simplified spinner_* examples

ramalho · ramalho · commit a58ecf6bdea8 · 2019-05-16T18:54:52.000-03:00
diff --git a/18-asyncio-py3.7/spinner_asyncio.py b/18-asyncio-py3.7/spinner_asyncio.py
@@ -9,21 +9,17 @@
 # BEGIN SPINNER_ASYNCIO
 import asyncio
 import itertools
-import sys
 
 
 async def spin(msg):  # <1>
-    write, flush = sys.stdout.write, sys.stdout.flush
     for char in itertools.cycle('|/-\\'):
         status = char + ' ' + msg
-        write(status)
-        flush()
-        write('\x08' * len(status))
+        print(status, flush=True, end='\r')
         try:
             await asyncio.sleep(.1)  # <2>
         except asyncio.CancelledError:  # <3>
             break
-    write(' ' * len(status) + '\x08' * len(status))
+    print(' ' * len(status), end='\r')
 
 
 async def slow_function():  # <4>
diff --git a/18-asyncio-py3.7/spinner_thread.py b/18-asyncio-py3.7/spinner_thread.py
@@ -10,20 +10,15 @@
 import threading
 import itertools
 import time
-import sys
 
 
-def spin(msg, done):  # <2>
-    write, flush = sys.stdout.write, sys.stdout.flush
+def spin(msg, done):  # <1>
     for char in itertools.cycle('|/-\\'):  # <3>
         status = char + ' ' + msg
-        write(status)
-        flush()
-        write('\x08' * len(status))  # <4>
+        print(status, flush=True, end='\r')
         if done.wait(.1):  # <5>
             break
-    write(' ' * len(status) + '\x08' * len(status))  # <6>
-
+    print(' ' * len(status), end='\r')
 
 def slow_function():  # <7>
     # pretend waiting a long time for I/O
