Re: 2 different versions of python compiling files.
The original .py will always be there but you know what, multiple python versions from different computers do access that one library at the same time. Anyone know a possible solution ? What about subversion or mercurial and separate copies of your library for each Python version? -- Ivan -- http://mail.python.org/mailman/listinfo/python-list
2 different versions of python compiling files.
I am trying to upgrade from python 2.3 to 2.4 but not all machines can be upgraded. Can you guys tell me if this scenario is possible. 1. Any machine that uses .py files that use libraries that require 2.4 will have 2.4 on it. 2. rest of the machines will have 2.3 now there is a shared drive. lets say i write a new library called testlib.py and put it on the shared drive .. when a script uses it from a 2.4 based machine, it will generate a testlib.pyc and leave it on the shared drive. going forward that .pyc is used until the original lib is changed. now lets say a 2.3 based machine is trying to use that lib. it will try to use that pyc file which was compiled by py2.4. will it work or crash ? not sure if i did a good job on explaining my scenario. -- http://mail.python.org/mailman/listinfo/python-list
Re: 2 different versions of python compiling files.
TkNeo wrote: I am trying to upgrade from python 2.3 to 2.4 but not all machines can be upgraded. Can you guys tell me if this scenario is possible. 1. Any machine that uses .py files that use libraries that require 2.4 will have 2.4 on it. 2. rest of the machines will have 2.3 now there is a shared drive. lets say i write a new library called testlib.py and put it on the shared drive .. when a script uses it from a 2.4 based machine, it will generate a testlib.pyc and leave it on the shared drive. going forward that .pyc is used until the original lib is changed. now lets say a 2.3 based machine is trying to use that lib. it will try to use that pyc file which was compiled by py2.4. will it work or crash ? It should work, as long as the original .py file is still there. Each Python version will check for a .pyc file *corresponding to that version* (e.g. Python 2.4 will look for a .pyc file compiled with 2.4), and create one if it doesn't exist, overwriting any existing .pyc file in the process. If the original .py file is *not* there, it will most likely not work. If you try to import a .pyc file with the wrong version number, you get something like this: import foo Traceback (most recent call last): File stdin, line 1, in ? ImportError: Bad magic number in foo.pyc I'm not sure what would happen if multiple Pythons try to write a .pyc file at the same time, though... -- Hans Nowak (zephyrfalcon at gmail dot org) http://4.flowsnake.org/ -- http://mail.python.org/mailman/listinfo/python-list
Re: 2 different versions of python compiling files.
On May 22, 2:44 pm, Hans Nowak [EMAIL PROTECTED] wrote: TkNeo wrote: I am trying to upgrade from python 2.3 to 2.4 but not all machines can be upgraded. Can you guys tell me if this scenario is possible. 1. Any machine that uses .py files that use libraries that require 2.4 will have 2.4 on it. 2. rest of the machines will have 2.3 now there is a shared drive. lets say i write a new library called testlib.py and put it on the shared drive .. when a script uses it from a 2.4 based machine, it will generate a testlib.pyc and leave it on the shared drive. going forward that .pyc is used until the original lib is changed. now lets say a 2.3 based machine is trying to use that lib. it will try to use that pyc file which was compiled by py2.4. will it work or crash ? It should work, as long as the original .py file is still there. Each Python version will check for a .pyc file *corresponding to that version* (e.g. Python 2.4 will look for a .pyc file compiled with 2.4), and create one if it doesn't exist, overwriting any existing .pyc file in the process. If the original .py file is *not* there, it will most likely not work. If you try to import a .pyc file with the wrong version number, you get something like this: import foo Traceback (most recent call last): File stdin, line 1, in ? ImportError: Bad magic number in foo.pyc I'm not sure what would happen if multiple Pythons try to write a .pyc file at the same time, though... -- Hans Nowak (zephyrfalcon at gmail dot org)http://4.flowsnake.org/ The original .py will always be there but you know what, multiple python versions from different computers do access that one library at the same time. Anyone know a possible solution ? -- http://mail.python.org/mailman/listinfo/python-list
Re: 2 different versions of python compiling files.
On May 22, 3:56 pm, TkNeo [EMAIL PROTECTED] wrote: On May 22, 2:44 pm, Hans Nowak [EMAIL PROTECTED] wrote: TkNeo wrote: I am trying to upgrade from python 2.3 to 2.4 but not all machines can be upgraded. Can you guys tell me if this scenario is possible. 1. Any machine that uses .py files that use libraries that require 2.4 will have 2.4 on it. 2. rest of the machines will have 2.3 now there is a shared drive. lets say i write a new library called testlib.py and put it on the shared drive .. when a script uses it from a 2.4 based machine, it will generate a testlib.pyc and leave it on the shared drive. going forward that .pyc is used until the original lib is changed. now lets say a 2.3 based machine is trying to use that lib. it will try to use that pyc file which was compiled by py2.4. will it work or crash ? It should work, as long as the original .py file is still there. Each Python version will check for a .pyc file *corresponding to that version* (e.g. Python 2.4 will look for a .pyc file compiled with 2.4), and create one if it doesn't exist, overwriting any existing .pyc file in the process. If the original .py file is *not* there, it will most likely not work. If you try to import a .pyc file with the wrong version number, you get something like this: import foo Traceback (most recent call last): File stdin, line 1, in ? ImportError: Bad magic number in foo.pyc I'm not sure what would happen if multiple Pythons try to write a .pyc file at the same time, though... -- Hans Nowak (zephyrfalcon at gmail dot org)http://4.flowsnake.org/ The original .py will always be there but you know what, multiple python versions from different computers do access that one library at the same time. Anyone know a possible solution ? What error message are you getting? -- http://mail.python.org/mailman/listinfo/python-list
