Version 2.9.0 is not compatible with aws-cli

[m4vazquez]

Hello, I have this error on aws-cli execution:

• aws --version
  Traceback (most recent call last):
  File "/usr/local/bin/aws", line 19, in
  import awscli.clidriver
  File "/usr/local/lib/python3.5/site-packages/awscli/clidriver.py", line 17, in
  import botocore.session
  File "/usr/local/lib/python3.5/site-packages/botocore/session.py", line 29, in
  import botocore.configloader
  File "/usr/local/lib/python3.5/site-packages/botocore/configloader.py", line 19, in
  from botocore.compat import six
  File "/usr/local/lib/python3.5/site-packages/botocore/compat.py", line 26, in
  from dateutil.tz import tzlocal
  File "/usr/local/lib/python3.5/site-packages/dateutil/init.py", line 5, in
  from ._version import version as version
  File "/usr/local/lib/python3.5/site-packages/dateutil/_version.py", line 10
  version: str
  ^
  SyntaxError: invalid syntax

---

I fixed uninstalling 2.9.0 and install 2.8.2 and it's works but on the pip install aws-cli call any version <3.0.0 so I have to make changes on more that two hundred of piplelines.

[mattmauriello]

we are having the same issues. another package install updates dateutil to 2.9.0 and we get the exact same stack trace.
running aws-cli/1.18.147 Python/2.7.18

we got it to work again with
pip2 install --force-reinstall -v 'python-dateutil==2.8.2'

seems to be simply because the _version.py file uses type checking which doesn't seem to be supported in python2.7, not until 3.6

[tipabu]

Duplicate of #1344 -- looks like the short-term plan is to pin an older version of setuptools_scm (which was responsible for generating _version.py) and get another release out; longer term, see #1347

Until the short-term fix is out, rolling back to python-dateutil==2.8.2 is about all downstream consumers can do.

[pganssle]

Also, I think there's no benefit to upgrading to 2.9.0 for any Python versions older than 3.7 unless you are using the internal zoneinfo database (which you hopefully are not, or you are patching in a newer version anyway) — that would only come up on Windows for the most part.

[pganssle]

Closing as duplicate.

[m4vazquez]

i'm using python 3.5.7 not 2.x why you close the issue if is another python version?

[mattmauriello]

@m4vazquez , the defect that impacted python2.7 also impacts python3.5, as neither of those versions supported the type setting that the new setuptools created. the fix issued today removes that issue, so dateutil can be loaded in BOTH those versions, and therefore AWSCLI doesn't fail when trying to import it.