的Python的SyntaxError開放（）

Question

教程

http://docs.python.org/2/tutorial/inputoutput.html

>>> with open('workfile', 'r') as f: 
...  read_data = f.read() 
>>> f.closed 
True 

我的代碼，
在蟒蛇2.7.5

with open(filea, 'r') as f: 
     ^SyntaxError: invalid syntax 

爲什麼是語法錯誤？

Answer 1

你沒有在2.7.5中運行你的代碼;你在更早的時候運行它，可能是2.4或2.5。

~$ ~/sys/Python-2.5.6/python 
Python 2.5.6 (r256:88840, Jul 12 2012, 12:21:58) 
[GCC 4.6.3] on linux3 
Type "help", "copyright", "credits" or "license" for more information. 
>>> with open("fred") as f: 
<stdin>:1: Warning: 'with' will become a reserved keyword in Python 2.6 
    File "<stdin>", line 1 
    with open("fred") as f: 
      ^
SyntaxError: invalid syntax 

添加import sys和print sys.version看到你正在使用的真實版。