Fix comments and flake8

Author: vlad-perevezentsev

dpctl/_sycl_event.pyx

@@ -25,11 +25,11 @@ import logging
 
 from cpython cimport pycapsule
 
-from ._backend cimport (
+from ._backend cimport (  # noqa: E211
     DPCTLEvent_Create,
     DPCTLEvent_Delete,
     DPCTLEvent_Wait,
-    DPCTLSyclEventRef, 
+    DPCTLSyclEventRef,
     DPCTLEvent_Copy
 )
 
@@ -84,15 +84,15 @@ cdef void _event_capsule_deleter(object o):
 
 
 cdef class _SyclEventRaw:
-    """ Python wrapper class for a cl::sycl::event.
+    """ Python wrapper class for a ``cl::sycl::event``.
     """
 
     def __dealloc__(self):
         DPCTLEvent_Delete(self._event_ref)
 
 
 cdef class SyclEventRaw(_SyclEventRaw):
-    """ Python wrapper class for a cl::sycl::event.
+    """ Python wrapper class for a ``cl::sycl::event``.
     """
 
     @staticmethod
@@ -122,7 +122,7 @@ cdef class SyclEventRaw(_SyclEventRaw):
         if (self._event_ref is NULL):
             return -1
         return 0
-    
+
     cdef int _init_event_from_capsule(self, object cap):
         cdef DPCTLSyclEventRef ERef = NULL
         cdef DPCTLSyclEventRef ERef_copy = NULL
@@ -144,9 +144,9 @@ cdef class SyclEventRaw(_SyclEventRaw):
         else:
             return -128
 
-    def __cinit__(self,arg=None):
+    def __cinit__(self, arg=None):
         cdef int ret = 0
-        if arg == None:
+        if arg is None:
             ret = self._init_event_default()
         elif isinstance(arg, _SyclEventRaw):
             ret = self._init_event_from__SyclEventRaw(<_SyclEventRaw> arg)
@@ -175,22 +175,22 @@ cdef class SyclEventRaw(_SyclEventRaw):
             )
 
     cdef DPCTLSyclEventRef get_event_ref(self):
-        """ Returns the DPCTLSyclEventRef pointer for this class.
+        """ Returns the `DPCTLSyclEventRef` pointer for this class.
         """
         return self._event_ref
 
     cpdef void wait(self):
         DPCTLEvent_Wait(self._event_ref)
 
     def addressof_ref(self):
-        """ Returns the address of the C API DPCTLSyclEventRef pointer as
+        """ Returns the address of the C API `DPCTLSyclEventRef` pointer as
         a size_t.
 
         Returns:
-            The address of the DPCTLSyclEventRef object used to create this
-            SyclEvent cast to a size_t.
+            The address of the `DPCTLSyclEventRef` object used to create this
+            `SyclEvent` cast to a size_t.
         """
-        return int(<size_t>self._event_ref)
+        return <size_t>self._event_ref
 
     def _get_capsule(self):
         cdef DPCTLSyclEventRef ERef = NULL

dpctl/tests/test_sycl_event.py

@@ -18,28 +18,25 @@
 """
 
 import pytest
-import ctypes
 import numpy as np
 
 import dpctl
 import dpctl.memory as dpctl_mem
 import dpctl.program as dpctl_prog
 
-from ._helper import has_gpu
-
 
 def test_create_default_event_raw():
     try:
-        event = dpctl.SyclEventRaw()
+        dpctl.SyclEventRaw()
     except ValueError:
         pytest.fail("Failed to create a default event")
 
 
 def test_create_event_raw_from_SyclEvent():
     oclSrc = "                                                             \
-        kernel void add(global int* a) {                                    \
-            size_t index = get_global_id(0);                                   \
-            a[index] = a[index] + 1;                                  \
+        kernel void add(global int* a) {                                   \
+            size_t index = get_global_id(0);                               \
+            a[index] = a[index] + 1;                                       \
         }"
     q = dpctl.SyclQueue("opencl:gpu")
     prog = dpctl_prog.create_program_from_source(q, oclSrc)
@@ -56,7 +53,7 @@ def test_create_event_raw_from_SyclEvent():
     ev = q.submit(addKernel, args, r)
 
     try:
-        ev_copy = dpctl.SyclEventRaw(ev)
+        dpctl.SyclEventRaw(ev)
     except ValueError:
         pytest.fail("Failed to create an event from SyclEvent")
 
@@ -65,6 +62,14 @@ def test_create_event_raw_from_capsule():
     try:
         event = dpctl.SyclEventRaw()
         event_capsule = event._get_capsule()
-        event_from_cap = dpctl.SyclEventRaw(event_capsule)
+        dpctl.SyclEventRaw(event_capsule)
     except ValueError:
         pytest.fail("Failed to create an event from capsule")
+
+
+def test_copy_event():
+    ev = dpctl.SyclEventRaw()
+    try:
+        dpctl.SyclEventRaw(ev)
+    except ValueError:
+        pytest.fail("Failed to copy SyclEventRaw event")