python之路-基础篇-001

操作系统： Mac OS X 10.10.5
python: Python 3.5.1 
IDE:PyCharm4.5

y-pc:~ root# python3
Python 3.5.1 (v3.5.1:37a07cee5969, Dec  5 2015, 21:12:44)
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> print("Hello World.")
Hello World.
>>> 

y-pc:PycharmProjects root# echo ‘#!/usr/bin/env python3‘ > hello.py
y-pc:PycharmProjects root# echo ‘print("Hello World.")‘ >>hello.py
y-pc:PycharmProjects root# more hello.py
#!/usr/bin/env python3
print("Hello World.")
y-pc:PycharmProjects root# chmod +x hello.py
y-pc:PycharmProjects root# ./hello.py
Hello World.
y-pc:PycharmProjects root# 

>>> name = ‘felo‘
>>> age = 20

[‘and‘, ‘as‘, ‘assert‘, ‘break‘, ‘class‘, ‘continue‘, ‘def‘, ‘del‘, ‘elif‘, ‘else‘, ‘except‘, ‘exec‘, ‘finally‘, ‘for‘, ‘from‘, ‘global‘, ‘if‘, ‘import‘, ‘in‘, ‘is‘, ‘lambda‘, ‘not‘, ‘or‘, ‘pass‘, ‘print‘, ‘raise‘, ‘return‘, ‘try‘, ‘while‘, ‘with‘, ‘yield‘]

myName　　　　　　#第一个词全部小写，后面每个词首字母大写
MyName    　　　 #每个词首字母大写
my_name　　　    #每个词之间用下划线分隔

>>> name = input(‘input your name:‘)
input your name:felo
>>> name
‘felo‘

>>> import getpass
>>> passwd = getpass.getpass(‘input your password:‘)
input your password:
>>> passwd
‘123456‘