python study notes basic training day1

python pre-school basics

1. Download and install python3 ( https://www.python.org/downloads/), the default installation

2. Configure Environment Variables【右键计算机】--》【属性】--》【高级系统设置】--》【高级】--》【环境变量】--》【在第二个内容框中找到变量名为Path 的一行，双击】 --> 【Python安装目录追加到变值值中】

3. Install pycharm, from the setting - "file and code templates can set the default template.

#_*_coding：utf-8_*_

hello world program

print('hello word!')
#输出：hello word!

variable

Variable names can not be digital initials

Variables are made to be assigned, it points to a specific memory address memory

= NAME1 ' python ' 
NAME2 = NAME1 
NAME1 = ' Java ' 
Print (NAME2)
 # output is python

Three kinds of multi-line format output

name = input('please input your name:')
age = input('please input your age:')
job = input('please input your job:')
salary = input('please input your salary:')
info = '''
-------------info of %s------------
name:%s
age:%s
job:%s
salary:%s'''%(name,name,age,job,salary)
print(info)

name = input('username:')
age = input('age:')
salary = input('salary:')
info ='''
------------------name is {_name}----------------
username：{_name}
age:{_age}
salary:{_salary}
'''.format(_name = name,_age = age,_salary = salary)
print(info)

name = input('username:')
age = input('age:')
salary = input('salary:')
info ='''
------------------name is {0}----------------
username：{0}
age:{1}
salary:{2}
'''.format(name,age,salary)
print(info)

Additional knowledge base day1 python

The python can not be two completely different things together but can be doubled by an integer such as:

Print ( ' L Love Money ' +5) # output is a fail 
Print ( ' L Love Money ' * 5) # output 5 times i love money

However, the string is spliced such as:

Print ( ' S ' + ' PAM ' ) # output is a spam

python basis day1 exercises and answers

1. require user input values 0-100, the printing is less than 50 'to lose you' if more than 50 print 'you mistyped'

INPUT = NUM ( ' Please you INPUT Number 0-100: ' ) 
NUM = int (NUM)
 IF NUM <= 50 :
     Print ( " you lose the right ' )
 the else :
     Print ( " you mistyped ' )

View Code

2. three chances to guess the age, the age of '23' to guess a little older has prompted a 'young', 'old'

_age = '23'
count = 0
while True:
    if count == 3:
        break
    age = input('guess age:')
    if age > _age :
        print('old')
    elif age < _age :
        print('young')
    else:
        print('good work!')
        break
    count = count +1

View Code

3. Write the login procedure, the user has entered incorrectly three times more than three times the opportunity to enter the wrong lock, enter the password is not visible

name = 'python'
key = '123@intel'
count = 0
while True:
    username = input('username:')
    password = input('password:')
    if count < 3:
        if username == name and password == key :
            print('welcome user %s'%(name))
        else:
            print('invalid username or password!')
            count +=1
    else:
        print('you have been locked!')

View Code

--- end --- restore content

python study notes basic training day1

Guess you like