On 8/5/2010 6:47 PM, Philip Semanchuk wrote:
On Aug 5, 2010, at 8:55 PM, W. eWatson wrote:
It's been awhile since I've used python, and I recall there is a way
to find the version number from the IDLE command line prompt. dir,
help, __version.__?
Hi Wayne,
FYI it's got nothing to do with IDLE, it's just a question of whether or
not the module in question exposes any kind of a version attribute.
There's no standard, unfortunately. The most popular convention seems to
be via an attribute called __version__, but I've also seen __VERSION__,
VERSION, and version.
Here's some code that I wrote that you might find useful. It's from a
setup.py and it checks a list of modules on which our project depends to
see if (a) they're installed and (b) if the version installed is
adequate. In the snippet below, dependencies is a list of custom classes
that represent modules we need (e.g. numpy).
# Try each module
for dependency in dependencies:
try:
__import__(dependency.name)
except ImportError:
# Uh oh!
dependency.installed = None
else:
# The module loaded OK. Get a handle to it and try to extract
# version info.
# Many Python modules follow the convention of providing their
# version as a string in a __version__ attribute.
module = sys.modules[dependency.name]
# This is what I default to.
dependency.installed = "[version unknown]"
for attribute_name in ("__version__", "__VERSION__", "VERSION",
"version"):
if hasattr(module, attribute_name):
dependency.installed = getattr(module, attribute_name)
break
Hope this helps a little,
Philip
Thanks. I'll look into it.
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