python - 随笔分类(第11页) - papering

python login form

摘要：import time from selenium import webdriver browser = webdriver.Chrome() wait_time = 1 USER = 'xl.feng' PWD = 'fengxiaole' seed_url = 'http://xx.com/login.jhtml' browser.get(seed_url) # time.sleep... 阅读全文

posted @ 2017-08-16 19:36 papering 阅读(341) 评论(0) 推荐(0)

from scipy import integrate

摘要：from scipy import integrate 阅读全文

posted @ 2017-08-09 22:11 papering 阅读(295) 评论(0) 推荐(0)

yum python mysql

摘要：en.wikipedia.org/wiki/Yum_(.rpm) The Yellowdog Updater, Modified (yum) is an open-source command-line package-management utility for computers running 阅读全文

posted @ 2017-07-31 14:01 papering 阅读(384) 评论(0) 推荐(0)

from multiprocessing import cpu_count

摘要：w 阅读全文

posted @ 2017-07-26 21:41 papering 阅读(349) 评论(0) 推荐(0)

python 虚拟机是单线程；当线程执行I/O密集型操作是，ce

摘要：python 虚拟机是单线程；当线程执行I/O密集型操作是单核CPU，不存在“并行”，与语言无关：每个线程运行中，其他线程等待该线程让步粗粒度的并行靠软件，细硬阅读全文

posted @ 2017-07-10 22:43 papering 阅读(234) 评论(0) 推荐(0)

peewee sqlalchemy

摘要：w 阅读全文

posted @ 2017-06-13 17:11 papering 阅读(219) 评论(0) 推荐(0)

Python的交互模式和直接运行.py文件有什么区别

摘要：使用文本编辑器 - 廖雪峰的官方网站 https://www.liaoxuefeng.com/wiki/1016959663602400/1017024645952992 直接输入python进入交互模式，相当于启动了Python解释器，但是等待你一行一行地输入源代码，每输入一行就执行一行。直接运阅读全文

posted @ 2017-06-13 16:09 papering 阅读(440) 评论(0) 推荐(0)

ImportError: libsybdb.so.5: cannot open shared object file: No such file or directory pymssql linux 问题解决搭建驱动

摘要：[root@hadoop1 nlp]# python sqlserver_t.py Traceback (most recent call last): File "sqlserver_t.py", line 1, in <module> import pymssqlImportError: lib 阅读全文

posted @ 2017-06-12 17:26 papering 阅读(1461) 评论(0) 推荐(0)

python的final class

摘要：https://zhuanlan.zhihu.com/p/31674972 https://rainmanwy.github.io/Python的final-Class/ 阅读全文

posted @ 2017-06-12 16:47 papering 阅读(230) 评论(0) 推荐(0)

scrapy xpath xpath('---').xpath('string(.)') 提取子元素全部文本 js 获取文本

摘要：js 获取文本 //获取标签机器子标签的所有文本内容 var box = document.getElementById('box'); var box2 = box.innerText; console.log(box2); product.xpath("div//div[@class='a-ro 阅读全文

posted @ 2017-06-09 17:39 papering 阅读(580) 评论(0) 推荐(0)

scipy

摘要：scipy 阅读全文

posted @ 2017-06-08 23:45 papering 阅读(164) 评论(0) 推荐(0)

python比C程序相比非常慢

摘要：w http://www.liaoxuefeng.com/wiki/001374738125095c955c1e6d8bb493182103fac9270762a000/0013747381369301852037f35874be2b85aa318aad57bda000 第一个缺点就是运行速度慢，和阅读全文

posted @ 2017-06-08 22:44 papering 阅读(564) 评论(0) 推荐(0)

if isinstance(obj, int):

摘要：http://legacy.python.org/dev/peps/pep-0008/ Object type comparisons should always use isinstance() instead of comparing types directly. When checking 阅读全文

posted @ 2017-06-08 18:30 papering 阅读(625) 评论(0) 推荐(0)

''.startswith() and ''.endswith() instead of string slicing to check for prefixes or suffixes.

摘要：w http://legacy.python.org/dev/peps/pep-0008/ Yes: if foo.startswith('bar'):No: if foo[:3] == 'bar': 阅读全文

posted @ 2017-06-08 18:29 papering 阅读(156) 评论(0) 推荐(0)

threading.get_ident()

摘要：https://docs.python.org/3/library/threading.html Return the ‘thread identifier’ of the current thread. This is a nonzero integer. Its value has no dir 阅读全文

posted @ 2017-06-05 22:03 papering 阅读(607) 评论(0) 推荐(0)

selenium webdriver (python)

摘要：import os, sys os_sep = os.sep base_dir = os.path.dirname(os_sep.join(os.path.abspath(__file__).split(os_sep)[0: 2])) sys.path.append(base_dir) from c 阅读全文

posted @ 2017-06-01 21:06 papering 阅读(203) 评论(0) 推荐(0)

向同一个模型的外键反向关联名称产生了冲突 Django迁移

摘要：向同一个模型的外键反向关联名称产生了冲突一个模型中有两个外键指向同一张表时，创建迁移模型时报错：“ HINT: Add or change a related_name argument to the definition for 'AnswersModel.author' or 'Answers 阅读全文

posted @ 2017-05-17 19:59 papering 阅读(256) 评论(0) 推荐(0)

isinstance(object, classinfo) class type(name, bases, dict)

摘要：w https://docs.python.org/3/library/functions.html#isinstance 阅读全文

posted @ 2017-05-10 11:37 papering 阅读(160) 评论(0) 推荐(0)

函数式编程偏函数生成器 yeild checkpoint() 调试反省

摘要：import inspect def checkpoint(): '''Instrumented `yield checkpoint()` goes here''' f = inspect.stack()[1].frame # stack[1] is the caller of checkpoint 阅读全文

posted @ 2017-05-10 11:29 papering 阅读(204) 评论(0) 推荐(0)

__main__ — Top-level script environment

摘要：w 29.4. __main__ — Top-level script environment — Python 3.6.1 documentation https://docs.python.org/3/library/__main__.html D:\pyTOgo\mongoTrans.py 阅读全文

posted @ 2017-05-09 20:38 papering 阅读(223) 评论(0) 推荐(0)

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随笔分类 - python