我们可以使用 pickletools模块 将opcode转化成方便我们阅读的形式 importpickletoolsopcode=b'''cossystem(S'/bin/sh'tR.'''pickletools.dis(opcode)'''输出0: c GLOBAL 'os system'11: ( MARK12: S STRING '/bin/sh'23: t TUPLE (MARK at 11)24: R REDUCE25: . STOPhighest protocol among opcodes =...
days = [1, 2, 3, 4, 5, 6, 7, 8] transfers = [] for i in range(10000): day = random.choice(days) bank_code = random.choice(BANK_CODES) branch_id = random.choice(BRANCH_IDS) amount = random.randint(1000, 1000000) transfers.append((day, bank_code, branch_id, amount)) 在这...
gethostbyname(hostname) return hostname + ip def sendmail(From,To,boby): try: # server = smtplib.SMTP() #创建一个SMTP对象# server = smtplib.connect(SMTPHOST,"25") #非SSL方式连接smtp主机 server = smtplib.SMTP_SSL(SMTPHOST) # 通过SSL方法连接smtp主机默认使用465端口# server.starttls() #...
然后从www.nostarch.com/crackingcodes下载frankenstein.txt,并将该文件放在与transpositoinfilecipher.py文件相同的文件夹中。按F5运行程序。 换位FileCipher.py 代码语言:javascript 复制 # Transposition Cipher Encrypt/Decrypt File # https://www.nostarch.com/crackingcodes/ (BSD Licensed) import time, os, sy...
我还在 YouTube 上发布了一个73 秒的视频,这样你就可以看到它们运行时 macOS Finder 窗口显示保存的标志。这些脚本正在从fluentpython.com下载图片,该网站位于 CDN 后面,因此在第一次运行时可能会看到较慢的结果。示例 20-1 中的结果是在多次运行后获得的,因此 CDN 缓存已经热了。
codes. As a result, the jump offset field in a jump instruction argument has been reduced. This makes theEXTENDED_ARGinstructions are now more prevalent in jump instruction; previously they had been rare. Perhaps to compensate for the additionalEXTENDED_ARGinstructions, additional jump optimization ...
codes.update(cc+c for c in A_Z) elif len(cc) == 2 and all(c in A_Z for c in cc): codes.add(cc) else: msg = 'rech CC argument must be A ot Z or AA to ZZ' raise ValueError('*** Usage error: ' + msg) # 返回数据列表 return sorted(codes)[:limit] def process_args(...
codes[node.char] = code else: traverse(node.left, code + '0') traverse(node.right, code + '1') traverse(root, '') return codes def encode(text, codes): encoded_text = '' for char in text: encoded_text += codes[char]
CPython 3.7 solved it by introducing new opcodes that deal with calling methods without creating the temporary method objects. This is used only when the accessed function is actually called, so the snippets here are not affected, and still generate methods :)...
In this case, we are asking it to display an error, and Python will assume it should return a code of 1 (error encountered) since we have done this. We can use any number in this function if we want to make custom error codes. Once we have assigned our remaining list items into ...