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blocker = wx.PowerResourceBlocker(
wx.POWER_RESOURCE_SYSTEM, "Downloading something important")
if not blocker.IsInEffect():
# If the resource could not be acquired, tell the user that he has
# to keep the system alive
wx.LogMessage("Warning: system may suspend while downloading.")
# Run an important download and the system will not suspend while downloading
for i in range(download.size()):
download.read_byte()
del blocker
# wx.POWER_RESOURCE_SYSTEM automatically released here.
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