python Lesson

python2 to python3 # 

# python2 
#Print () Print 'ABC' 
#range xrange () generator 
#raw_input () 

# to python3 
# Print ( 'ABC') 
# Range () 
# INPUT () 
# == assigned values for equality comparison is comparison, to compare the memory address, ID (content) 
# in Li1 = [l, 2,3] 
# LI2 in Li1 = 
# = LI2 LI3 
# Print (ID (in Li1), ID (LI2), ID (LI3)) 
# digital , small data string pool 
# -5--256 range of numbers 
# string: 1, can not have special 
# 2, s * 20 is the same address, s * 21 are two subsequent addresses 
# = I1. 6 
# I2 =. 6 
# Print (ID (I1), ID (I2)) 
# I1 = 300 
# I2 = 300 
# Print (ID (I1), ID (2)) 
A1 = 'aaaaaaaaaaaaaaaaaaaaaaaaaa' 
A2 = 'aaaaaaaaaaaaaaaaaaaaaaaaaa' 
Print (A1 IS A2) 

# remaining tuple SET dict List 
# L1 = [. 1,]
L2 = # [. 1,] 
# Print (L1 L2 IS) 

#ascii 
         # A: 00000000. 8 bits of a byte 
#unicode A: 00000000 00000000 00000000 00000000 32 Bit 4 bytes 
        # of: 00000000 00000000 00000000 00000000 4 32 bytes, 
# UTF-a. 8: 0010 0000 00000000. 8 bits of a byte 
        # of: 0,000,001,000,000,110 000 000 001 24 3 bytes 
#gbk a: 00000110 8 bits of a byte 
        # of: 0,000,000,010,000,001,016 words bit 2 section 
# 1, between the various binary coding, can not recognize each other, will be garbled 
# 2, file storage, transmission, is not unicode (only utf-8 utf-16 gbk, gb2312, asciid etc.) 
# Py3: 
#str in memory is stored in unicode 
     #bytes type 
     # for English: 
     #str: expressions: S = b'alex ' 
# 
# encoding: 000 101 010 
# UTF -. 8 
# GBK. . . . 
# 
# For the Chinese: 
# str: forms: s = 'China'
Encoding #: 010101010 
# Unicode 
# bytes: expressions: S = b'x \ E91 \ E91 \ E01 \ E21 \ E31 \ E32 ' 
# encoding: 000.10101 million 
# UTF -. 8 
# GBK. . . . 
# Buyers and sellers of goods money 
Li = [ 
    { 'name': 'apple', '. Price': 10}, 
    { 'name': 'banana', '. Price': 20 is}, 
    { 'name': 'watermelon' '. price': 30}, 
] 
# the goods on the shelves 
print ( 'Welcome to Kai Lai fruit shop') 
money = the INPUT ( 'Show me your money') 
IF money.isdigit () and int (money )> 0: 
    for I, K in the enumerate (Li): 
        . Print ( 'number {} trade {}, the price {}' the format (I, K [ 'name'], K [ '. price'])) 
    the Choose = input ( 'Please enter the number of goods you buy') 
    IF choose.isdigit () and int (the Choose) <len (li):


            int IF (Money)> Li [int (the Choose)] [ '. price'] * int (NUM): 
                Money = int (Money) -Li [int (the Choose)] [ '. price'] * int (NUM) 
                IF Li [int (the Choose)] [ 'name'] in shopping_car: 
                    shopping_car [Li [int (the Choose)] [ 'name']] = shopping_car [Li [int (the Choose)] [ 'name']] + int (NUM) 

            the else: 
                Print ( "beast, go back for money with your wife!") 


    the else: 
        Print ( 'say the number is, you silly ah!')