all exceptions inherit from PyJwtError (#340)

* all exceptions inherit from PyJwtError

* s/Jwt/JWT/

* add to init

2 files changed, 10 insertions, 2 deletions

diff --git a/jwt/__init__.py b/jwt/__init__.py
index 823128d..3e4826b 100644
--- a/jwt/__init__.py
+++ b/jwt/__init__.py
@@ -27,4 +27,5 @@ from .exceptions import (
     InvalidIssuedAtError, InvalidIssuerError, ExpiredSignature,
     InvalidAudience, InvalidIssuer, MissingRequiredClaimError,
     InvalidSignatureError,
+    PyJWTError,
 )
diff --git a/jwt/exceptions.py b/jwt/exceptions.py
index b396bf1..2a6aa59 100644
--- a/jwt/exceptions.py
+++ b/jwt/exceptions.py
@@ -1,4 +1,11 @@
-class InvalidTokenError(Exception):
+class PyJWTError(Exception):
+    """
+    Base class for all exceptions
+    """
+    pass
+
+
+class InvalidTokenError(PyJWTError):
     pass
 
 
@@ -30,7 +37,7 @@ class ImmatureSignatureError(InvalidTokenError):
     pass
 
 
-class InvalidKeyError(Exception):
+class InvalidKeyError(PyJWTError):
     pass