而素数的批量计算,比较快的方法就是筛法(sieve method)。在 sympy 中,同样有 sympy.sieve 这个工具,用于计算素数。如果想输出前100个素数,那么 >>> sympy.sieve._reset() >>> sympy.sieve.extend_to_no(100) >>> sympy.sieve._list array('l', [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31,...
# -*- coding: UTF-8 -*- import sys from primer import sieveOfEratosthenes def main(argv): result=sieveOfEratosthenes(int(argv[1])) print(argv[1]+"以内有"+str(len(result))+"个质数") return 0 if __name__=='__main__': main(sys.argv) 现在去执行rpython编译后的C程序,primer-c...
题目 from random import choice from Crypto.Util.number import isPrime, sieve_base as primes from flag import flag def getPrime(bits): while True: n = 2 while n.bit_length() < bits: n *= choice(primes) if isPrime(n + 1): return n + 1 e = 0x10001 m = int.from_bytes(flag.enco...
(4.8.0) Requirement already satisfied: soupsieve>=1.2 in d:\lib\site-packages (from beautifulsoup4) (1.9.3) idle很不给面子 >>> import beautifulsoup4 Traceback (most recent call last): File "<pyshell#0>", line 1, in <module> import beautifulsoup4 ModuleNotFoundError: No module named ...
请注意,这些示例是用python2编写的,可能需要一些调整才能在python3下运行。 1 line : Output 输出 print 'Hello, world!' 1. 2 lines : Input 输入, assignment 赋值 name = raw_input('What is your name?\n') print 'Hi, %s.' % name
sys.base_prefix will hold the path to the Python executable used to create this virtual environment, which you can find at the path defined under the home key in pyvenv.cfg. sys.prefix will point to the directory containing pyvenv.cfg. If the interpreter doesn’t find a pyvenv.cfg file,...
sieve(size): 3 sieve= [True] * size 4 sieve[0] = False 5 sieve[1] = False 6 for i in range(2, int(math.sqrt(size)) + 1): 7 k= i * 2 8 while k size: 9 sieve[k] = False 10 k += i 11 return sum(1 for x in sieve if x) 12 print(sieve(10000000000)) 正确答案...
011 Collecting soupsieve>1.2 (from beautifulsoup4) Downloading https://pypi.tuna.tsinghua.edu.cn/packages/36/69/d82d04022f02733bf9a72bc3b96332d360c0c5307096d76f6bb7489f7e57/soupsieve-2.2.1-py3-none-any.whl Installing collected packages: soupsieve, beautifulsoup4 Successfully installed beautifulsoup...
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当Anaconda或者Miniconda安装好了,且在~/.bashrc或~/.bash_profile或~/.zshrc环境变量配置文件中添加了Python3.6+的路径了,就可以使用了,这也是一个最基本的Base开发环境。 主要是基于macOS这个平台为例来说一下(Win/Linux类似): 1.创建新的开发环境