poetry run mycommand fails, but running poetry shell and then mycommand succeeds

[aahnik]

root@adb6cc63d099:/app# poetry run tgcf
Traceback (most recent call last):
  File "<string>", line 1, in <module>
AttributeError: module 'tgcf' has no attribute 'cli'

# why this 👆 unexpected

root@adb6cc63d099:/app# tgcf --version
bash: tgcf: command not found

# expected,👆 as tgcf is installed within virtual env

root@adb6cc63d099:/app# poetry shell
Spawning shell within /root/.cache/pypoetry/virtualenvs/tgcf-9TtSrW0h-py3.9
root@adb6cc63d099:/app# . /root/.cache/pypoetry/virtualenvs/tgcf-9TtSrW0h-py3.9/bin/activate


(tgcf-9TtSrW0h-py3.9) root@adb6cc63d099:/app# tgcf
Usage: tgcf [OPTIONS] MODE:[past|live]
Try 'tgcf --help' for help.

Error: Missing argument 'MODE:[past|live]'.  Choose from:
        past,
        live.
# this error 👆 is expected, its fine

Link to tgcf

[aahnik]

My error got fixed by changing my pyproject.toml

 [tool.poetry.scripts]
-tgcf = 'tgcf:cli.app'
+tgcf = 'tgcf.cli:app'