31 lines
1.2 KiB
Python
31 lines
1.2 KiB
Python
import time
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class TokenBucket:
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def __init__(self, capacity, fill_rate):
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self.capacity = capacity # Maximum number of tokens the bucket can hold
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self.fill_rate = fill_rate # Rate at which tokens are added (tokens/second)
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self.tokens = capacity # Current token count, start with a full bucket
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self.last_time = time.time() # Last time we checked the token count
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def allow_request(self, tokens=1):
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now = time.time()
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# Calculate how many tokens have been added since the last check
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time_passed = now - self.last_time
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self.tokens = min(self.capacity, self.tokens + time_passed * self.fill_rate)
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self.last_time = now
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# Check if we have enough tokens for this request
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if self.tokens >= tokens:
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self.tokens -= tokens
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return True
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return False
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# Usage example
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limiter = TokenBucket(capacity=10, fill_rate=1) # 10 tokens, refill 1 token per second
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for _ in range(15):
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print(limiter.allow_request()) # Will print True for the first 10 requests, then False
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time.sleep(0.1) # Wait a bit between requests
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time.sleep(5) # Wait for bucket to refill
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print(limiter.allow_request()) # True |