : print ( '28' )

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