Silent PYTEXT_HOME print/exception during importing

pytext/utils/path.py

@@ -7,23 +7,27 @@ def get_pytext_home():
     internal_home = os.path.realpath(os.path.join(__file__, "../../"))
     oss_home = os.path.realpath(os.path.join(__file__, "../../../"))
     default_home = ""
+    # use tests as anchor which will always in PYTEXT_HOME/tests
     if os.path.exists(os.path.join(internal_home, "tests")):
         default_home = internal_home
     elif os.path.exists(os.path.join(oss_home, "tests")):
         default_home = oss_home
     else:
-        raise Exception("Can't find PYTEXT_HOME")
+        # when PyText is used as a module and packed as part of a single file X
+        # __file__ will be path of X instead of path.py
+        # in these case, PYTEXT_HOME will be the parent folder of X
+        default_home = os.path.dirname(__file__)
     pytext_home = os.environ.get("PYTEXT_HOME", default_home)
-    print(f"PYTEXT_HOME: {pytext_home}")
     return pytext_home
 
 
+# all relateive path in PyText is based on PYTEXT_HOME
 PYTEXT_HOME = get_pytext_home()
 
 
-def get_absolute_path(path):
+def get_absolute_path(file_path):
     return (
-        path
-        if path.startswith("/")
-        else os.path.realpath(os.path.join(PYTEXT_HOME, path))
+        file_path
+        if os.path.isabs(file_path)
+        else os.path.realpath(os.path.join(PYTEXT_HOME, file_path))
     )