Unable to install uszipcode

djl

I have been trying to install the uszipcode package which is available on PyPI. It looks like a pure python package, and seems to install without problems with pip. Nonetheless, after trying from uszipcode import SearchEngine I get the error message "ImportError: cannot import name 'SearchEngine'" despite the fact that the class SearchEngine is clearly visible in the site package module. I feel like I'm missing something basic about installing and using python modules. Can anyone explain where I've gone wrong?

JonB

You should have site-packages-3/uszipcode/search.py

To be clear, are you saying

import uszipcode
uszipcode.SesrchEngine

Works, but the from import doesn't?

djl

import uszipcode doesn't produce an error message. Referring to it from the command line produces: ```

uszipcode
<module 'uszipcode' from '/private/var/mobile/Containers/Shared/AppGroup/33F42B57-E4B9-4767-9D62-5D195D377333/Pythonista3/Documents/site-packages-3/uszipcode/init.py'>```

Trying to import the search engine brings this response:

>>> from uszipcode import SearchEngine
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: cannot import name 'SearchEngine'```

JonB

Have you tried

from uszipcode.search import SearchEngine

Or import uszipcode.search?

Also, did sqlalchemy install (is it in site-packages-3)? I noticed that is a dependency, which has some non pure python.

JonB

@djl I noticed that in init, they try/except the real import errors that are occuring:

try:
    from .search import (
        SearchEngine, SimpleZipcode, Zipcode, ZipcodeType, SORT_BY_DIST,
    )
except Exception as e:  # pragma: no cover
    print(e)

So, try
import uszipcode.search

And report back on the exception. My guess is sqlalchemy.

djl

>>> import uszipcode.search
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/private/var/mobile/Containers/Shared/AppGroup/33F42B57-E4B9-4767-9D62-5D195D377333/Pythonista3/Documents/site-packages-3/uszipcode/search.py", line 16, in <module>
    from .db import (
  File "/private/var/mobile/Containers/Shared/AppGroup/33F42B57-E4B9-4767-9D62-5D195D377333/Pythonista3/Documents/site-packages-3/uszipcode/db.py", line 18, in <module>
    from pathlib_mate import Path
ModuleNotFoundError: No module named 'pathlib_mate'

>>> from uszipcode.search import SearchEngine
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/private/var/mobile/Containers/Shared/AppGroup/33F42B57-E4B9-4767-9D62-5D195D377333/Pythonista3/Documents/site-packages-3/uszipcode/search.py", line 16, in <module>
    from .db import (
  File "/private/var/mobile/Containers/Shared/AppGroup/33F42B57-E4B9-4767-9D62-5D195D377333/Pythonista3/Documents/site-packages-3/uszipcode/db.py", line 18, in <module>
    from pathlib_mate import Path
ModuleNotFoundError: No module named 'pathlib_mate'```



SQLAlchemy installed, sort of...
EAB0EA45C0A1/tmp//SQLAlchemy-1.2.17.tar.gz (5670715 bytes)
   5670715  [100.00%]
Extracting archive file ...
Archive extracted.
Running setup file ...
WARNING: Extension modules are skipped: [<__main__.OmniClass object at 0x10d4be940>, <__main__.OmniClass object at 0x10d4be080>, <__main__.OmniClass object at 0x10d4be128>]
Package installed: SQLAlchemy
[~/Documents]$ 

But after that -- same failure to import SearchEngine

And after installing pathlib_mate:

>>> import uszipcode.search
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/private/var/mobile/Containers/Shared/AppGroup/33F42B57-E4B9-4767-9D62-5D195D377333/Pythonista3/Documents/site-packages-3/uszipcode/search.py", line 16, in <module>
    from .db import (
  File "/private/var/mobile/Containers/Shared/AppGroup/33F42B57-E4B9-4767-9D62-5D195D377333/Pythonista3/Documents/site-packages-3/uszipcode/db.py", line 18, in <module>
    from pathlib_mate import Path
ImportError: cannot import name 'Path'

This is not for the faint of heart

JonB

That jerk seems to love hiding exceptions in all his projects ;).

Try
import pathlib_mate.pathlib2

And see what squawks next

djl

@JonB

import pathlib_mate.pathlib2
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/private/var/mobile/Containers/Shared/AppGroup/33F42B57-E4B9-4767-9D62-5D195D377333/Pythonista3/Documents/site-packages-3/pathlib_mate/pathlib2.py", line 1203, in <module>
from .mate_tool_box import ToolBox
File "/private/var/mobile/Containers/Shared/AppGroup/33F42B57-E4B9-4767-9D62-5D195D377333/Pythonista3/Documents/site-packages-3/pathlib_mate/mate_tool_box.py", line 6, in <module>
import autopep8
ModuleNotFoundError: No module named 'autopep8'

So I installed autopep8 and tried again:

import pathlib_mate.pathlib2

No exceptions there. But going back to the beginning, still can't import 'Path'

