Python基础语法，,# -*- codi

Python基础语法，,# -*- codi

# -*- coding:utf8 -*-print "hello python"if True:    print "True"else:    print"False"x = "a"y = "b"# 换行输出# 中文注释报错，需要加入  # -*- coding:utf8 -*-print xprint y# 不换行输出输出print x,print y,counter = 100  # 赋值整形变量miles = 100.0  # 浮点型name = "John"  # 字符型print counterprint milesprint  namea = b = c = 1print a, b, cprint aprint bprint ca, b, c = 1, 2, "john"print a, b, cvar1 = 1var2 = 10print"var1的值是", var1del var1print "处理后var1的值是空"str = ‘Hello World!‘print str  # 输出完整字符串print str[0]  # 输出字符串中的第一个字符print str[2:5]  # 输出字符串中第三个至第五个之间的字符串print str[2:]  # 输出从第三个字符开始的字符串print str * 2  # 输出字符串两次print str + "TEST"  # 输出连接的字符串print "================="list = [‘runoob‘, 786, 2.23, ‘john‘, 70.2]tinylist = [123, ‘john‘]print list  # 输出完整列表print list[0]  # 输出列表的第一个元素print list[1:3]  # 输出第二个至第三个的元素print list[2:]  # 输出从第三个开始至列表末尾的所有元素print tinylist * 2  # 输出列表两次print list + tinylist  # 打印组合的列表print "======================="tuple = (‘runoob‘, 786, 2.23, ‘john‘, 70.2)tinytuple = (123, ‘john‘)print tuple  # 输出完整元组print tuple[0]  # 输出元组的第一个元素print tuple[1:3]  # 输出第二个至第三个的元素print tuple[2:]  # 输出从第三个开始至列表末尾的所有元素print tinytuple * 2  # 输出元组两次print tuple + tinytuple  # 打印组合的元组tuple = ( ‘runoob‘, 786 , 2.23, ‘john‘, 70.2 )list = [ ‘runoob‘, 786 , 2.23, ‘john‘, 70.2 ]# tuple[2] = 1000   元组中是非法应用list[2] = 1000     # 列表中是合法应用print list[2]print "======================"dict = {}dict[‘one‘] = "This is one"dict[2] = "This is two"tinydict = {‘name‘: ‘john‘, ‘code‘: 6734, ‘dept‘: ‘sales‘}print dict[‘one‘]  # 输出键为‘one‘ 的值print dict[2]  # 输出键为 2 的值print tinydict  # 输出完整的字典print tinydict.keys()  # 输出所有键print tinydict.values()  # 输出所有值

Python基础语法