fix: make bangla g2p deps optional

.github/workflows/tests.yml

@@ -45,7 +45,7 @@ jobs:
           sed -i 's/https:\/\/coqui.gateway.scarf.sh\//https:\/\/github.com\/coqui-ai\/TTS\/releases\/download\//g' TTS/.models.json
       - name: Install TTS
         run: |
-          python3 -m uv pip install --system "coqui-tts[dev,server,ja] @ ."
+          python3 -m uv pip install --system "coqui-tts[dev,server,languages] @ ."
           python3 setup.py egg_info
       - name: Unit tests
         run: make ${{ matrix.subset }}

README.md

@@ -143,9 +143,33 @@ If you plan to code or train models, clone 🐸TTS and install it locally.
 
 ```bash
 git clone https://github.com/idiap/coqui-ai-TTS
-pip install -e .[all,dev,notebooks,server]  # Select the relevant extras
+pip install -e .
 ```
 
+### Optional dependencies
+
+The following extras allow the installation of optional dependencies:
+
+| Name | Description |
+|------|-------------|
+| `all` | All optional dependencies, except `dev` and `docs` |
+| `dev` | Development dependencies |
+| `dev` | Dependencies for building the documentation |
+| `notebooks` | Dependencies only used in notebooks |
+| `server` | Dependencies to run the TTS server |
+| `bn` | Bangla G2P |
+| `ja` | Japanese G2P |
+| `languages` | All language-specific dependencies |
+
+You can install them with one of the following commands:
+
+```bash
+pip install coqui-tts[server,ja]
+pip install -e .[server,ja]
+```
+
+### Platforms
+
 If you are on Ubuntu (Debian), you can also run following commands for installation.
 
 ```bash

TTS/tts/utils/text/bangla/phonemizer.py

@@ -1,8 +1,11 @@
 import re
 
-import bangla
-from bnnumerizer import numerize
-from bnunicodenormalizer import Normalizer
+try:
+    import bangla
+    from bnnumerizer import numerize
+    from bnunicodenormalizer import Normalizer
+except ImportError as e:
+    raise ImportError("Bangla requires: bangla, bnnumerizer, bnunicodenormalizer") from e
 
 # initialize
 bnorm = Normalizer()

pyproject.toml

@@ -74,10 +74,6 @@ dependencies = [
     "g2pkk>=0.1.1",
     # Gruut + supported languages
     "gruut[de,es,fr]==2.2.3",
-    # Bangla
-    "bangla",
-    "bnnumerizer",
-    "bnunicodenormalizer",
     # Tortoise
     "einops>=0.6.0",
     "transformers>=4.33.0",
@@ -115,12 +111,22 @@ notebooks = [
 # For running the TTS server
 server = ["flask>=2.0.1"]
 # Language-specific dependencies, mainly for G2P
+# Bangla
+bn = [
+    "bangla",
+    "bnnumerizer",
+    "bnunicodenormalizer",
+]
 # Japanese
 ja = [
     "mecab-python3",
     "unidic-lite==1.0.8",
     "cutlet",
 ]
+# All language-specific dependencies
+languages = [
+    "coqui-tts[bn,ja]",
+]
 # Installs all extras (except dev and docs)
 all = [
     "coqui-tts[notebooks,server,ja]",