which such objects are ordered is random but will always be consistent. when any one operand is a complex number, the, =, > , and > = operators throw TypeError exception. Non-identical instances of a class are typically not equal unless the class defines the __eq__ () or __cmp__ () method.An instance of a class cannot typically be sorted with other instances of the same class or other types of objects unless the class defines a sufficiently rich comparison method (__ge__ (),__le__ (),__gt__
Python Matplotlib library Getting Started Guide, matplotlib Getting Started Guide
Introduction to Matplotlib
Matplotlib is a Python toolbox for data visualization in scientific computing. With it, Python can plot a variety of data graphics, such as Matlab and Ave ave. At first, it imitated the Matlab graphical commands
PyQuery is a Python library similar to jQuery. it can also be said that it is implemented by jQuery in Python. it can use jQuery syntax to parse HTML documents. it is easy to use and fast to parse. for example
The code is as follows:
Director: Tom tykwe/Larna vdrosky/Andy vdroskskiScriptwriter: Tom ticwe/Andy wozowski/Larna wojoskyStarring: tom Hanks/Haly Berr
You need to test something under fedora, so you don't want to use the python that comes with your system, you need to compile one yourself. After compiling, need to install PIP,PIP need setuptools, and setuptools need zlib library, in executing./configure--help./configure--prefix=~/.local/python2. 7 --with-zlibIt's very strange not to see the--with-zlib option, but this option is still used, and the fact is
Python install PiL (python Imaging Library) tips
[python] view plain copy could not find a version of that satisfies the requirement PIL (from versions:) No mat Ching distribution found for PiLStart with
[python] view plain copy sudo pip install PiL always prompts the abov
The Curses Library (ncurses) provides a terminal-independent approach to 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 will run on a plain text system, xterm, and other windowing console sessions, making these applications portable.Introduction Curses
Python's standard curses provides the basic interface for the common featur
Introduction to Python standard library multi-process (multiprocessing package), python multi-process
After learning about Python multi-process, we can continue to explore more advanced tools in the multiprocessing package. These tools make it easier for us to implement multi-process.
Process pool
A Process Pool can cr
. py2exe
Address: http://www.py2exe.org/
For more information, see py (Thon) to exe. You can easily package a Python script file into an executable file (*. EXE) in windows ). It packages all the script and DLL files into an EXE file, which looks the same as using VC. For Windows desktop applications, you can use this library to easily package it into an EXE file and distribute it to others.
4. Pil,
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
)
time.sleep (1)
pbar.finish ()
# 60% |################################################ ######## |
9) Colorama
When you use ProgressBar to print the log, why not add color to them! In fact, when there is a major error, it will be able to give you a quick reminder.
Colorama is easy to use. Just write it in your script and add it to the text you want to print:
Colorama-red) UUID
For me, there are only a few tools that are really needed in programming: hash, key-value pair stora
/wKiom1krk3uDvc4uAAHwAzVpCmE726.png "title=" Image013.png "alt=" Wkiom1krk3udvc4uaahwazvpcme726.png "/>5. Shelve module:python A simple storage data solution650) this.width=650; "src=" Https://s2.51cto.com/wyfs02/M02/97/3E/wKioL1krk46wY84kAABeaTQnwwc529.png "title=" Image014.png "alt=" Wkiol1krk46wy84kaabeatqnwwc529.png "/>Ten, Time module: shows the elapsed times from that to present, which can be used to calculate elapsed time or display the current time650) this.width=650; "src=" Https://s3.5
How to see where Python is installed:Enter where Python+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++PYC file:PYC is a binary fileWhen the py file is import as a module, Python is designed to improve parsing speed. A compile-like action is made on all the py files that act as modules.Python will no long
Vamei source: Http://www.cnblogs.com/vamei Welcome reprint, Please also keep this statement. Thank you!Python has a very useful standard library. The standard library will be installed in your computer along with the Python interpreter. It is a part of Python. These standard
Python standard library inspect, python standard inspect
The inspect module is used to collect python object information and obtain the parameter information of the class or function, the source code, the Parsing Stack, And the type check of the object. There are several useful methods:
Getargspec (func)
Returns an Arg
numeric Type- int, float, long, complex There are four different numeric types: ordinary integers, long integers, floating-point numbers, and complex numbers A normal integer (or short integer) is implemented using a long in C with a precision of at least 32 bits (Sys.maxint is always set to the maximum normal integer value of the current platform, and the minimum value is -sys.maxint - 1). long integers have infinite precision. floating-point numbers are usually implemented with a double in C
matplotlib Introduction
Matplotlib is a Python toolbox for data visualization of scientific calculations. With it, Python can draw a wide variety of data graphics, such as MATLAB and Octave. It was originally modeled after MATLAB graphics commands, but it was independent of MATLAB.Quickly draw 2D charts with simple interfaces in the Matplotlib
Preliminary matplotlib
The Pyplot Sub-
The graphics library in Python
According to the official website of Python 2.x, the document explains:Graphical User Interfaces with TkAndOther graphical User Interface packageIn Python 2.x, drawing-related libraries are:
Built-in graphics
A powerful library:Turn from: Public numberOne of the best places in Python is a large number of third-party libraries, with a wide range of amazing coverage. One drawback of the Python library is that the global installation is done by default. In order for each project to have a separate environment, you need to use the tool virtualenv, and then work with the P
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