python学习第一周

Posted 2020-10-21

一、python简单使用

1、简单程序编写
print("Hello World!")
name = "Laogui Lv"
print("My name is",name)
完成第一个程序，hello world以示正式进入python学习

2、变量赋值及变量输出
‘‘‘ ‘‘‘内代码可以换行
单行代码注释：#
多行代码注释：采用三个单引号或者三个双引号，要成套出现

# -*- coding:utf-8 -*- 
# Author:Laogui Lv
name = input("name:")
age = int(input("age:"))
print(type(age),type(str(age)))
job = input("job:")
salary = input("salary:")

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

info = ‘‘‘ 
------info of ‘‘‘ + name + ‘‘‘ -----
Name:‘‘‘ + name + ‘‘‘
Age:‘‘‘ + age + ‘‘‘
Job‘‘‘ + job + ‘‘‘
Salary:‘‘‘ + salary + ‘‘‘
‘‘‘
"""
#info是第一种格式输出

info2 = ‘‘‘ 
------info of %s -----
Name:%s
Age:%s
Job:%s
Salary:%s
‘‘‘ % (name,name,age,job,salary)
#info2是第二种格式输出

info3 = ‘‘‘ 
------info of %s -----
Name:%s
Age:%d
Job:%s
Salary:%s
‘‘‘ % (name,name,age,job,salary)
#info3是第三种格式输出

info4 = ‘‘‘ ------info of {0} -----
Name:{0}
Age:{1}
Job:{2}
Salary:{3}
‘‘‘.format(name,age,job,salary)
#info4是第四种格式输出

info5 = ‘‘‘ 
------info of {_name} -----
Name:{_name}
Age:{_age}
Job:{_job}
Salary:{_salary}
‘‘‘.format(_name=name,_age=age,_job=job,_salary=salary)
#info5是第五种格式输出

print(info5)

3、if-else判断语句、while循环

# -*- coding:utf-8 -*- 
# Author:Laogui Lv
guess_age = 25
count = 0
while count < 3:
    _guess_age = int(input("guess_age:"))
    if guess_age == _guess_age:
        print("yes,You got it.")
        break
    elif _guess_age > guess_age:
        print("Thinking is bigger...")
    else:
        print("Thinging is smaller...")
    count = count +1
    if count == 3:
        cont_guess = input("Do you want to continue?")
        if cont_guess != ‘n‘:
            count = 0
        else:
            print("Game over!")

4、for循环

# Author:Laogui Lv
guess_age = 25
count = 0
for i in range(3):
    _guess_age = int(input("guess_age:"))
    if  _guess_age == guess_age:
        print("You are right!")
    elif _guess_age < guess_age:
        print("please input bigger...")
    else:
        print("please input smaller...")
else:
    print("You‘re trying too many times..")