python中使用tab補全

標籤：python

要能夠使用import tab，最主要的是要有readline模組。預設python2.6雖然沒有裝tab模組，但是裝了readline模組的。如下：

[[email protected] robin]# python2.6
Python 2.6.6 (r266:84292, Nov 22 2013, 12:16:22)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import tab
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named tab
>>> import readline

>>>

而python2.7預設tab模組和readline模組都沒有安裝

[[email protected] robin]# python
Python 2.7.5 (default, Apr 16 2015, 15:21:18)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import tab
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named tab
>>> import readline
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named readline

python2.6能夠import readline成功的原因是因為有這個模組：/usr/lib64/python2.6/lib-dynload/readline.so （預設安裝就有的），python2.7.5不能import readline成功的原因就是沒有這個模組。所以將這個模組cp到python2.7的相關目錄下既可以了。操作如下：

[[email protected] lib-dynload]# cp  /usr/lib64/python2.6/lib-dynload/readline.so /usr/local/lib/python2.7/lib-dynload/
[[email protected] lib-dynload]# python
Python 2.7.5 (default, Apr 16 2015, 15:21:18)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import readline
>>> 

然後在/usr/local/lib/python2.7/site-packages 添加一個tab.py檔案即可使用import tab，內容如下；

[[email protected] site-packages]# pwd
/usr/local/lib/python2.7/site-packages
[[email protected] site-packages]# cat tab.py
try:
    import readline
except ImportError:
    print("Module readline not available.")
else:
    import rlcompleter
    readline.parse_and_bind("tab: complete")

進行測試：

>>> import readline
>>> import tab
>>> import os
>>> os.w
os.wait(     os.wait3(    os.wait4(    os.waitpid(  os.walk(     os.write( 

python中使用tab補全