# Getting started tutorial python problems **URL:** \ **Category:** Support\ **Tags:** python\ **Created:** [January 9, 2025, 9:55pm UTC](https://www.rubin.community/t/getting-started-tutorial-python-problems/9693 "2025-01-09T21:55:36Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![VenIl](https://avatars.discourse-cdn.com/v4/letter/v/ea666f/32.png) [@VenIl](https://www.rubin.community/u/VenIl)\ **Post date:** [January 9, 2025, 9:55pm UTC](https://www.rubin.community/t/getting-started-tutorial-python-problems/9693/1 "2025-01-09T21:55:37Z")
Hello, I’m trying to run Getting started tutorial part 3: displaying exposures and source tables output by single frame processing. While running one of python commands I get error message : AttributeError: module ‘lsst’ has no attribute ‘obs’. What can be done about this and how to update lsst python packges? Thank you ---
**Author:** ![timj](https://sea2.discourse-cdn.com/flex002/user_avatar/www.rubin.community/timj/32/10_2.png) [@timj](https://www.rubin.community/u/timj)\ **Post date:** [January 9, 2025, 10:09pm UTC](https://www.rubin.community/t/getting-started-tutorial-python-problems/9693/2 "2025-01-09T22:09:29Z")
This implies that you’ve missed a call to `setup` somewhere since that is what will enable the python `lsst.x` packages. There should be a `setup lsst_distrib` somewhere. [Getting started tutorial part 1: setting up the Butler data repository — LSST Science Pipelines](https://pipelines.lsst.io/getting-started/data-setup.html#install-the-lsst-science-pipelines) links to [Setting up installed LSST Science Pipelines — LSST Science Pipelines](https://pipelines.lsst.io/install/setup.html) I’m not sure how you got through step 2 without the python code set up. ---
**Author:** ![sgreenstreet](https://sea2.discourse-cdn.com/flex002/user_avatar/www.rubin.community/sgreenstreet/32/1975_2.png) [@sgreenstreet](https://www.rubin.community/u/sgreenstreet)\ **Post date:** [January 10, 2025, 4:03pm UTC](https://www.rubin.community/t/getting-started-tutorial-python-problems/9693/3 "2025-01-10T16:03:53Z")
Hi @VenIl - I just wanted to check whether running `setup lsst_distrib` as suggeseted by @timj fixed your issue? ---
**Author:** ![VenIl](https://avatars.discourse-cdn.com/v4/letter/v/ea666f/32.png) [@VenIl](https://www.rubin.community/u/VenIl)\ **Post date:** [January 10, 2025, 5:25pm UTC](https://www.rubin.community/t/getting-started-tutorial-python-problems/9693/4 "2025-01-10T17:25:07Z")
Hi @sgreenstreet , it still doesn’t work with same error message. ---
**Author:** ![VenIl](https://avatars.discourse-cdn.com/v4/letter/v/ea666f/32.png) [@VenIl](https://www.rubin.community/u/VenIl)\ **Post date:** [January 10, 2025, 5:29pm UTC](https://www.rubin.community/t/getting-started-tutorial-python-problems/9693/5 "2025-01-10T17:29:23Z")
## Here is the full error message if it helps: AttributeError Traceback (most recent call last) File ~/lsstsw/miniconda/envs/lsst-scipipe-9.0.0/lib/python3.11/site-packages/lsst/utils/doImport.py:52, in doImport..tryImport(module, fromlist, previousError) 51 try: —\> 52 pytype = getattr(pytype, f) 53 except AttributeError as e: AttributeError: module ‘lsst’ has no attribute ‘obs’ The above exception was the direct cause of the following exception: ImportError Traceback (most recent call last) Cell In[3], line 2 1 import os ----\> 2 calexp = butler.get(‘calexp’, visit=23718, detector=41) File ~/lsstsw/miniconda/envs/lsst-scipipe-9.0.0/lib/python3.11/site-packages/lsst/daf/butler/direct\_butler/\_direct\_butler.py:1177, in DirectButler.get(self, datasetRefOrType, dataId, parameters, collections, storageClass, timespan, \*\*kwargs) 1168 \_LOG.debug(“Butler get: %s, dataId=%s, parameters=%s”, datasetRefOrType, dataId, parameters) 1169 ref = self.