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pbr的介绍不多,http://ju.outofmemory.cn/entry/156745 $ mkdir entry_test; cd entry_test; git init $ mkdir  -p mypackage/api/v1/ $ touch mypackage/__init__.py; touch mypackage/api/__init__.py; touch mypackage/api/v1/__init__.py; $ tree mypackage .├── mypacka…
使用Storyboard时出现以下警告: warning: Unsupported Configuration: Scene is unreachable due to lack of entry points and does not have an identifier for runtime access via -instantiateViewControllerWithIdentifier:. 这个警告一般出现在你往 Storyboard 拖了一个控制器, 但是没有连线到, 就会提示,…
python多线程简单例子 作者:vpoet mail:vpoet_sir@163.com import thread def childthread(threadid): print "I am child thread",threadid def parentthread(): i=0 while 1: i+=1 thread.start_new_thread(childthread,(i,)) if raw_input()=='q': break parentthread() 运…
Python 发邮件例子 例子 #!/usr/bin/env python # -*- coding: utf-8 -*- # @Date : 2019-04-23 16:12:33 # @Author : BenLam # @Link : https://www.cnblogs.com/BenLam/ import smtplib from email.mime.text import MIMEText from email.header import Header from email.mi…
python gevent使用例子 from gevent.pool import Pool POOL_SIZE = 100 def process(func, param1_list, param2_list) stat = {} pool = Pool(POOL_SIZE) results = pool.imap_unordered(func, param1_list, param2_list) pool.join() # 处理结果 for value in results: stat.up…
使用Storyboard时出现以下警告: warning: Unsupported Configuration: Scene is unreachable due to lack of entry points and does not have an identifier for runtime access via -instantiateViewControllerWithIdentifier:. 大意是为了在程序中动态访问Scene,需要给其设置一个Storyboard ID,所以给出了…
Unsupported Configuration: “View Controller” is unreachable because it has no entry points, and no identifier for runtime access via -[UIStoryboard instantiateViewControllerWithIdentifier:]. 直译:不支持的设置:"View Controller"是不能被取到的,因为它没有程序入口指针,也没有标识符以…
最近用到随机数,就查询资料总结了一下Python random模块(获取随机数)常用方法和使用例子. 1.random.random  random.random()用于生成一个0到1的随机符点数: 0 <= n < 1.0 2.random.uniform random.uniform(a, b),用于生成一个指定范围内的随机符点数,两个参数其中一个是上限,一个是下限. 如果a < b,则生成的随机数n: b>= n >= a. 如果 a >b,则生成的随机数n: a…
61.打印出杨辉三角形. #python3.7 from sys import stdout if __name__ == '__main__': a = [] for i in range(10): a.append([]) for j in range(10): a[i].append(0) for i in range(10): a[i][0] = 1 a[i][i] = 1 for i in range(2,10): for j in range(1,i): a[i][j] = a[i…
55.学习使用按位取反~. 程序分析:~0=1; ~1=0; (1)先使a右移4位. (2)设置一个低4位全为1,其余全为0的数.可用~(~0<<4) (3)将上面二者进行&运算. #python3.7 if __name__ == '__main__': a = 234 b = ~a print('The a\'s 1 complement is %d' % b) a = ~a print('The a\'s 2 complement is %d' % a) 56.画图,学用circ…