Traceback (most recent call last):
File "/private/var/mobile/Containers/Shared/AppGroup/33F42B57-E4B9-4767-9D62-5D195D377333/Pythonista3/Documents/zipcode.py", line 4, in <module>
import uszipcode.search
File "/private/var/mobile/Containers/Shared/AppGroup/33F42B57-E4B9-4767-9D62-5D195D377333/Pythonista3/Documents/site-packages-3/uszipcode/search.py", line 16, in <module>
from .db import (
File "/private/var/mobile/Containers/Shared/AppGroup/33F42B57-E4B9-4767-9D62-5D195D377333/Pythonista3/Documents/site-packages-3/uszipcode/db.py", line 18, in <module>
from pathlib_mate import Path
ImportError: cannot import name 'Path'

JonB

How about

from pathlib_mate.pathlib2 import Path

You might need to force quit pythonista and try again. If pathlib2 imported successfully, it should have Path.

djl

@JonB

After rebooting the iPad, that actually worked!! Amazing! Although I notice one of my other well functioning scripts stopped working. Is that because all of the newly installed modules somehow mess up previously working ones?

djl

@JonB
Now everything is hunky-dory. Thanks for your help, Jon. I would have given up long ago.

JonB

Could be... You'd have to look at the tracebacks to see what is failing. Check site-packages-3 and make sure you don't have any modules elsewhere named the same as one of the ones in the top level site-packages-3.

lin

my question is bellow
Cannot import module 'scripts.test': cannot import name 'ExtendedBase' from 'uszipcode.pkg.sqlalchemy_mate'
Why is this

JonB

Can you please post the full traceback?

uszipcode loves to try to import modules, then simply catch the exceptions and pass without error, making debugging it super annoying.

It appears you must have sqlalchemy installed in order to pass that import. Try installing sqlalchemy (see discussion above -- I don't think it will actually succeed, but there are just certain files that are needed to get past this specific error)

lin

I try to install SQLAlchemy, it says I have already installed it

pip3 install SQLAlchemy
Requirement already satisfied: SQLAlchemy in /Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages (1.4.4)
Requirement already satisfied: greenlet!=0.4.17 in /Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages (from SQLAlchemy) (0.4.16)

the full Traceback

cannot import name 'ExtendedBase' from 'uszipcode.pkg.sqlalchemy_mate' (/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/uszipcode/pkg/sqlalchemy_mate/__init__.py)
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/django_extensions/management/commands/runscript.py", line 176, in my_import
    t = importlib.import_module(full_module_path)
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 783, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/Users/lin/eano/scripts/test.py", line 2, in <module>
    from uszipcode import search
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/uszipcode/search.py", line 22, in <module>
    from .model import SimpleZipcode, Zipcode, ZipcodeType
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/uszipcode/model.py", line 15, in <module>
    from .pkg.sqlalchemy_mate import ExtendedBase
ImportError: cannot import name 'ExtendedBase' from 'uszipcode.pkg.sqlalchemy_mate' (/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/uszipcode/pkg/sqlalchemy_mate/__init__.py)
Cannot import module 'scripts.test': cannot import name 'ExtendedBase' from 'uszipcode.pkg.sqlalchemy_mate' (/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/uszipcode/pkg/sqlalchemy_mate/__init__.py).

lin

Do you have MSA Zip code mapping data？

JonB

Ok, the problem is likely one of the imports from extended_declarative_base.
Try each of these in the console, and see which breaks.

from sqlalchemy.orm import sessionmaker
from sqlalchemy.orm.session import Session
from sqlalchemy.engine.base import Engine
from sqlalchemy.exc import IntegrityError
from sqlalchemy.orm.exc import FlushError
from sqlalchemy.inspection import inspect

lin

Can be imported normally

JonB

@lin said:

/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/...

Umm, what device and app are you running this on?
This forum is for the pythonista app on iOS. This looks like you are running Mac or LInux.

As a general suggestion though, you should temporarily edit
your site-packages/uszipcode/pkg/sqlalchemy_mate/init.py, and change the "pass" to "raise". One of the 3 imports in that file are failing, but because he is just hiding the exception, you can't see what fails until model.py doesn't see ExtendedBase.

Also, the place to go may be the uszipcode github:
https://github.com/MacHu-GWU/uszipcode-project/issues/48
Since you are using 1.4.4 of sqlalchemy, looks like you are going to have failures.

One workaround is to use
pip3 install SQLAlchemy==1.3.23

or, you could implement the fixes found here
https://github.com/MacHu-GWU/uszipcode-project/pull/49/commits/73df0278f7232b789efa6621e629f8e50915bbef

lin

@JonB said:

pip3 install SQLAlchemy==1.3.23

It’s amazing. I installed the version you mentioned and it works. thank you very much，otherwise I would give up too