ProducerBatch first = deque.peekFirst(); if (first != null) { boolean backoff = first.attempts() > 0 && first.waitedTimeMs(now) < retryBackoffMs; if (!backoff) { if (size + first.estimatedSizeInBytes() > maxSize
isEmpty: 检查栈是否为空。 isFull: 检查栈是否已满。 四,栈的代码实现 1.Python语言实现 方式1.使用Python内置数据类型实现: list, collections.deque, queue.LifoQueue 方式2.封装Stack类来实现 Demo.01: 基于list实现 stack = [] #基于append函数实现入栈操作 stack.append('a') stack.append('b') stac...
安全专家已经确定 Python 是一种用于开发信息安全工具包的语言,例如 w3af。模块化设计、易读的代码和完全开发的库套件使 Python 适合安全研究人员和专家编写脚本并构建安全测试工具。 基于Python 的工具包括各种类型的模糊测试工具、代理甚至偶尔的漏洞利用。Python 是当前几种开源渗透测试工具的主要语言,从用于内存分析的 ...
deque is preferred over a list in the cases where we need quicker append and pop from both ends of the container # deque -list-like container with fast appends and pops on either end from collections import deque queue = deque() # create deque queue.append(2) # append right queue.appen...
if self.is_empty(): return None return self.items.pop() def size(self): """返回队列大小""" return len(self.items) if __name__ == "__main__": deque = Deque() deque.add_front(1) deque.add_front(2) deque.add_rear(3) ...
(50, int(WIN_HEIGHT/2 - Bird.HEIGHT/2), 2, (images['WingUp'], images['WingDown'])) pipes = deque() #deque is similar to list which is preferred otherwise if we need faster operations like #append and pop frame_clock = 0 # this counter is only incremented if the game isn't ...
File(mode="r"), ) def cli(file, lines): for line in deque(file, maxlen=lines): click.echo(line, nl=False) if __name__ == "__main__": cli() In this example, you first import the deque data type from the collections module. You’ll use this type to quickly get the ...
<el> = <deque>.popleft() # Raises IndexError if deque is empty.OperatorModule of functions that provide the functionality of operators. Functions are ordered and grouped by operator precedence, from least to most binding. Logical and arithmetic operators in lines 1, 3 and 5 are also ordered...
available. If timeout is a positive number, it blocks at most timeout seconds and raises the Empty exception if no item was available within that time. Otherwise (block is false), return an item if one is immediately available, else raise the Empty exception (timeout is ignored in that ...
PostgreSQL notices are stored in a deque called Connection.notices and added using the append() method. Similarly there are Connection.notifications for notifications . Here's an example:>>> import pg8000.native >>> >>> con = pg8000.native.Connection("postgres", password="cpsnow") >>> >...