quantopian python library

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Python Machine Learning Library recommendations

python is an object-oriented, interpretive computer programming language with a rich and powerful library, coupled with its simplicity, ease of learning, speed, open source free, portability, extensibility, and object-oriented features,python Become the most popular programming language of the 2017!AI is one of the most popular topics, machine learning technology

How to install a third-party Python library

Library is a generic name. the general value is used as a module in the form of files and a synthesis of packages in the form of folders. here we summarize the installation methods of third-party Python libraries, the library, which includes source code installation, package manager installation, and virtual environment-related installation, is a general name. th

Preparation for learning the python standard library

Author: vamei Source: http://www.cnblogs.com/vamei welcome reprint, please also keep this statement. Thank you! The Python standard library is powerful for python and we have already introduced it in the previous article. The standard library involves a wide range of applications, so you need to learn background k

Python uses the PIL library to blur the picture Gaussian

First, install the PILPIL is the Python Imaging library abbreviation for processing pictures. PIL has a Gaussian blur processing class, but there is a bug (the latest 1.1.7bug still exists), that is, the fuzzy radius of the dead is 2, cannot be set. On the 160th line of source imagefilter.py:So, we can change it here by ourselves OK.Project Address: http://www.pythonware.com/products/pil/Second, the revised

Getting started with Python requests library

First, the installation of requests libraryLearn more about the Requests library: http://www.python-requests.orgInstallation action:Win platform: "Run as Administrator" cmd, perform pip install requestsTo test whether the installation was successful:>>> Import requests>>> r=requests.get (' http://www.baidu.com ') >>> print (R.status_code) 200>>> R.text ' Ii. 7 main methods of requests libraryRequests.request () constructs a request that supports the

Python third-party library OPENPYXL (12)

Python third-party library (OPENPYXL)Ground weather MapThe data that is scheduled in a column or row on a worksheet can be drawn in a table. A surface chart is useful when you want to find the best combination between two sets of data. As in topographic maps, the areas represented by colors and patterns are the same ranges. By default, all surface plots are 3D. Create 2D wireframe and contour plots by setti

Python third-party library OPENPYXL (4)

Python third-party library OPENPYXL (4)Column ChartIn a histogram, the values are plotted as horizontal bars or vertical columns.Vertical, horizontal, and stacked bar charts.Note : The following settings affect different chart types1. Toggle between vertical and horizontal bar charts, set to Col or bar, respectively2. When using a stacked chart, the overlap needs to be set to 1003. If the bar is horizontal,

Python third-party library OPENPYXL (3)

Python third-party library OPENPYXL (3)Area MapAn area chart is similar to a line chart, where the area below the drawing line is populated and different variants can be obtained by setting the grouping to "standard", "stacked", or "percentstacked". Standard "is the default.Area Map fromOpenpyxlImportWorkbook fromOpenpyxl.chartImport(AreaChart, Reference, Series,) WB=Workbook () WS=wb.activerows= [ [' Nu

Python Os.path Standard library Basics Learning 1

.#dirname () returns the first part of the path, if combined with basename () to get the original path#dirname (PATH)def path (P):P= (P)For I in P:print '%15s:%s '% (I,os.path.dirname (i))The #splitext () function is similar to split (), but it decomposes the path based on the extension delimiter instead of the directory delimiterdef path (P):P= (P)For I in P:print '%15s:%s '% (I,os.path.splitext (i))#查询扩展名时, only the last occurrence of os.extsep is used, and if a file name has multiple extensio

Python standard library base mmap: memory-mapped files

. Modify a single character: obj[index] = ' A ', or change the string by slicing: [i1:i2] = ' ... '. The current file location data can be read, and Seek () is positioned to another location in the file.Memory-mapped files are created by the Mmap constructor, which differs in UNIX and Windows. Both need to provide a file descriptor. If you want to map an open Python file object, you need to use Fileno (). Or, use the Os.open () function (to return a f

Python's Dnspython Library usage guide

Installation methodwget http://www.dnspython.org/kits/1.9.4/dnspython-1.9.4.tar.gzTAR-ZXVF dnspython-1.9.4.tar.gzCD dnspython-1.9.4Python setup.py InstallBecause usually in the test dudns or Jomodns when some operations manual completion inconvenient, so need to use the script, and in Python Dnspython This is used for the DNS operation of the library is very powerful, but helpless online most of the informa

Python Library installation methods and common libraries

Python Library installation Method:Method One: setpu.py1. Download the archive package, unzip, record the following path: *:/**/....../2. Run cmd and switch to the *:/**/....../directory3. Run setup.py Build4. Then enter Python and enter the Python module to verify that the installation was successfulMethod Two:1.Win +

Python Library installation methods and common libraries

Python Library installation Method:Method One: setpu.py1. Download the archive package, unzip, record the following path: *:/**/....../2. Run cmd and switch to the *:/**/....../directory3. Run setup.py Build4. Then enter Python and enter the Python module to verify that the installation was successfulMethod Two:1.Win +

Use the Pdb library to debug Python and common commands

Everyone knows that Python is a built-in Pdb library, and it is very convenient to debug Python programs using Pdb. However, Pdb cannot be used for remote debugging and multithreading. let's take a look at how to debug Python and common commands using the Pdb library. Everyo

Python third-party library installation Tips

Pythonis an elegant language, concise grammar, powerful features. Of course, the rich third-party library, more able to accelerate the development. So the question is, how do you install these third-party libraries (packages)? There are few ways to install third-party libraries. Here are some tips. SOURCE InstallationMany third-party libraries are open source, almost all can github find the source code on or PyPI. Find the source format is probably zi

[Python & Machine Learning] Learning notes Scikit-learn Machines Learning Library

scientific computing package that contains the integrated development environment Eclipse and Python development plug-in Pydev, data interactive editing and visual Tools Spyder, It also incorporates Python's basic database NumPy and Advanced Math Library scipy, the 3D visualizer set Mayavi, the Python Interface Development L

Python uses Pymongo to manipulate the MongoDB library

Tags: Roo item ring nbsp Details Doc Sim etc text1, install python3.5If Python is not installed, you can install it directly with Yum, [Python]View PlainCopy # But the 2.6 version is installed Yum install-y python Source Installation 3.5 [Python]View PlainCopy wget https://www.python.or

How to install the Python PIL Library under Windows

Recently in the study of Liao's great Python tutorial, today just learned to "install a third-party module" chapter, the first task is to install the "PIL" library.What's a PIL library? Liao greatly told us: Python Imaging Library, which is a very powerful tool for processing images under

Compile the boost. Python Library

Take my boost1.48 as an example. Run Bootstrap. BAT to generate the boost library compilation engine b2.exe,bjam.exe (important ). The following is a batch processing program that I used to compile the boost. Python library to generate a dynamic Connection Library: @ ECHO: the pyth

Python Standard library (Introduction to various modules) __python

Python Standard Library /06/07 20:10:08 Compile 0.1. About this book 0.2. Code contract 0.3. About the example 0.4. How to contact our core Module 1.1. Introduction to 1.2. _ _builtin_ _ Module 1.3. Exceptions module 1.4. OS module 1.5. Os.path module 1.6. Stat Module 1.7. String Module 1.8. Re module 1.9. Math Module 1.10. Cmath module 1.11. Operator module 1.12. Copy module 1.13. SYS module 1.14. Atexit

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