Fix exception causes all over the codebase

1 files changed, 5 insertions, 5 deletions

diff --git a/sphinx/pycode/__init__.py b/sphinx/pycode/__init__.py
index 963680a54..29e53178f 100644
--- a/sphinx/pycode/__init__.py
+++ b/sphinx/pycode/__init__.py
@@ -37,7 +37,7 @@ class ModuleAnalyzer:
         try:
             mod = import_module(modname)
         except Exception as err:
-            raise PycodeError('error importing %r' % modname, err)
+            raise PycodeError('error importing %r' % modname, err) from err
         loader = getattr(mod, '__loader__', None)
         filename = getattr(mod, '__file__', None)
         if loader and getattr(loader, 'get_source', None):
@@ -54,7 +54,7 @@ class ModuleAnalyzer:
             try:
                 filename = loader.get_filename(modname)
             except ImportError as err:
-                raise PycodeError('error getting filename for %r' % modname, err)
+                raise PycodeError('error getting filename for %r' % modname, err) from err
         if filename is None:
             # all methods for getting filename failed, so raise...
             raise PycodeError('no source found for module %r' % modname)
@@ -92,7 +92,7 @@ class ModuleAnalyzer:
             if '.egg' + path.sep in filename:
                 obj = cls.cache['file', filename] = cls.for_egg(filename, modname)
             else:
-                raise PycodeError('error opening %r' % filename, err)
+                raise PycodeError('error opening %r' % filename, err) from err
         return obj
 
     @classmethod
@@ -104,7 +104,7 @@ class ModuleAnalyzer:
                 code = egg.read(relpath).decode()
                 return cls.for_string(code, modname, filename)
         except Exception as exc:
-            raise PycodeError('error opening %r' % filename, exc)
+            raise PycodeError('error opening %r' % filename, exc) from exc
 
     @classmethod
     def for_module(cls, modname: str) -> "ModuleAnalyzer":
@@ -169,7 +169,7 @@ class ModuleAnalyzer:
             self.tags = parser.definitions
             self.tagorder = parser.deforders
         except Exception as exc:
-            raise PycodeError('parsing %r failed: %r' % (self.srcname, exc))
+            raise PycodeError('parsing %r failed: %r' % (self.srcname, exc)) from exc
 
     def find_attr_docs(self) -> Dict[Tuple[str, str], List[str]]:
         """Find class and module-level attributes and their documentation."""