[Python-Dev] Draft: PEP for imports (original) (raw)

Chris Reedy chrisandannreedy at comcast.net
Fri Jan 30 18:00:14 EST 2004

Armin Rigo wrote:

import neatTricks in "/home/guido/lib/python" # no package import package.module in "/home/guido/lib/python" # package import foo in "." # relative import from neatTricks in "../cmds" import a, b, c s=os.path.join("some", "where"); import foo in s # expression path

where the semantics would be to search sys.path if and only if no 'in' clause is specified. ('in' doesn't sound quite right...) Armin -

Thinking about the semantics of the above, including corner cases, I find myself wanting to make the semantics of:

in ""

to be equivalent to:

sys.path.insert(0, "") del sys.path[0] # assuming the import doesn't modify sys.path

That doesn't seem to be quite equivalent to what you've proposed. On the other hand, that seems to provide at least semi-reasonable answers to questions about what happens to sys.modules, what happens if sys.modules['package'] is defined when importing package.module, what's the correct search path when a module being imported does an import, etc.

Having said that, that makes me feel negatively about the proposal, since you could do it yourself directly.

Chris

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