Codecademy Python和Pyscripter给出错误消息

Question

我目前正在使用Codecademy让我的脚湿透Python。我学习速度非常快，已经安装并正在使用Pyscripter在Codecademy课程中创建自己的程序。当我将Codecademy的代码复制并粘贴到Pyscripter并尝试运行它时，通常会在Codecademys网站上完美运行时发生错误。是否有不同的Python版本？或者是Codecademy没有教导适当的基础？我已经包含了一个代码示例和我收到的错误。从Pyscripter接收

def power(base, exponent): # Add your parameters here! 
    result = base**exponent 
    print "%d to the power of %d is %d." % (base, exponent, result) 

power(37, 4) # Add your arguments here! 

错误：消息文件名线位置
的SyntaxError
无效的语法（13行）13 40

又如：

from datetime import datetime 
now = datetime.now() 

print ('%s/%s/%s') % (now.year, now.month, now.day) 

错误：消息文件名线位置
回溯
TypeError：不支持的操作数类型为％：'NoneType'和'元组'
当我使用％s和％时，似乎有一段时间。

任何澄清将不胜感激。

Answer 1

这是Python 2和3之间的区别，是的。

Python 2.7.3 (default, Apr 10 2012, 23:31:26) [MSC v.1500 32 bit (Intel)] on win32 
Type "help", "copyright", "credits" or "license" for more information. 
>>> from datetime import datetime 
>>> now = datetime.now() 
>>> 
>>> print ('%s/%s/%s') % (now.year, now.month, now.day) 
2014/2/23 

Python 3.3.2 (v3.3.2:d047928ae3f6, May 16 2013, 00:03:43) [MSC v.1600 32 bit (Intel)] on win32 
Type "help", "copyright", "credits" or "license" for more information. 
>>> from datetime import datetime 
>>> now = datetime.now() 
>>> 
>>> print ('%s/%s/%s') % (now.year, now.month, now.day) 
%s/%s/%s 
Traceback (most recent call last): 
    File "<stdin>", line 1, in <module> 
TypeError: unsupported operand type(s) for %: 'NoneType' and 'tuple' 
>>> print ('{0}/{1}/{2}'.format(now.year, now.month, now.day)) 
2014/2/23 

它的核心是围绕在Python 2中的语句，并在Python 3