Python--day 1

 俗话说的好，掌握一门语言要从掌握 print("hello world")开始

print("hello world")
#变量
name = "GTT"
name1 = name
print("My name is ", name, name1)
name = "WZ"
print("My name is ", name, name1)
msg ='''
name1通过name直接找到数据所在的地址
变量名一定要有名义
python中没有常量的概念 一般大写代表常量
------------------------------------------
'''

#字符编码 Unicode
#UTF-8是对Unicode的优化
print("你好 世界！")
print(msg)

#用户输入
username = input("username:")
userpasswd = input("passwd:")
print(username, userpasswd)

name = input("name:")
age =  input("age:")
job =  input("job:")
salay =  input("salay:")

#字符串拼接
info='''
----------info of '''+ name +'''----------
Name:'''+ name +'''
Age:'''+ age +'''
job:'''+ job+'''
salay:'''+ salay +''''''
print(info)
#info在内存中开辟多个内存空间 效率低

info1='''
----------info1 of %s----------
Name:%s
Age:%s
job:%s
salay:%s
''' % (name, name, age, job, salay)
print(info1)
#%d %f 也是可以的 这样可以帮助监测数据类型
#input默认输入的都是字符串，python强类型定义语言 需要强转
#age = int(input("age:"))

info2 = '''
----------info2 of {_name}----------
Name:{_name}
Age:{_age}
job:{_job}
salay:{_salay}
'''.format(_name=name, _age=age, _job=job, _salay=salay)
print(info2)

info3 = '''
----------info3 of {0}----------
Name:{0}
Age:{1}
job:{2}
salay:{3}
'''.format(name, age, job, salay)
print(info3)