python第一天

#！usr/bin/env python   #声明环境变量 ，Windows不需要
#-*- coding:utf-8-*-          
# Author burnywen

name = "burnywen"
print("burnywen")

name = "burnywen"
name2  = name   
print(name,name2)
name = "banana"   #name2直接指向burnywen,不随name改变而改变
print(name,name2)  

输出：
burnywen burnywen
banana  burnywen 

十进制：130
        128  64  32  16   8   4   2   1
二进制   1    0   0   0    0   0   1   0

name = input("name:")
age =int(input("age:"))    #转换为integer
job = input("job:")
salary = int(input("salary:"))

info = """
 ----------info  of  %s------------
name:%s
age:%d
job:%s
salary:%d

"""%s(name,name,age,job,salary )


print(info)

info2 = """           #特定场景下只能用这种
 ----------info  of  {_name}------------
name:{_name}
age:{_age}
job:{_job}
salary:{_salary}

""".format(_name = name,
                 _age = age,
                 _job = job,
                 _salary = salary)

print(info2)


info3 = """       
 ----------info  of {0}------------
name:{0}
age:{1}
job:{2}
salary:{3}

""".format(name,age,job,salary)

print(info3)

#！usr/bin/env python
#-*- coding:utf-8-*-
# Author burnywen
age_of_burnywen = 23
count = 0
while count <3:

    age = int(input("guess age:"))
    if age == age_of_burnywen:
        print("you are right")
        break
    elif age > age_of_burnywen:
        print("think smaller...")
    else:
        print("think bigger...")
    count += 1

    if count ==3:
        retry = input("do you want to try?  y/n")
        if retry != "n":
            count=0
        continue

else:
    print("end...")