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updated threading example to use Event object instead of user defined Signal instance

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+10

-20

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Lines changed: 5 additions & 10 deletions

Original file line number	Diff line number	Diff line change
`@@ -11,19 +11,14 @@`
`11`	`11`	`import sys`
`12`	`12`
`13`	`13`
`14`		`-class Signal: # <1>`
`15`		`- go = True`
`16`		`-`
`17`		`-`
`18`		`-def spin(msg, signal): # <2>`
	`14`	`+def spin(msg, done): # <2>`
`19`	`15`	`write, flush = sys.stdout.write, sys.stdout.flush`
`20`	`16`	`for char in itertools.cycle('\|/-\\'): # <3>`
`21`	`17`	`status = char + ' ' + msg`
`22`	`18`	`write(status)`
`23`	`19`	`flush()`
`24`	`20`	`write('\x08' * len(status)) # <4>`
`25`		`- time.sleep(.1)`
`26`		`- if not signal.go: # <5>`
	`21`	`+ if done.wait(.1): # <5>`
`27`	`22`	`break`
`28`	`23`	`write(' ' * len(status) + '\x08' * len(status)) # <6>`
`29`	`24`
`@@ -35,13 +30,13 @@ def slow_function(): # <7>`
`35`	`30`
`36`	`31`
`37`	`32`	`def supervisor(): # <9>`
`38`		`- signal = Signal()`
	`33`	`+ done = threading.Event()`
`39`	`34`	`spinner = threading.Thread(target=spin,`
`40`		`- args=('thinking!', signal))`
	`35`	`+ args=('thinking!', done))`
`41`	`36`	`print('spinner object:', spinner) # <10>`
`42`	`37`	`spinner.start() # <11>`
`43`	`38`	`result = slow_function() # <12>`
`44`		`- signal.go=False # <13>`
	`39`	`+ done.set() # <13>`
`45`	`40`	`spinner.join() # <14>`
`46`	`41`	`return result`
`47`	`42`

Lines changed: 5 additions & 10 deletions

Original file line number	Diff line number	Diff line change
`@@ -11,19 +11,14 @@`
`11`	`11`	`import sys`
`12`	`12`
`13`	`13`
`14`		`-class Signal: # <1>`
`15`		`- go = True`
`16`		`-`
`17`		`-`
`18`		`-def spin(msg, signal): # <2>`
	`14`	`+def spin(msg, done): # <2>`
`19`	`15`	`write, flush = sys.stdout.write, sys.stdout.flush`
`20`	`16`	`for char in itertools.cycle('\|/-\\'): # <3>`
`21`	`17`	`status = char + ' ' + msg`
`22`	`18`	`write(status)`
`23`	`19`	`flush()`
`24`	`20`	`write('\x08' * len(status)) # <4>`
`25`		`- time.sleep(.1)`
`26`		`- if not signal.go: # <5>`
	`21`	`+ if done.wait(.1): # <5>`
`27`	`22`	`break`
`28`	`23`	`write(' ' * len(status) + '\x08' * len(status)) # <6>`
`29`	`24`
`@@ -35,13 +30,13 @@ def slow_function(): # <7>`
`35`	`30`
`36`	`31`
`37`	`32`	`def supervisor(): # <9>`
`38`		`- signal = Signal()`
	`33`	`+ done = threading.Event()`
`39`	`34`	`spinner = threading.Thread(target=spin,`
`40`		`- args=('thinking!', signal))`
	`35`	`+ args=('thinking!', done))`
`41`	`36`	`print('spinner object:', spinner) # <10>`
`42`	`37`	`spinner.start() # <11>`
`43`	`38`	`result = slow_function() # <12>`
`44`		`- signal.go=False # <13>`
	`39`	`+ done.set() # <13>`
`45`	`40`	`spinner.join() # <14>`
`46`	`41`	`return result`
`47`	`42`

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