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@@ -209,21 +209,22 @@ def exit_if_mswin(feature):
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if g.platform == 'win':
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die(2, capfirst(feature) + ' not supported on the MSWin / MSYS2 platform' )
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-def get_keccak():
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-
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- from .opts import opt
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- # called in opts.init() via CoinProtocol, so must use getattr():
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- if getattr(opt,'use_internal_keccak_module',False):
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- from .contrib.keccak import keccak_256
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- qmsg('Using internal keccak module by user request')
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- return keccak_256
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-
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- try:
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- from sha3 import keccak_256
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- except:
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- from .contrib.keccak import keccak_256
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+def get_keccak(cached_ret=[]):
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+
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+ if not cached_ret:
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+ from .opts import opt
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+ # called in opts.init() via CoinProtocol, so must use getattr():
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+ if getattr(opt,'use_internal_keccak_module',False):
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+ qmsg('Using internal keccak module by user request')
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+ from .contrib.keccak import keccak_256
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+ else:
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+ try:
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+ from sha3 import keccak_256
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+ except:
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+ from .contrib.keccak import keccak_256
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+ cached_ret.append(keccak_256)
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- return keccak_256
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+ return cached_ret[0]
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# From 'man dd':
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# c=1, w=2, b=512, kB=1000, K=1024, MB=1000*1000, M=1024*1024,
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