Python可跨平台实现获取按键的方法
本文实例讲述了Python可跨平台实现获取按键的方法。分享给大家供大家参考。具体如下：
class_Getch:
"""Getsasinglecharacterfromstandardinput. Doesnotechotothescreen."""
def__init__(self):
try:
self.impl=_GetchWindows()
exceptImportError:
try:
self.impl=_GetchMacCarbon()
exceptAttributeError:
self.impl=_GetchUnix()
def__call__(self):returnself.impl()
class_GetchUnix:
def__init__(self):
importtty,sys,termios#importtermiosnoworelseyou'llgettheUnixversionontheMac
def__call__(self):
importsys,tty,termios
fd=sys.stdin.fileno()
old_settings=termios.tcgetattr(fd)
try:
tty.setraw(sys.stdin.fileno())
ch=sys.stdin.read(1)
finally:
termios.tcsetattr(fd,termios.TCSADRAIN,old_settings)
returnch
class_GetchWindows:
def__init__(self):
importmsvcrt
def__call__(self):
importmsvcrt
returnmsvcrt.getch()
class_GetchMacCarbon:
"""
AfunctionwhichreturnsthecurrentASCIIkeythatisdown;
ifnoASCIIkeyisdown,thenullstringisreturned. The
pagehttp://www.mactech.com/macintosh-c/chap02-1.htmlwas
veryhelpfulinfiguringouthowtodothis.
"""
def__init__(self):
importCarbon
Carbon.Evt#seeifithasthis(inUnix,itdoesn't)
def__call__(self):
importCarbon
ifCarbon.Evt.EventAvail(0x0008)[0]==0:#0x0008isthekeyDownMask
return''
else:
#
#Theeventcontainsthefollowinginfo:
#(what,msg,when,where,mod)=Carbon.Evt.GetNextEvent(0x0008)[1]
#
#Themessage(msg)containstheASCIIcharwhichis
#extractedwiththe0x000000FFcharCodeMask;this
#numberisconvertedtoanASCIIcharacterwithchr()and
#returned
#
(what,msg,when,where,mod)=Carbon.Evt.GetNextEvent(0x0008)[1]
returnchr(msg&0x000000FF)
if__name__=='__main__':#alittletest
print'Pressakey'
inkey=_Getch()
importsys
foriinxrange(sys.maxint):
k=inkey()
ifk<>'':break
print'youpressed',k
希望本文所述对大家的Python程序设计有所帮助。
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