Module 'mypy_boto3.emr' has no attribute 'Client'

[dvirtz]

executing mypy -c 'from mypy_boto3.emr import Client' produces the error <string>:1: error: Module 'mypy_boto3.emr' has no attribute 'Client'.

It seems that mypy does not support star imports, see python/mypy#4930

This is with Python 3.7.2 and mypy 0.750

[vemel]

Thank you for report. Just checked and looks like it is working for me. Make sure you executed python -m mypy_boto3 to build subpackages imports.

# install `pip install boto3-stubs[emr]`

import boto3
from mypy_boto3.emr import Client


def emr_client_example() -> None:
    # equivalent of `boto3.client('s3')`
    client: Client = boto3.client("emr")
    client.cancel_steps("cluster_id", [123])

Mypy output:

examples/emr_example.py:10: error: List item 0 has incompatible type "int"; expected "str"
Found 1 error in 1 file (checked 1 source file)

So, looks like it works for me. Please let me know if it still does not for you.

[dvirtz]

I still get error: Module 'mypy_boto3.emr' has no attribute 'Client'. Which versions are you testing that on?

[vemel]

I am testing 1.10.36.0 local build. Okay, so you have mypy-boto3-emr installed. Does this work for you: from mypy_boto3_emr import Client ? If yes - there is something wrong with my index builder.

[dvirtz]

`from mypy_boto3_emr import Client` does work for me.

…

On Thu, 12 Dec 2019 at 10:04, Vlad Emelianov ***@***.***> wrote: I am testing 1.10.36.0 local build. Okay, so you have mypy-boto3-emr installed. Does this work for you: from mypy_boto3_emr import Client ? If yes - there is something wrong with my index builder. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#8?email_source=notifications&email_token=AB2ORDJJ2TAQTKDX2QIW7V3QYHWA7A5CNFSM4JZVMNVKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEGVZ42Y#issuecomment-564895339>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AB2ORDPUKUIELEUN5JSL2NLQYHWA7ANCNFSM4JZVMNVA> .

[vemel]

Hmm, then it looks like services index is wrong. could you try python -d mypy_boto3 and then check if from mypy_boto3.emr import Client works?

[dvirtz]

-d is debug output. do you want me to send you that?

[vemel]

Sorry, python -m mypy_boto3 of course

[vemel]

Any updates? Version 1.10.38.2 should generate index automatically, so you can try it out.

[dvirtz]

With 1.10.38.2 I get <string>:1: error: Module 'mypy_boto3.emr' has no attribute 'Client'; maybe "EMRClient"?

[vemel]

Hmm, yes, makes sense, as mypy does not like aliases. Use EMRClient and EMRServiceResource. I decided to change class names to make type resolution and error messages more clear.

[dvirtz]

👍

…

On Mon, Dec 16, 2019, 19:10 Vlad Emelianov ***@***.***> wrote: Hmm, yes, makes sense, as boto3 does not like aliases. Use EMRClient and EMRServiceResource. I decided to change class names to make type resolution and error messages more clear. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#8?email_source=notifications&email_token=AB2ORDOQDCES3X7IJ52TKU3QY6ZBLA5CNFSM4JZVMNVKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEG7NBQI#issuecomment-566153409>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AB2ORDKOMQ6M5OSW2TMROITQY6ZBLANCNFSM4JZVMNVA> .

[dvirtz]

Sorry I misled you but the issue is not solved yet. Funny enough, now I get:

mypy -c 'from mypy_boto3.emr import EMRClient'
<string>:1: error: Module 'mypy_boto3.emr' has no attribute 'EMRClient'; maybe "Client"?

and

mypy -c 'from mypy_boto3.emr import Client'
<string>:1: error: Module 'mypy_boto3.emr' has no attribute 'Client'; maybe "EMRClient"?

This is with version 1.10.40.1

[vemel]

This is very strange. please try to uninstall boto3-stubs, mypy-boto3 and mypy-boto3-emr packages and install them again with python -m pip install boto3-stubs[emr].

Let me know if it worked.

Also, I try to update to mypy 0.760.

[dvirtz]

Found it. I had no_implicit_reexport = True in my config file and commenting it makes the error go away. Perhaps you want to add everything to __all__ as described in https://mypy.readthedocs.io/en/latest/command_line.html#cmdoption-mypy-no-implicit-reexport

[vemel]

Makes sense, will do in the next update. This is because of star imports in generated files, should be done properly.

[vemel]

Should be fixed in 1.10.42.1