技术日志_3 python 2.6 on Debian

Got the following msg while trying to build python2.6 on Debian (It drives me crazy that Debian still doesn’t provide python2.6, though python3.0 has long been available):

Failed to find the necessary bits to build these modules:

_bsddb             _hashlib           _sqlite3

_ssl               _tkinter           bsddb185

bz2                dbm                gdbm

sunaudiodev        zlib

To find the necessary bits, look in setup.py in detect_modules() for the module's name.

Googled it and seems we can just ignore it. So I typed “make install”. Yes, it worked for now. But we are still using python2.5 by just type “python -V” because the default installation place for python2.6 is “/usr/local/” not “/usr”, so we need type “sudo ln -f /usr/local/bin/python /usr/bin/python” to make “/usr/bin/python” hard-linked to python2.6

The first time I have to down-grade a package, from libstdc++6 to libstdc++5. This command “sudo aptitude install libstdc++5” doesn’t work:

 

Setting up python-pkg-resources (0.6c8-4) ...

Traceback (most recent call last):

  File "/usr/bin/pycentral", line 1891, in

    main()

  File "/usr/bin/pycentral", line 1885, in main

    rv = action.run(global_options)

  File "/usr/bin/pycentral", line 1239, in run

    runtimes = get_installed_runtimes()

  File "/usr/bin/pycentral", line 210, in get_installed_runtimes

    default_version = pyversions.default_version(version_only=True)

  File "/usr/share/pycentral-data/pyversions.py", line 163, in default_version

    raise ValueError, "/usr/bin/python does not match the python default version. It must be reset to point to %s" % debian_default

ValueError: /usr/bin/python does not match the python default version. It must be reset to point to python2.5

 

Apparently Debian doesn’t support python2.6 by default. What if I manually “sudo vim /usr/share/python/debian_defaults” and change the default-version? It works!