输出：print()

在Python2中：

>>> print('hello world')
hello world
>>> print('hello world')
hello world
>>> print 'hello world'
hello world
>>> print "hello world"
hello world

在Python3中：

>>> print 'hello world'
  File "<stdin>", line 1
    print 'hello world'
                      ^
SyntaxError: Missing parentheses in call to 'print'
>>> print "hello world"
  File "<stdin>", line 1
    print "hello world"
                      ^
SyntaxError: Missing parentheses in call to 'print'
>>> print("hello world")
hello world
>>> print('hello world')
hello world
>>> 

在Python2中

>>> print('hello','world')
hello world
>>> print "hello","world"
hello world

在Python3中：

>>> print("print","world")
print world

>>> print "hello","world"

  File "<stdin>", line 1
    print "hello","world"
                ^
SyntaxError: Missing parentheses in call to 'print'

说明在Python3中，print一定得使用括号。

输入：input()

#!/usr/bin/env Python
# coding=utf-8

name = input("输入您的名称：")
print ("hello ,",name)

结果：

mobao$ python3 hello.py
输入您的名称：wxx
hello , wxx