[Jython-bugs] [ jython-Bugs-542389 ] "cannot import name" and other problems

[<no...@so...>]

Bugs item #542389, was opened at 2002-04-11 11:09
You can respond by visiting: 
http://sourceforge.net/tracker/?func=detail&atid=112867&aid=542389&group_id=12867

Category: Jythonc compiler
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Juu (juu)
Assigned to: Nobody/Anonymous (nobody)
Summary: "cannot import name" and other problems

Initial Comment:
Here's my story - it's a long one, but I'm running 
into a lot of problems.

I have a 80-module application, written in Jython. 
Some of the modules contain classes, while some are 
just a collection of methods.

It works fine in the interpreter, but when compiled, 
it misbehaves.

a) JythonC wouldn't compile from inner 
packages/directories correctly, just from root. As a 
workaround, I moved my main executable to root.

b) I had some "code" and "sys" includes and it 
wouldn't properly include those modules even with 
--deep or --all. 

I placed "import code" and etc. in my main executable 
(compile root) and it started to work, but now 
complained about other includes:

Java Traceback:

        at org.python.core.Py.ImportError(Py.java:180)
        at org.python.core.imp.importFromAs
(imp.java:593)
        at TR$_PyInner.main$1(TR.java:36)
        at TR$_PyInner.call_function(TR.java:28)
        at org.python.core.PyTableCode.call
(PyTableCode.java:198)
        at org.python.core.PyCode.call(PyCode.java:13)
        at org.python.core.imp.createFromCode
(imp.java:165)
        at org.python.core.Py.runMain(Py.java:818)
        at TR.main(TR.java:54)
Traceback (innermost last):
  File "C:\python\TR.py", line 0, in main
ImportError: cannot import name Log

c) I finally got it to work by including around 20 
includes in my main file.
I also made sure that modules in directory "m" never 
do "from m.SomeClass import SomeClass", but 
always "from SomeClass import SomeClass". This seemed
to help with all the "missing module" problems, but 
not with all "cannot import name" problems.

d) For example, I cannot use my other compiled classes 
directly:

C:\python>run_custom_from_jar.bat juudb.DbResultSet

C:\python>java -
Dpython.path=C:\programming\jython\lib -c
p 
C:\programming\jython\jython.jar;tr.jar;C:\programming\
java\lib\interclien
t.jar juudb.DbResultSet
Java Traceback:

        at org.python.core.Py.ImportError(Py.java:180)
        at org.python.core.imp.importFromAs
(imp.java:593)
        at juudb.DbResultSet$_PyInner.main$9
(DbResultSet.java:200)
        at juudb.DbResultSet$_PyInner.call_function
(DbResultSet.java:64)
        at org.python.core.PyTableCode.call
(PyTableCode.java:198)
        at org.python.core.PyCode.call(PyCode.java:13)
        at org.python.core.imp.createFromCode
(imp.java:165)
        at org.python.core.Py.runMain(Py.java:818)
        at juudb.DbResultSet.main(DbResultSet.java:217)
Traceback (innermost last):
  File "C:\python\juudb\DbResultSet.py", line 0, in 
main
ImportError: cannot import name LowerDict

-------
from java.lang import StringBuffer
from juulib.LowerDict import LowerDict
from juulib import Log
from javax.xml.parsers import DocumentBuilderFactory

class DbResultSet:
	... more code here ...
-------

On the other hand, the class it complains about can be 
used just fine:

C:\python>run_custom_from_jar.bat juulib.LowerDict

C:\python>java -
Dpython.path=C:\programming\jython\lib -cp 
C:\programming\jython\jython.jar;tr.jar;C:\programming\
java\lib\interclient.jar juulib.LowerDict

--------------

class LowerDict:
	__vdict = None
	__vdict_name = locals().keys()[0]

        def __init__(self, initData = {}):
            self.__dict__[self.__vdict_name] = {}
	    for i in initData.keys():
		self[i] = initData[i]

        def __getitem__(self, key):
            return self.__vdict[self.convert(key)]

        def __setitem__(self, key, value):
            self.__vdict[self.convert(key)] = value

        def __delitem__(self, key):
            del self.__vdict[self.convert(key)]

       	def __setattr__(self, name, value):
	    self.__vdict.name = value

	def __getattr__(self, name):
#	    print "returning", name
	    return getattr(self.__vdict, name)

	def __repr__(self):
	    return repr(self.__vdict)

	def convert(self, what):
	    if isinstance(what, type("")):
		return what.lower()

	    return what

	def has_key(self, which):
	    return self.__vdict.has_key(self.convert
(which))

------------

e) I tried to recreate these problems on a smaller 
scale.

I have included the relevant files and have recreated 
2 problems for which I see workarounds - the "only 
compile root classes" (point a) and "misses a 
module import" (partial points b and c).

I haven't recreated that "cannot import name" problem 
on a smaller scale, but perhaps my description helps 
anyway. I'm even starting to think that perhaps 
there's some limit to the depth or width of imports 
that I'm running into or something.

Please let me know if there is anything else I can do 
to help replicate this.

Perhaps I'm simply doing something wrong?


----------------------------------------------------------------------

You can respond by visiting: 
http://sourceforge.net/tracker/?func=detail&atid=112867&aid=542389&group_id=12867