SyntaxError using`with open ...`

Question

有幾個關於SO的問題似乎與我的問題有關。但是，它們都是使用2.6以前版本的Python引起的。這裏不是這種情況。我感謝任何幫助追蹤這個原因。

當我嘗試使用with open() as f構造時，出現語法錯誤。

下面的代碼（test.py）：

#!/usr/bin/env python 

import sys 
print sys.version 

fname = "/tmp/test.txt" 

open(fname, 'a').close() 

with open(fname, 'a') as fh 
    fh.write("test") 

這裏的輸出：

$ ./test.py 
    File "./test.py", line 10 
    with open(fname, 'a') as fh 
          ^
SyntaxError: invalid syntax 

使用

Python版本：

$ /usr/bin/env python 
Python 2.7.10 (default, Oct 14 2015, 16:09:02) 
[GCC 5.2.1 20151010] on linux2 
Type "help", "copyright", "credits" or "license" for more information. 
>>> 

$ whereis python 
python: /usr/bin/python3.4 /usr/bin/python /usr/bin/python3.4m /usr/bin/python3.3 /usr/bin/python3.3m /usr/bin/python2.7 /usr/lib/python3.4 /usr/lib/python3.3 /usr/lib/python3.5 /usr/lib/python2.7 /etc/python3.4 /etc/python /etc/python3.3 /etc/python2.7 /usr/local/lib/python3.4 /usr/local/lib/python3.3 /usr/local/lib/python2.7 /usr/include/python2.7 /usr/share/python /usr/share/man/man1/python.1.gz 

我的系統信息：

$ uname -a 
Linux ... 4.2.0-27-generiC#32-Ubuntu SMP Fri Jan 22 04:49:08 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux 

謝謝！

Answer 1

你需要一個:你with聲明

with open(fname, 'a') as fh: 
    fh.write("test")