Fix attribute error on win (#10209)

ppocr/data/__init__.py

@@ -53,17 +53,23 @@ def term_mp(sig_num, frame):
 
 def set_signal_handlers():
     pid = os.getpid()
-    pgid = os.getpgid(os.getpid())
-    # XXX: `term_mp` kills all processes in the process group, which in 
-    # some cases includes the parent process of current process and may 
-    # cause unexpected results. To solve this problem, we set signal 
-    # handlers only when current process is the group leader. In the 
-    # future, it would be better to consider killing only descendants of 
-    # the current process.
-    if pid == pgid:
-        # support exit using ctrl+c
-        signal.signal(signal.SIGINT, term_mp)
-        signal.signal(signal.SIGTERM, term_mp)
+    try:
+        pgid = os.getpgid(pid)
+    except AttributeError:
+        # In case `os.getpgid` is not available, no signal handler will be set,
+        # because we cannot do safe cleanup.
+        pass
+    else:
+        # XXX: `term_mp` kills all processes in the process group, which in 
+        # some cases includes the parent process of current process and may 
+        # cause unexpected results. To solve this problem, we set signal 
+        # handlers only when current process is the group leader. In the 
+        # future, it would be better to consider killing only descendants of 
+        # the current process.
+        if pid == pgid:
+            # support exit using ctrl+c
+            signal.signal(signal.SIGINT, term_mp)
+            signal.signal(signal.SIGTERM, term_mp)
 
 
 def build_dataloader(config, mode, device, logger, seed=None):