What could cause a python module to be imported twice? -

-

as far understand, python module never imported twice, i.e. code in module gets executed first time imported. subsequent import statements add module scope of import.

i have module called "tiledconvc3d.py" seems imported multiple times though. use pdb print stack @ top of code module.

here end of stack trace first time module executed:

file "<anonymized>/python_modules/theano/theano/gof/cmodule.py", line 328, in refresh   key = cpickle.load(open(key_pkl, 'rb')) file "<anonymized>/ops/tiledconvg3d.py", line 565, in <module>   import tiledconvc3d file "<anonymized>/ops/tiledconvc3d.py", line 18, in <module>   pdb.traceback.print_stack()

it goes on executed several more times. however, complete stack trace second time called not show calls reload, these executions should not occurring:

file "sup_train_conj_grad.py", line 103, in <module>   dataset = config.get_dataset(dataset_node) file "<anonymized>/config.py", line 279, in get_dataset   datasets import newwiskott file "<anonymized>/datasets/newwiskott.py", line 16, in <module>   normalizer_train = video.contrastnormalizer3d(sigma, global_per_frame = false, input_is_5d = true) file "<anonymized>/util/video.py", line 204, in __init__   self.f = theano.function([input],output) file "<anonymized>/python_modules/theano/theano/compile/function.py", line 105, in function   allow_input_downcast=allow_input_downcast) file "<anonymized>/python_modules/theano/theano/compile/pfunc.py", line 270, in pfunc   accept_inplace=accept_inplace, name=name) file "<anonymized>/python_modules/theano/theano/compile/function_module.py", line 1105, in orig_function   fn = maker(inputs, outputs, mode, accept_inplace = accept_inplace).create(defaults) file "/u/goodfeli/python_modules/theano/theano/compile/function_module.py", line 982, in create   _fn, _i, _o = self.linker.make_thunk(input_storage = input_storage_lists) file "<anonymized>/python_modules/theano/theano/gof/link.py", line 321, in make_thunk   output_storage = output_storage)[:3] file "<anonymized>/python_modules/theano/theano/gof/cc.py", line 1178, in make_all   output_storage = node_output_storage) file "<anonymized>/python_modules/theano/theano/gof/cc.py", line 774, in make_thunk   cthunk, in_storage, out_storage, error_storage = self.__compile__(input_storage, output_storage) file "<anonymized>/python_modules/theano/theano/gof/cc.py", line 723, in __compile__   output_storage) file "<anonymized>/python_modules/theano/theano/gof/cc.py", line 1037, in cthunk_factory   module = get_module_cache().module_from_key(key=key, fn=self.compile_cmodule) file "<anonymized>/python_modules/theano/theano/gof/cc.py", line 59, in get_module_cache   return cmodule.get_module_cache(config.compiledir) file "<anonymized>/python_modules/theano/theano/gof/cmodule.py", line 576, in get_module_cache   _module_cache = modulecache(dirname, force_fresh=force_fresh) file "<anonymized>/python_modules/theano/theano/gof/cmodule.py", line 268, in __init__   self.refresh() file "<anonymized>/python_modules/theano/theano/gof/cmodule.py", line 326, in refresh   key = cpickle.load(open(key_pkl, 'rb')) file "<anonymized>/ops/tiledconvv3d.py", line 504, in <module>   import tiledconvg3d file "<anonymized>/ops/tiledconvg3d.py", line 565, in <module>   import tiledconvc3d file "<anonymized>/ops/tiledconvc3d.py", line 22, in <module>   pdb.traceback.print_stack()

moreover, check id of __builtin__.__import__ . @ start of main script, import __builtin__ , print id(__builtin__.__import__) before doing other imports. print id(__builtin__.import__) inside module being imported multiple times, , value of id not change.

are there other mechanisms besides calling reload , overriding __builtin__.__import__ explain module getting loaded multiple times?

a python module can imported twice if module found twice in path. example, project laid out so:

  • src/
    • package1/
      • spam.py
      • eggs.py

suppose pythonpath (sys.path) includes src , src/package1:

pythonpath=/path/to/src:/path/to/src/package1

if that's case, can import same module twice this:

from package1 import spam import spam

and python think different modules. what's going on?

also, per discussion below (for users searching question), way module can imported twice if there exception midway through first import. example, if spam imports eggs, importing eggs results in exception inside module, can imported again.


Comments

Post a Comment

Popular posts from this blog

java - SNMP4J General Variable Binding Error -

-
i trying use snmp4j snmp bulkget. when ever use snmp4j make call returned responseevent error says "general variable binding error" , data returned equal null. to debug: print out, console, exact oid , version number using in snmp4j. use printed out data snmpwalk on command line. valid results. know sending snmp4j correct pdu correct oid, version number, max repititions, etc. i have used snmp4j , code wrote succesffuly monitor other devices years. don't know different time. leaving me stumped. why "general variable binding error?" causes error? ideas debug? can reproduced? if so, first action should using wireshark or microsoft network monitor capture network packets. my guess agent gives generr response, not surprising, http://www.ietf.org/rfc/rfc1157.txt
Read more

windows - Python Service Installation - "Could not find PythonClass entry" -

-
i working on building python service. inducing error, not sure inducing it. ps c:\...> python .\file.py debug debugging service myservice - press ctrl+c stop. error 0xc00000f4 - not find service's pythonclass entry in registry error 1814 - specified resource name cannot found in image file. error 0xc0000080 - not locate module name in python class string (ie, no '.') this error coming pythonservicemessages.mc in pythonwin32. it turns out error result caused exception being thrown , python script dying off.
Read more

Determine if a XmlNode is empty or null in C#? -

-
the following code takes xmlnode data type , populates dataset object xmlnode content. write dataset's content file. public void populatedataset(xmlnode node) { xmlnodereader reader = new xmlnodereader(node); dataset ds = new dataset(); ds.readxml(reader); system.guid guid = system.guid.newguid(); string name = string.format("{0}{1}_{2}.xml", utility.xmloutputpath, utility.xmloutputfilename, guid.tostring()); //need write "node empty" file if xmlnode object empty of null ds.writexml(name, xmlwritemode.ignoreschema); } the problem encountered 1 scenario not write content file. how determine if xmlnode object null or empty? you can check if node parameter null or has innertext or innerxml properties null or empty, when enter method before creating xmlnodereader .
Read more