quantopian python library

Python standard library: built-in function any (iterable), pythoniterable If one of all elements of an object that can be iterated is True, True is returned. Otherwise, False is returned. Or if the iteratable object is null, False is returned. This function is mainly used to determine whether the list, tuples, dictionaries, and other objects have elements that are True, improving the computing speed. The eq

Pyexiv2 is the python binding of the Exiv2 library, and Exiv2 is a C + + library for manipulating Exif, IPTC, and XMP picture metadata. For PYEXIV2, please check its official website: http://tilloy.net/dev/pyexiv2/ At present, Pyexiv2 seems to have not supported Python3, this article is used to do the Python2.7 experiment. The command to install Pyexiv2 in Ubuntu

In this article we will start to learn how to crawl Web pages, for more information, please refer to: Python Learning Guide Basic use of the URLLIB2 libraryThe so-called Web crawl, is the URL address specified in the network resources from the network stream read out, save to Local. There are many libraries in python that can be used to crawl Web pages, and we'll learn first urllib2 . URLLIB2

used in the OS and Os.path modules.List files and process paths(1) Import the OS and Os.path modules in the Python interpreter:>>>Import os, Os.path(2) First look at which file system you are running>>>os.getcwd ()'c:\\python31'(3) If you want to work with a program, you can split it into a tuple of paths(4) In order to find some information about the directory or any file of interest, use Os.start:Note: The name is "." Directory is a simple represe

Mako is a high-performance Python template library, and its syntax and APIs draw on a number of other template libraries, such as Django, JINJA2, and so on.Basic Usage The most basic way to create a template and render it is to use the Template class: From mako.template import Template t = template (' Hello world! ') Print T.render () Text parameters passed to Template are compiled into a

Python uses the arrow library to handle time data in an elegant manner. Preface We should all know that we have to deal with time in many times, but the time processing module in the Python standard library is actually not very friendly. Why do I say this? Because I believe that most people query documents almost every

When I met one of SimPy's founder Klaus Miller, I learned about the bag from him. Dr. Miller has read several lovely Python columns that suggest techniques for using Python 2.2+ generators to implement semi-collaborative routines and "lightweight" threading. In particular (which I am pleased with), he found these techniques useful when implementing Simula-67 style simulations in

The Curses Library (ncurses) provides a terminal-independent method for controlling character screens. Curses is a standard part of most UNIX-like systems, including Linux, and it has been ported to Windows and other systems. The curses program runs on plain text systems, xterm, and other windowing console sessions, making these applications well-portable. Introduction Curses Python's standard curses provides the "glass telex" (Glass teletype) (in t

Tutorial on installing Python's Pillow library on Mac OS, pythonpillow Today, I made a python tool for my friend and found that the ptyhon support library is missing in the system. The following information is returned: ImportError: No module named PILThen download and install it. Because there is no python management

The previous time item needs to have some pictures to draw water to print, uses the Python PIL library, this article takes the Imaging-1.1.7 as an example, records the PIL library The source code compiles/installs the procedure.PIL full name Python image Library, it supports

Python System Operations Common Library1. Psutil is a cross-platform library (http://code.google.com/p/psutil/)It is able to achieve the process and system utilization (memory, CPU, disk, network, etc.) of system running, which is mainly used for system monitoring, analysis and management of system resources and processes.2, IPy (http://github.com/haypo/python-ip

Whether you're writing a custom label or a filter, the first thing to do is create a template library (the basic structure that Django can import). Creating a template Library is a two-step walk: First, decide which Django application the template Library should be placed in. If you create an app from manage.py Startapp, you can put it there, or you can create a

More and more data scientists have been using Python recently, and I can't help but think that although they have benefited from the libraries of Pandas, Scikit-learn and NumPy, they may have missed some of the older but equally helpful python libraries. In this blog post, I will recommend some little-known libraries. Even if you're a Python whiz, you should tak

This article briefly describes the installation of the Python drawing library matplotlib, as follows: Matplotlib is Python's most famous drawing library, which provides a complete set of command APIs similar to those of MATLAB, and is ideal for interactiveFor mapping. Matplotlib installation can be found at: Website Link http://matplotlib.org/users/installing.ht

Python zxing library parsing (barcode QR code identification), pythonzxingVarious code scanning software I recently want to build a QR code recognition project. I found that there are many open-source and non-open-source software for QR code recognition. Http://www.oschina.net/project/tag/238/Zbar First, I tried Zbar. Various errors are reported when python loads

Python django requires us to learn related technologies during continuous construction. Next, let's take a detailed look at the specific content. Recently, I have encountered many difficulties in learning the python django WEB development framework. I would like to review it here. Maybe you are worried about these problems? When using the NetBeans for python dja

1 PrefaceThe use of the Pickle library is mentioned in the article "Understanding what is machine learning through a simple example", which is described in this paper. A simple example to understand what machine learning is Pickle is a standard module in the Python language, and after installing Python, the Pickle

Python standard library 14 database (SQLITE3)Vamei Source: Http://www.cnblogs.com/vamei Welcome reprint, Please also keep this statement. Thank you!Python comes with a lightweight relational database, SQLite. This database uses the SQL language. As a back-end database, SQLite can be used with Python to build websites o

change python pip download source changed to domesticTemporary use: Tsinghua Mirror source Https://pypi.tuna.tsinghua.edu.cn/simpleYou can add the parameter-I https://pypi.tuna.tsinghua.edu.cn/simple when using PIPFor example: Pip install-i https://pypi.tuna.tsinghua.edu.cn/simple Pustil, this will be from the Tsinghua side of the mirror to install the Pustil library.You can also specify the module version to be installed, such as Django pip install

This article mainly introduces the Python standard library of the SYS module, this article explains the use of the SYS module to obtain the parameters of the script, processing modules, using the SYS module to operate the module search path, using the SYS module to find the built-in modules, using the SYS module to find imported modules, and other use cases, Need friends can refer to the following The SYS