Add ImportError for phunspell and symspellpy

Author: wannaphong

pythainlp/spell/phunspell.py

@@ -13,7 +13,10 @@
 """
 from typing import List
 
-import phunspell
+try:
+    import phunspell
+except ImportError:
+    raise ImportError("Import Error; Install phunspell by pip install phunspell")
 
 pspell = phunspell.Phunspell("th_TH")
 

pythainlp/spell/symspellpy.py

@@ -15,7 +15,10 @@
 
 from typing import List
 
-from symspellpy import SymSpell, Verbosity
+try:
+    import symspellpy
+except ImportError:
+    raise ImportError("Import Error; Install symspellpy by pip install symspellpy")
 
 from pythainlp.corpus import get_corpus_path, path_pythainlp_corpus