def _uptime_mac():
"""Returns uptime in seconds or None, on Mac OS."""
try:
# Python docs say a clock tick is 1/60th of a second, Mac OS docs say
# it's ``approximately'' 1/60th. It's incremented by vertical retraces,
# which the Macintosh Plus docs say happen 60.15 times per second.
# I don't know if ``approximately'' means it's actually 1/60.15, or
# 1/60 on some machines and 1/60.15 on others.
return MacOS.GetTicks() / 60.15
except NameError:
return None
def time():
return MacOS.GetTicks() / 60.0