\_findDatasetRef( 1170 datasetRefOrType, 1171 dataId, (…) 1175 \*\*kwargs, 1176 ) → 1177 return self.\_datastore.get(ref, parameters=parameters, storageClass=storageClass) File ~/lsstsw/miniconda/envs/lsst-scipipe-9.0.0/lib/python3.11/site-packages/lsst/daf/butler/datastores/fileDatastore.py:2288, in FileDatastore.get(self, ref, parameters, storageClass) 2285 if storageClass is not None: 2286 ref = ref.overrideStorageClass(storageClass) → 2288 allGetInfo = self.\_prepare\_for\_direct\_get(ref, parameters) 2289 return get\_dataset\_as\_python\_object\_from\_get\_info( 2290 allGetInfo, ref=ref, parameters=parameters, cache\_manager=self.cacheManager 2291 ) File ~/lsstsw/miniconda/envs/lsst-scipipe-9.0.0/lib/python3.11/site-packages/lsst/daf/butler/datastores/fileDatastore.py:826, in FileDatastore.\_prepare\_for\_direct\_get(self, ref, parameters) 823 if not fileLocations: 824 raise FileNotFoundError(f"None of the component files for dataset {ref} exist.") → 826 return generate\_datastore\_get\_information( 827 fileLocations, 828 readStorageClass=refStorageClass, 829 ref=ref, 830 parameters=parameters, 831 ) File ~/lsstsw/miniconda/envs/lsst-scipipe-9.0.0/lib/python3.11/site-packages/lsst/daf/butler/datastores/file\_datastore/get.py:134, in generate\_datastore\_get\_information(fileLocations, ref, parameters, readStorageClass) 131 if disassembled and storedFileInfo.component != refComponent: 132 thisReadStorageClass = writeStorageClass → 134 formatter = get\_instance\_of( 135 storedFileInfo.formatter, 136 FileDescriptor( 137 location, 138 readStorageClass=thisReadStorageClass, 139 storageClass=writeStorageClass, 140 parameters=parameters, 141 component=storedFileInfo.component, 142 ), 143 dataId=ref.dataId, 144 ref=ref, 145 ) 147 formatterParams, notFormatterParams = formatter.segregate\_parameters() 149 # Of the remaining parameters, extract the ones supported by 150 # this StorageClass (for components not all will be handled) File ~/lsstsw/miniconda/envs/lsst-scipipe-9.0.0/lib/python3.11/site-packages/lsst/utils/introspection.py:153, in get\_instance\_of(typeOrName, \*args, \*\*kwargs) 128 def get\_instance\_of(typeOrName: type | str, \*args: Any, \*\*kwargs: Any) → Any: 129 “”“Given the type name or a type, instantiate an object of that type. 130 131 If a type name is given, an attempt will be made to import the type. (…) 151 Raised if a module is imported rather than a type. 152 “”” → 153 cls = get\_class\_of(typeOrName) 154 return cls(\*args, \*\*kwargs) File ~/lsstsw/miniconda/envs/lsst-scipipe-9.0.0/lib/python3.11/site-packages/lsst/utils/introspection.py:120, in get\_class\_of(typeOrName) 95 “”“Given the type name or a type, return the python type. 96 97 If a type name is given, an attempt will be made to import the type. (…) 117 Raised if a module is imported rather than a type. 118 “”” 119 if isinstance(typeOrName, str): → 120 cls = doImportType(typeOrName) 121 else: 122 if isinstance(typeOrName, types.ModuleType): File ~/lsstsw/miniconda/envs/lsst-scipipe-9.0.0/lib/python3.11/site-packages/lsst/utils/doImport.py:114, in doImportType(importable) 90 def doImportType(importable: str) → type: 91 “”“Import a python type given an importable string and return it. 92 93 Parameters (…) 112 item could not be retrieved from the imported module. 