quantopian python library

Recently in the Learning Python-twisted Library, before doing asynchronous concurrent programming has always been using C + +, such as the epoll mechanism under Linux, Windows IOCP mechanism, to the later used Boost::asio library, compared to the C + + The async experience on the twisted is a bit of a hindrance to my learning the

Because the python thread is basically crippled, so in order to take advantage of the machine's CPU, it will have to use many processes ...In the design of the game server, the most common way is:Hangs a front-end server dedicated to maintaining a connection to the client, and then forwards the client's request data to the backend server ...The way above is now the most orthodox ...However, because of the environmental constraints, you need to be tran

The module used to process HTTP in the Python standard library is URLLIB2, but the API is fragmented, and requests is a simpler and more user-friendly third-party library.Download with Pip:PIP Install requestsor git:git clone git://github.com/kennethreitz/requests.gitSend request:Get method>>> Import requests>>> r = Requests.get (' https://api.github.com/events ')Post method:>>> r = requests.post ("Http://h

Content Description:Using Python's ctypes and NumPy modules to invoke the finite element numerical calculation program of C/fortran mixed programming in a 32-bit or 64-bit Windows or gnu/linux systemOperating system and compilation environment:32bit Win7 + mingw32 + gcc-4.8 + msys-1.0 + python2.7 + openblas-0.2.864bit Ubuntu 1404 + gcc-4.8 + python2.7 + openblas-0.2.8Task decomposition:1, packaging finite element numerical program, generate DLL or so format;2. The

Download and introduction Address: https://twhiteman.netfirms.com/des.htmlIf you need to use DES encryption in Python, you can use Pydes library encryption directly, which provides CBC and ECB two encryption methods.1. Install under WindowsAfter download Pydes-x.x.x.zip and unzip, there is setup.py file, use the command setup.py--HELP can see the detailed use.You can use the command

uniqueness of different names in the same namespace, and the uniqueness of different namespaces, but the same name of the same namespace generates the same 's UUID. 4, Uuid4 ()--based on the random number from the pseudo-random number obtained, there is a certain repetition probability, the probability can be calculated. 5, UUID5 ()--the name-based SHA-1 hash value algorithm is the same as UUID3, the difference is using Secure Hash algorithm 1 algorithm usage: First of all,

method is seldom used in practice. 3, UUID3 ()--MD5 hash value based on name by calculating the MD5 hash of the name and namespace, it is worthwhile to ensure the uniqueness of different names in the same namespace, and the uniqueness of different namespaces, But the same name of the same namespace produces the same UUID. 4, Uuid4 ()--based on random numbers obtained by pseudo-random number, there is a certain repetition probability, the probability can be calculated out. 5, UUID5 ()--SHA-

Python brings a lightweight relational database SQLite. This database uses the SQL language. SQLite as a back-end database, you can build a Web site with Python or create tools that have data storage requirements. SQLite also has a wide range of applications in other areas, such as HTML5 and mobile terminals. The sqlite3 in the Python standard

Https://zhuanlan.zhihu.com/p/26983703?utm_source=wechat_sessionutm_medium=socialThis website details a detailed third-party library of various mainstream, non-mainstream programming languages that do quantitative trading. Each library name corresponds to a hyperlink on the GitHub site. To see the details, click directly.In order to make quantitative and convenient inspection later, the corresponding

Requests is a simple and easy-to-use HTTP library implemented by Python, which is much simpler than urllib.Because it is a third-party library, CMD installation is required before usePIP Install requestsOnce the installation is complete, import it, and normal means you can start using it.Basic usage:Requests.get () is used to request the target site, and the type

Theano is a third-party library of deep learning in Python, and today some classmates asked me how to configure it. OK, since there is demand, I spent half a day researching it and completing the configuration under Windows 32-bit and 64-bit systems. Here in the process of configuration I took a few detours, in this article I will be in the configuration process encountered problems, errors, the solution is

Python is widely used in scientific computing: computer vision, artificial intelligence, mathematics, astronomy, and so on. It also applies to machine learning and is expected. This article lists and describes the most useful machine learning tools and libraries for Python. In this list, we do not require these libraries to be written in Python, as long as there

grant, REVOKEThird, the system databaseINFORMATION_SCHEMA: Virtual library, do not occupy disk space, storage is the database startup parameters, such as user table information, column information, permission information, character information, etc. Performance_schema:mysql 5.5 started a new database: Mainly used to collect database server performance parameters, record the processing of query requests occurred in various events, locks and other phen