simplified spinner_* examples

Author: ramalho

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>

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