early bailout conditions caught by type check

mem_edit/linux.py

@@ -61,6 +61,8 @@ class Process(AbstractProcess):
         self.pid = process_id
 
     def close(self) -> None:
+        if self.pid is None:
+            return
         os.kill(self.pid, signal.SIGSTOP)
         os.waitpid(self.pid, 0)
         ptrace(ptrace_commands['PTRACE_DETACH'], self.pid, 0, 0)

mem_edit/windows.py

@@ -233,6 +233,8 @@ class Process(AbstractProcess):
                 logger.debug(f'Checking name for pid {pid}')
                 with Process.open_process(pid) as process:
                     path = process.get_path()
+                if path is None:
+                    continue
 
                 name = os.path.basename(path)
                 logger.debug(f'Name was "{name}"')