textual/questions/compose-result.question.md

title	alt_titles
How can I fix ImportError cannot import name ComposeResult from textual.app ?	Can't import ComposeResult Error about missing ComposeResult from textual.app

You likely have an older version of Textual. You can install the latest version by adding the -U switch which will force pip to upgrade.

The following should do it:

pip install "textual[dev]" -U