fix: make chinese g2p deps optional

README.md

@@ -159,9 +159,10 @@ The following extras allow the installation of optional dependencies:
 | `server` | Dependencies to run the TTS server |
 | `bn` | Bangla G2P |
 | `ja` | Japanese G2P |
+| `zh` | Chinese G2P |
 | `languages` | All language-specific dependencies |
 
-You can install them with one of the following commands:
+You can install extras with one of the following commands:
 
 ```bash
 pip install coqui-tts[server,ja]

TTS/tts/layers/xtts/tokenizer.py

@@ -4,7 +4,6 @@ import re
 import textwrap
 from functools import cached_property
 
-import pypinyin
 import torch
 from hangul_romanize import Transliter
 from hangul_romanize.rule import academic
@@ -577,6 +576,10 @@ def basic_cleaners(text):
 
 
 def chinese_transliterate(text):
+    try:
+        import pypinyin
+    except ImportError as e:
+        raise ImportError("Chinese requires: pypinyin") from e
     return "".join(
         [p[0] for p in pypinyin.pinyin(text, style=pypinyin.Style.TONE3, heteronym=False, neutral_tone_with_five=True)]
     )

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

@@ -1,7 +1,10 @@
 from typing import List
 
-import jieba
+try:
-import pypinyin
+    import jieba
+    import pypinyin
+except ImportError as e:
+    raise ImportError("Chinese requires: jieba, pypinyin") from e
 
 from .pinyinToPhonemes import PINYIN_DICT
 

TTS/tts/utils/text/phonemizers/__init__.py

@@ -3,7 +3,6 @@ from TTS.tts.utils.text.phonemizers.belarusian_phonemizer import BEL_Phonemizer
 from TTS.tts.utils.text.phonemizers.espeak_wrapper import ESpeak
 from TTS.tts.utils.text.phonemizers.gruut_wrapper import Gruut
 from TTS.tts.utils.text.phonemizers.ko_kr_phonemizer import KO_KR_Phonemizer
-from TTS.tts.utils.text.phonemizers.zh_cn_phonemizer import ZH_CN_Phonemizer
 
 try:
     from TTS.tts.utils.text.phonemizers.bangla_phonemizer import BN_Phonemizer
@@ -15,6 +14,11 @@ try:
 except ImportError:
     JA_JP_Phonemizer = None
 
+try:
+    from TTS.tts.utils.text.phonemizers.zh_cn_phonemizer import ZH_CN_Phonemizer
+except ImportError:
+    ZH_CN_Phonemizer = None
+
 PHONEMIZERS = {b.name(): b for b in (ESpeak, Gruut, KO_KR_Phonemizer)}
 
 
@@ -36,7 +40,6 @@ DEF_LANG_TO_PHONEMIZER.update(_new_dict)
 
 # Force default for some languages
 DEF_LANG_TO_PHONEMIZER["en"] = DEF_LANG_TO_PHONEMIZER["en-us"]
-DEF_LANG_TO_PHONEMIZER["zh-cn"] = ZH_CN_Phonemizer.name()
 DEF_LANG_TO_PHONEMIZER["ko-kr"] = KO_KR_Phonemizer.name()
 DEF_LANG_TO_PHONEMIZER["be"] = BEL_Phonemizer.name()
 
@@ -47,6 +50,9 @@ if BN_Phonemizer is not None:
 if JA_JP_Phonemizer is not None:
     PHONEMIZERS[JA_JP_Phonemizer.name()] = JA_JP_Phonemizer
     DEF_LANG_TO_PHONEMIZER["ja-jp"] = JA_JP_Phonemizer.name()
+if ZH_CN_Phonemizer is not None:
+    PHONEMIZERS[ZH_CN_Phonemizer.name()] = ZH_CN_Phonemizer
+    DEF_LANG_TO_PHONEMIZER["zh-cn"] = ZH_CN_Phonemizer.name()
 
 
 def get_phonemizer_by_name(name: str, **kwargs) -> BasePhonemizer:
@@ -64,6 +70,8 @@ def get_phonemizer_by_name(name: str, **kwargs) -> BasePhonemizer:
     if name == "gruut":
         return Gruut(**kwargs)
     if name == "zh_cn_phonemizer":
+        if ZH_CN_Phonemizer is None:
+            raise ValueError("You need to install ZH phonemizer dependencies. Try `pip install coqui-tts[zh]`.")
         return ZH_CN_Phonemizer(**kwargs)
     if name == "ja_jp_phonemizer":
         if JA_JP_Phonemizer is None:

pyproject.toml

@@ -65,9 +65,6 @@ dependencies = [
     # Coqui stack
     "coqui-tts-trainer>=0.1",
     "coqpit>=0.0.16",
-    # Chinese
-    "jieba",
-    "pypinyin",
     # Korean
     "hangul_romanize",
     "jamo",
@@ -123,13 +120,18 @@ ja = [
     "unidic-lite==1.0.8",
     "cutlet",
 ]
+# Chinese
+zh = [
+    "jieba",
+    "pypinyin",
+]
 # All language-specific dependencies
 languages = [
-    "coqui-tts[bn,ja]",
+    "coqui-tts[bn,ja,zh]",
 ]
 # Installs all extras (except dev and docs)
 all = [
-    "coqui-tts[notebooks,server,bn,ja]",
+    "coqui-tts[notebooks,server,bn,ja,zh]",
 ]
 
 [project.urls]