class WarnOnlyOnce:
warnings = set()
@classmethod
def warn(cls,message):
# storing int == less memory then storing raw message
h = hash(message)
if h not in cls.warnings:
# do your warning
print(f"Warning: {message}")
cls.warnings.add(h)
WarnOnlyOnce.warn("First warning")
WarnOnlyOnce.warn("First warning") # skipped - identical spelling
WarnOnlyOnce.warn("Second warning")
WarnOnlyOnce.warn("First warning") # skipped - identical spelling
WarnOnlyOnce.warn("First warning") # skipped - identical spelling
WarnOnlyOnce.warn("Last warning")
WarnOnlyOnce.warn("LAst warning") # different spelling
WarnOnlyOnce.warn("LASt warning") # different spelling
WarnOnlyOnce.warn("LAST warning") # different spelling
输出:
Warning: First warning
Warning: Second warning
Warning: Last warning
Warning: LAst warning
Warning: LASt warning
Warning: LAST warning
您可以构造一个类来执行并记忆给定的警告:
输出:
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