''' python2 python3 ''' #python2 #print() print 'abc' #range() xrange() 生成器 # raw_input() #python3 #print('abc') #range() # input() # = 赋值 == 比较值是否相等 is 比较,比较的是内存地址 id(内容) # li1 = [1,2,3] # li2 = li1 # li3 = li2 # print(id(li1),id(li2)) #数字,字符串 小数据池 #数字的范围 -5 -- 256 #字符串:1,不能有特殊字符 # 2,s*20 还是同一个地址,s*21以后都是两个地址 # i1 = 6 # i2 = 6 # print(id(i1),id(i2)) # i1 = 300 # i2 = 300 # print(id(i1),id(i2)) #剩下的 list dict tuple set # l1 = [1,] # l2 = [1,] # print(l1 is l2) # s = 'alex' # s1 = b'alex' # print(s,type(s)) # print(s1,type(s1)) # s = '中国' # print(s,type(s)) # s1 = b'中国' # print(s1,type(s1)) s1 = 'alex' # encode 编码,如何将str --> bytes, () s11 = s1.encode('utf-8') s11 = s1.encode('gbk') print(s11) s2 = '中国' s22 = s2.encode('utf-8') s22 = s2.encode('gbk') print(s22)