python的条件语句

---

字符串内变量赋值的方法

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name = input("name:")
age = int(input("age:"))
job = input("job:")
salary = input("salary:")

info = '''
---------- info of %s ----------
Name:%s
Age:%d
Job:%s
Salary:%s
''' % (name,name,age,job,salary)

info2 = '''
---------- info of {_name} ----------
Name:{_name}
Age:{_age}
Job:{_job}
Salary:{_salary}
''' .format(_name=name,_age=age,_job=job,_salary=salary)
print(info2)

---

if

import getpass

_username = "asdf"
_password = "123"
username = input("username:")
#password = getpass.getpass("password:")
password = input("password:")

if _username == username and _password == password:
    print("welcome user {name} login...".format(name=username))
else:
    print("Invalid username or password!")

---

while

age_of_oldboy = 56
count = 0
while count < 3:
    guess_age = int(input("guess age:"))
    if guess_age == age_of_oldboy:
        print("you got it!")
        break
    elif guess_age > age_of_oldboy:
        print("thing smaller")
    else:
        print("think bigger")
    count +=1
else:
    print("you try too many")

---

for

age_of_oldboy = 56
count = 0
for i in range(3):
    guess_age = int(input("guess age:"))
    if guess_age == age_of_oldboy:
        print("you got it!")
        break
    elif guess_age > age_of_oldboy:
        print("thing smaller")
    else:
        print("think bigger")
else:
    print("you try too many")

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