‘‘‘
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, ()(因为传输和存储必须是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)
原文地址:https://www.cnblogs.com/qingmuzi/p/12630268.html