113 “”” → 114 imported = doImport(importable) 115 if isinstance(imported, types.ModuleType): 116 raise TypeError(f"Import of {importable} returned a module and not a type.") File ~/lsstsw/miniconda/envs/lsst-scipipe-9.0.0/lib/python3.11/site-packages/lsst/utils/doImport.py:69, in doImport(importable) 67 while moduleComponents: 68 try: —\> 69 pytype = tryImport(“.”.join(moduleComponents), infileComponents, previousError) 70 if not infileComponents and hasattr(pytype, moduleComponents[-1]): 71 # This module has an attribute with the same name as the 72 # module itself (like doImport.doImport, actually!). 73 # If that attribute was lifted to the package, we should 74 # return the attribute, not the module. 75 try: File ~/lsstsw/miniconda/envs/lsst-scipipe-9.0.0/lib/python3.11/site-packages/lsst/utils/doImport.py:55, in doImport..tryImport(module, fromlist, previousError) 53 except AttributeError as e: 54 extra = f"({previousError})" if previousError is not None else “” —\> 55 raise ImportError( 56 f"Could not get attribute ‘{f}’ from ‘{module}’ when importing ‘{importable}’ {extra}" 57 ) from e 58 return pytype ImportError: Could not get attribute ‘obs’ from ‘lsst’ when importing ‘lsst.obs.base.formatters.fitsExposure.FitsExposureFormatter’ (No module named ‘lsst.obs’) ---
**Author:** ![timj](https://sea2.discourse-cdn.com/flex002/user_avatar/www.rubin.community/timj/32/10_2.png) [@timj](https://www.rubin.community/u/timj)\ **Post date:** [January 10, 2025, 5:47pm UTC](https://www.rubin.community/t/getting-started-tutorial-python-problems/9693/6 "2025-01-10T17:47:32Z")
> [@VenIl](#): > > ~/lsstsw/miniconda/envs/lsst-scipipe-9.0.0/lib/python3.11/site-packages/lsst/daf/butler/datastores/file\_datastore/get.py How did you install the LSST science pipelines? This looks like a pip install of daf\_butler not the eups install. ---
**Author:** ![VenIl](https://avatars.discourse-cdn.com/v4/letter/v/ea666f/32.png) [@VenIl](https://www.rubin.community/u/VenIl)\ **Post date:** [January 10, 2025, 5:53pm UTC](https://www.rubin.community/t/getting-started-tutorial-python-problems/9693/7 "2025-01-10T17:53:55Z")
I Installed it with lsstsw and lsst-build. ---
**Author:** ![VenIl](https://avatars.discourse-cdn.com/v4/letter/v/ea666f/32.png) [@VenIl](https://www.rubin.community/u/VenIl)\ **Post date:** [January 10, 2025, 6:10pm UTC](https://www.rubin.community/t/getting-started-tutorial-python-problems/9693/8 "2025-01-10T18:10:49Z")
I have an Ubuntu laptop. ---
**Author:** ![timj](https://sea2.discourse-cdn.com/flex002/user_avatar/www.rubin.community/timj/32/10_2.png) [@timj](https://www.rubin.community/u/timj)\ **Post date:** [January 10, 2025, 6:37pm UTC](https://www.rubin.community/t/getting-started-tutorial-python-problems/9693/9 "2025-01-10T18:37:49Z")
> [@VenIl](#): > > I Installed it with lsstsw and lsst-build. Except somehow you have also managed to pip install the Rubin middleware packages. That does not happen when you run `rebuild lsst_distrib`. We expect most tutorial users to follow the installation instructions of installing with `lsstinstall` since `rebuild` will give you the cutting edge `main` version of every package. What does `eups list lsst_distrib` report? ---
