ignore files having a handle

file2mail.py

 import logging
 import mail
 import os
+import psutil
 import report
 import time
 
 report.stdoutLoggingConfigure(log_name_lvl=[('root', config.LOG_LEVEL), ])
 
 
+def has_handle(fpath):
+    for proc in psutil.process_iter():
+        try:
+            for item in proc.open_files():
+                if fpath == item.path:
+                    return True
+        except Exception:
+            pass
+
+    return False
+
+
 if __name__ == "__main__":
     while True:
         # Check if LOCK_FILE EXISTS
                 # Scan for files to send
                 for filename in fstools.filelist(config.TARGET_FOLDER):
                     # Exclude LOCK_FILE
-                    if filename != LOCK_FILE:
+                    if filename != LOCK_FILE and not has_handle(filename):
                         logger.info("Found %s to send via E-Mail to %s.", filename, config.SEND_TO)
                         # Send File as E-Mail
                         try: