A sane T9 engine.

Features:

• contractions (just type the word like you would if the apostrophe didn't exist. no need to hit '1')
• re-completions on backspace
• auto capitalization/custom capitalization
• persistent custom dictionary

Keys:

• 1-9: normal T9 input (1 is punctuation, 2-9 is a-z)
• a-z, punctuation: alternate input for QWERTY keyboards. maps to one of the 1-9 keys.
• Tab: next completion
• 0 or space: accept completion and insert a space
• Backspace: delete character
• Enter: when '?' is showing (indicating an unknown word): add a custom word to the dictionary. Otherwise, accept the current completion without adding a space
• ^: cycle capitalization mode
• ctrl-w: backspace entire current word
• ~: toggle T9 engine on and off
• ctrl-c: copy current line to clipboard
• ctrl-u: clear entire line

Quickstart:

git clone https://github.com/neutralinsomniac/t9.git
cd t9
python3 -m venv .
source bin/activate
pip install -r requirements.txt
./t9.py google-10000-english-usa.txt