**Author:** ![VenIl](https://avatars.discourse-cdn.com/v4/letter/v/ea666f/32.png) [@VenIl](https://www.rubin.community/u/VenIl)\ **Post date:** [January 10, 2025, 6:42pm UTC](https://www.rubin.community/t/getting-started-tutorial-python-problems/9693/11 "2025-01-10T18:42:32Z")
output : gc7ba34d93f+8892a0c6f9 b7407 current setup ---
**Author:** ![timj](https://sea2.discourse-cdn.com/flex002/user_avatar/www.rubin.community/timj/32/10_2.png) [@timj](https://www.rubin.community/u/timj)\ **Post date:** [January 10, 2025, 6:48pm UTC](https://www.rubin.community/t/getting-started-tutorial-python-problems/9693/12 "2025-01-10T18:48:11Z")
Ok. So lsst\_distrib is set up but the pip installed packages are somehow messing things up. What about: ```auto $ eups list obs_base $ echo $OBS_BASE_DIR $ ls $OBS_BASE_DIR/python ``` ---
**Author:** ![timj](https://sea2.discourse-cdn.com/flex002/user_avatar/www.rubin.community/timj/32/10_2.png) [@timj](https://www.rubin.community/u/timj)\ **Post date:** [January 10, 2025, 8:05pm UTC](https://www.rubin.community/t/getting-started-tutorial-python-problems/9693/13 "2025-01-10T20:05:30Z")
Oh, also please report your `$PYTHONPATH` value. ---
**Author:** ![VenIl](https://avatars.discourse-cdn.com/v4/letter/v/ea666f/32.png) [@VenIl](https://www.rubin.community/u/VenIl)\ **Post date:** [January 10, 2025, 8:10pm UTC](https://www.rubin.community/t/getting-started-tutorial-python-problems/9693/14 "2025-01-10T20:10:32Z")
g5c8c310e76+15eaa6c88b b7407 current setup /home/venil360/lsstsw/stack/lsst-scipipe-9.0.0/Linux64/obs\_base/g5c8c310e76+15eaa6c88b lsst ---
**Author:** ![VenIl](https://avatars.discourse-cdn.com/v4/letter/v/ea666f/32.png) [@VenIl](https://www.rubin.community/u/VenIl)\ **Post date:** [January 10, 2025, 8:16pm UTC](https://www.rubin.community/t/getting-started-tutorial-python-problems/9693/15 "2025-01-10T20:16:40Z")
[’/home/venil360/lsstsw/miniconda/envs/lsst-scipipe-9.0.0/eups/python’, ‘/home/venil360/lsstsw/miniconda/envs/lsst-scipipe-9.0.0/lib/python311.zip’, ‘/home/venil360/lsstsw/miniconda/envs/lsst-scipipe-9.0.0/lib/python3.11’, ‘/home/venil360/lsstsw/miniconda/envs/lsst-scipipe-9.0.0/lib/python3.11/lib-dynload’, ‘’, ‘/home/venil360/lsstsw/miniconda/envs/lsst-scipipe-9.0.0/lib/python3.11/site-packages’] ---
**Author:** ![timj](https://sea2.discourse-cdn.com/flex002/user_avatar/www.rubin.community/timj/32/10_2.png) [@timj](https://www.rubin.community/u/timj)\ **Post date:** [January 10, 2025, 8:30pm UTC](https://www.rubin.community/t/getting-started-tutorial-python-problems/9693/16 "2025-01-10T20:30:30Z")
That’s the problem. `setup lsst_distrib` didn’t set any of the PYTHONPATH environment variables. There is meant to be one var per eups package. I still can’t explain how you installed Rubin pip packages. To confirm you installed it as: ```auto $ ./bin/deploy $ . bin/envconfig $ rebuild lsst_distrib $ setup -t bNNNN lsst_distrib ``` and nothing else? Can you start a new shell, source the bin/envconfig and try the setup again to see if you get the PYTHONPATH variable set properly? ---
**Author:** ![VenIl](https://avatars.discourse-cdn.com/v4/letter/v/ea666f/32.png) [@VenIl](https://www.rubin.community/u/VenIl)\ **Post date:** [January 11, 2025, 4:31pm UTC](https://www.rubin.community/t/getting-started-tutorial-python-problems/9693/17 "2025-01-11T16:31:27Z")
Did what you told. I get : /home/venil360/lsstsw/miniconda/envs/lsst-scipipe-9.0.0/eups/python /home/venil360/lsstsw/miniconda/envs/lsst-scipipe-9.0.0/lib/python311.zip /home/venil360/lsstsw/miniconda/envs/lsst-scipipe-9.0.0/lib/python3.11 /home/venil360/lsstsw/miniconda/envs/lsst-scipipe-9.0.0/lib/python3.11/lib-dynload /home/venil360/lsstsw/miniconda/envs/lsst-scipipe-9.0.0/lib/python3.11/site-packages ---
**Author:** ![VenIl](https://avatars.discourse-cdn.com/v4/letter/v/ea666f/32.png) [@VenIl](https://www.rubin.community/u/VenIl)\ **Post date:** [January 11, 2025, 4:33pm UTC](https://www.rubin.community/t/getting-started-tutorial-python-problems/9693/18 "2025-01-11T16:33:12Z")
Did what you told. I get now : /home/venil360/lsstsw/miniconda/envs/lsst-scipipe-9.0.0/eups/python /home/venil360/lsstsw/miniconda/envs/lsst-scipipe-9.0.0/lib/python311.zip /home/venil360/lsstsw/miniconda/envs/lsst-scipipe-9.0.0/lib/python3.11 /home/venil360/lsstsw/miniconda/envs/lsst-scipipe-9.0.0/lib/python3.11/lib-dynload /home/venil360/lsstsw/miniconda/envs/lsst-scipipe-9.0.0/lib/python3.11/site-packages ---
**Author:** ![timj](https://sea2.discourse-cdn.com/flex002/user_avatar/www.rubin.community/timj/32/10_2.png) [@timj](https://www.rubin.community/u/timj)\ **Post date:** [January 13, 2025, 3:40pm UTC](https://www.rubin.community/t/getting-started-tutorial-python-problems/9693/19 "2025-01-13T15:40:37Z")
That’s very confusing because somehow the `setup` call is not setting `PYTHONPATH` at all. This is seemingly impossible. Did you understand how you installed the middleware packages from PyPI? Does `rebuild lsst_distrib` work for you (since you are using `lsstsw`)? Can you please try using `lsstinstall` as documented [here](https://pipelines.lsst.io/install/lsstinstall.html) ? ---
**Author:** ![timj](https://sea2.discourse-cdn.com/flex002/user_avatar/www.rubin.community/timj/32/10_2.png) [@timj](https://www.rubin.community/u/timj)\ **Post date:** [January 15, 2025, 9:23pm UTC](https://www.rubin.community/t/getting-started-tutorial-python-problems/9693/20 "2025-01-15T21:23:35Z")
Given > [@Getting started tutorial part 4 problems](http://www.rubin.community/t/getting-started-tutorial-part-4-problems/9715): > > Hello, I’m trying to run FGCM part of Getting started tutorial part 4 and getting error message:sst.daf.butler.cli.utils ERROR: Caught an exception, details are in traceback: Traceback (most recent call last): File "/home/venil/lsstsw/stack/lsst-scipipe-9.0.0/Linux64/daf\_butler/gc03a7ffb89+49d5bde2b1/python/lsst/daf/butler/\_butler\_config.py", line 138, in \_\_init\_\_ butlerConfig = Config(other) ^^^^^^^^^^^^^ File "/home/venil/lsstsw/stack/lsst-scipipe-9.0.0/Linux64/daf… can I assume that you have resolved this topic? ---
**Author:** ![VenIl](https://avatars.discourse-cdn.com/v4/letter/v/ea666f/32.png) [@VenIl](https://www.rubin.community/u/VenIl)\ **Post date:** [January 15, 2025, 9:26pm UTC](https://www.rubin.community/t/getting-started-tutorial-python-problems/9693/21 "2025-01-15T21:26:12Z")
Yes, I reinstalled the whole system. Thank you.