打印在Python 3.3中不起作用？

Question

我在Visual Studio Professional 2013 RC中运行Python。我已安装the Python Tools for Visual Studio，它随Python 3.3一起提供。

我只是做一个非常简单的打印语句，但它报告语法错误。

print 'aaa' 

而且，在我进入输入，解释拒绝打印出来aaa。 截图如下：从解释

错误消息：

>>> print '1 
... ' 
... 
Traceback (most recent call last): 
    File "C:\Program Files\Microsoft Visual Studio 12.0\Common7\IDE\Extensions\Microsoft\Python Tools for Visual Studio\2.0\visualstudio_py_repl.py", line 627, in run_one_command 
    self.execute_item() 
    File "C:\Program Files\Microsoft Visual Studio 12.0\Common7\IDE\Extensions\Microsoft\Python Tools for Visual Studio\2.0\visualstudio_py_repl.py", line 601, in execute_code_work_item 
    code = compile(self.current_code, '<stdin>', 'single', self.code_flags) 
    File "<stdin>", line 1 
    print '1 
     ^
SyntaxError: EOL while scanning string literal 
>>> a=1 
>>> print a 
Traceback (most recent call last): 
    File "C:\Program Files\Microsoft Visual Studio 12.0\Common7\IDE\Extensions\Microsoft\Python Tools for Visual Studio\2.0\visualstudio_py_repl.py", line 627, in run_one_command 
    self.execute_item() 
    File "C:\Program Files\Microsoft Visual Studio 12.0\Common7\IDE\Extensions\Microsoft\Python Tools for Visual Studio\2.0\visualstudio_py_repl.py", line 601, in execute_code_work_item 
    code = compile(self.current_code, '<stdin>', 'single', self.code_flags) 
    File "<stdin>", line 1 
    print a 
     ^
SyntaxError: invalid syntax 
>>> 

我以前玩的Python 2.7版。为什么它在3.3？

Answer 1

print is no longer a statement in Python 3，它是一个功能print()，因此正确的语法是：

print('aaa')