Hello
I am new to python. I have got two version of SQLAlchemy, 0.4.0 and
5.5.
Some of my old script built in 0.4.0, and I do not want to change the
script.
Is that any way I can define in the script to use SQLAlchemy 0.3.11
for my old script and 5.5 for my new script?
I think you can use pkgresources to determine which version of
sqlalchemy to be imported. but it is not working, please see my code
below:
In [23]: from pkg_resources import require
In [24]: require('sqlalchemy == 0.4.0')
Out[24]: [sqlalchemy 0.4.0 (c:\pythonxy\python26\lib\site-packages
\sqlalchemy-0.4.0-py2.6.egg)]
In [25]: import sqlalchemy
In [26]: sqlal
sqlalchemy sqlalchemy-0.4.0-py2.6.egg sqlalchemy-0.5.6-py2.6.egg
In [26]: sqlalchemy.__version__
Out[26]: '0.4.0'
That is file, but when i try to load version 5.6. It said got version
conflict
In [28]: require('sqlalchemy == 0.5.6')
---------------------------------------------------------------------------
VersionConflict Traceback (most recent call last)
C:\Pythonxy\Python26\Lib\site-packages\<ipython console> in <module>()
C:\Pythonxy\Python26\Lib\site-packages\pkg_resources.pyc in require
(self, *requirements)
624 """
625
--> 626 needed = self.resolve(parse_requirements(requirements))
627
628 for dist in needed:
C:\Pythonxy\Python26\Lib\site-packages\pkg_resources.pyc in resolve
(self, requirements, env, install
er)
526 if dist not in req:
527 # Oops, the "best" so far conflicts with a dependency
--> 528 raise VersionConflict(dist,req) # XXX put more info here
529 requirements.extend(dist.requires(req.extras)[::-1])
530 processed[req] = True
VersionConflict: (sqlalchemy 0.4.0 (c:\pythonxy\python26\lib\site-
packages\sqlalchemy-0.4.0-py2.6.egg), Requirement.parse
('sqlalchemy==0.5.6'))
any help will be more than welcome. :D
Ning
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