Revert "Update trace args to file_path in documentation"

This reverts commit 4a280ef8803eed2179fae24dcda805586f191e65.

Reason for revert: Docs accurately reflect the state in ToT. A new release of the Python library needs to happen.

Change-Id: I8f3bb025ddbf337a67426d0255b218c6f84d99a4
diff --git a/python/example.py b/python/example.py
index b0de1b2..ffdd9ac 100644
--- a/python/example.py
+++ b/python/example.py
@@ -40,11 +40,11 @@
   if args.address is None and args.file is None:
     raise Exception("You must specify an address or a file path to trace")
   elif args.address is None:
-    tp = TraceProcessor(file_path=args.file, config=config)
+    tp = TraceProcessor(trace=args.file, config=config)
   elif args.file is None:
     tp = TraceProcessor(addr=args.address, config=config)
   else:
-    tp = TraceProcessor(file_path=args.file, addr=args.address, config=config)
+    tp = TraceProcessor(trace=args.file, addr=args.address, config=config)
 
   # Iterate through QueryResultIterator
   res_it = tp.query('select * from slice limit 10')