Tools/Python Tools

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== Modules ==
  
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[http://www.python.org/ Python] can be used to achieve results similar to [[Tools/Octave_Matlab|Octave or Matlab]], but with the advantages of a fundamentally object-oriented general-purpose language. 
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For our scientific purposes we use following modules regularly:
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Additionally to numerical computation, packages allow to [http://docs.scipy.org/doc/scipy/reference/tutorial/linalg.html solve linear systems].
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Numerical computation with [http://www.python.org/ Python] mainly bases on the following libraries:
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[http://www.scipy.org/PyLab PyLab] is an effort to consolidate following libraries together with [http://ipython.org/ IPython] into a ''compelling environment for numerical computation'':
 
* [http://www.numpy.org/ NumPy] for arrays, linear algebra, ...
 
* [http://www.numpy.org/ NumPy] for arrays, linear algebra, ...
 
* [http://www.scipy.org/ SciPy] depends on [http://www.numpy.org/ NumPy], used to manipulate numbers, for signal processing, ...
 
* [http://www.scipy.org/ SciPy] depends on [http://www.numpy.org/ NumPy], used to manipulate numbers, for signal processing, ...
 
* [http://matplotlib.org/ matplotlib] for 2D plots
 
* [http://matplotlib.org/ matplotlib] for 2D plots
  
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[http://www.scipy.org/PyLab PyLab] integrates these 3 libraries.
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Symbolic mathematics can be done with:
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* [http://sympy.org/en/index.html SymPy]
  
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The [https://code.google.com/p/spyderlib/ Spyder IDE] provides a MATLAB-like development interface.
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== IDEs ==
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The [https://code.google.com/p/spyderlib/ Spyder IDE] provides a complete MATLAB-like development interface.
 
As a simple alternative, [http://ipython.org/ IPython] provides a web-based GUI and Mathematica-like notebooks.
 
As a simple alternative, [http://ipython.org/ IPython] provides a web-based GUI and Mathematica-like notebooks.
  
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=== Mac OS ===
 
=== Mac OS ===
  
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Donload [https://code.google.com/p/spyderlib/downloads/list Spyder].
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Download [https://code.google.com/p/spyderlib/downloads/list Spyder].
 
Copy the application to the <code>Applications</code> folder.
 
Copy the application to the <code>Applications</code> folder.
  
 
Launch <code>Spyder</code>, and in the console type:
 
Launch <code>Spyder</code>, and in the console type:
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t = linspace(0, 10, 100);
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<source lang="Python">
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plot(t, sin(t));
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t = linspace(0, 10, 100);
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plot(t, sin(t));
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</source>
  
 
=== Linux ===
 
=== Linux ===
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Install the IDE:
 
Install the IDE:
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sudo apt-get install spyder
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<source lang="Python">
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sudo apt-get install spyder
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</source>
  
 
This also installs <code>numPy</code>, <code>sciPy</code> and <code>matplotlib</code>.
 
This also installs <code>numPy</code>, <code>sciPy</code> and <code>matplotlib</code>.
  
 
Launch <code>Spyder</code>, and in the console type:
 
Launch <code>Spyder</code>, and in the console type:
−
t = linspace(0, 10, 100);
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<source lang="Python">
−
plot(t, sin(t));
+
t = linspace(0, 10, 100);
 +
plot(t, sin(t));
 +
</source>
  
 
=== Windows ===
 
=== Windows ===
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Download [https://code.google.com/p/pythonxy/ Python(x,y)] to install [http://www.python.org/ Python] and other components of your choice.
 
Download [https://code.google.com/p/pythonxy/ Python(x,y)] to install [http://www.python.org/ Python] and other components of your choice.
  
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==== Python(x,y) 2.7.3.1 ====
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==== [https://code.google.com/p/pythonxy/ Python(x,y)] 2.7.3.1 ====
  
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During the installation make sure to have ''pip'' selected in the list of available ''Python'' modules.
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In the ''Choose Components'' window of the installation make sure to have ''Python''->''Pip'' selected. ''Pip'' is needed to do the upgrades of the packages as described below. Select also ''Python''->''SymPy'' if you need it. Additional modules can easily be added later by re-running the installer and selecting the desired module(s).
  
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===== Spyder IDE =====
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===== [http://code.google.com/p/spyderlib/ Spyder] IDE =====
  
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Spyder ('''S'''cientific '''PY'''thon '''D'''evelopment '''E'''nvi'''R'''onment) is an IDE similar to the one you get with Matlab or Octave. This means you get an editor, a console, online help, variable explorer and much more. With ''Python(x,y) 2.7.3.1'' you get
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[http://code.google.com/p/spyderlib/ '''S'''cientific '''PY'''thon '''D'''evelopment '''E'''nvi'''R'''onment] is an IDE similar to the one you get with Matlab or Octave. This means you get an editor, a console, online help, variable explorer and much more.
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''Spyder v. 2.1.11''. We recommend however to upgrade to the newest version.
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First you have to remove the old one first.  
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With ''[https://code.google.com/p/pythonxy/ Python(x,y)] 2.7.3.1'' you get ''[http://code.google.com/p/spyderlib/ Spyder]v. 2.1.11''. We recommend however to upgrade to the newest version.
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If you installed [https://code.google.com/p/pythonxy/ Python(x,y)] correctly the commands below should work in any console. If [https://github.com/pypa/pip#readme pip] is an unknown command, make sure that you have ''C:\Python27\Scripts'' in the ''Path'' environment variable.
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 +
First you have to remove the old [http://code.google.com/p/spyderlib/ Spyder] first
  
 
<source lang='DOS'>
 
<source lang='DOS'>
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</source>
 
</source>
  
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and then install the newest ''Spyder'' (at the time of writing this: v. 2.2.0rc) with
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and then install the newest version (at the time of writing this: v. 2.2.0) with
  
 
<source lang='DOS'>
 
<source lang='DOS'>
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== Modules ==
 
== Modules ==
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=== Pip ===
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[https://github.com/pypa/pip#readme pip] is a tool for installing and managing [http://www.python.org/ Python] packages.
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[http://www.pip-installer.org/en/latest/ pip Documentation]
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=== NumPy ===
 
=== NumPy ===
  
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['''Num'''erical '''Py'''thon]
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[http://www.numpy.org/ '''Num'''erical '''Py'''thon]
  
 
[http://docs.scipy.org/doc/numpy/reference/ NumPy Reference Documentation]
 
[http://docs.scipy.org/doc/numpy/reference/ NumPy Reference Documentation]
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=== SymPy ===
 
=== SymPy ===
  
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[http://docs.sympy.org/ '''Sym'''bolic Mathematics with '''Py'''thon]
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[http://sympy.org/en/index.html '''Sym'''bolic Mathematics with '''Py'''thon]
  
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Try out [http://live.sympy.org/ SymPy Live] directly in your browser to get a feeling of it.
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Try out [http://live.sympy.org/ SymPy Live] directly in your browser to get a feeling of it or read through the [http://docs.sympy.org/0.7.2/index.html documentation.
  
 
[[Category:Install]] [[Category:Python]]
 
[[Category:Install]] [[Category:Python]]

Revision as of 10:40, 8 May 2013

Contents

Modules

For our scientific purposes we use following modules regularly:

PyLab is an effort to consolidate following libraries together with IPython into a compelling environment for numerical computation:

  • NumPy for arrays, linear algebra, ...
  • SciPy depends on NumPy, used to manipulate numbers, for signal processing, ...
  • matplotlib for 2D plots

Symbolic mathematics can be done with:

IDEs

The Spyder IDE provides a complete MATLAB-like development interface. As a simple alternative, IPython provides a web-based GUI and Mathematica-like notebooks.

Installation

Mac OS

Download Spyder. Copy the application to the Applications folder.

Launch Spyder, and in the console type: 

t = linspace(0, 10, 100);
plot(t, sin(t));

Linux

Installation can be done on a package basis, with pip. An alternative would be easy_install.

Install the IDE: 

sudo apt-get install spyder

This also installs numPy, sciPy and matplotlib.

Launch Spyder, and in the console type: 

t = linspace(0, 10, 100);
plot(t, sin(t));

Windows

Download Python(x,y) to install Python and other components of your choice.

Python(x,y) 2.7.3.1

In the Choose Components window of the installation make sure to have Python->Pip selected. Pip is needed to do the upgrades of the packages as described below. Select also Python->SymPy if you need it. Additional modules can easily be added later by re-running the installer and selecting the desired module(s).

Spyder IDE

Scientific PYthon Development EnviRonment is an IDE similar to the one you get with Matlab or Octave. This means you get an editor, a console, online help, variable explorer and much more.

With Python(x,y) 2.7.3.1 you get Spyderv. 2.1.11. We recommend however to upgrade to the newest version.

If you installed Python(x,y) correctly the commands below should work in any console. If pip is an unknown command, make sure that you have C:\Python27\Scripts in the Path environment variable.

First you have to remove the old Spyder first 

pip uninstall spyder

and then install the newest version (at the time of writing this: v. 2.2.0) with 

pip install spyder

Modules

Pip

pip is a tool for installing and managing Python packages.

pip Documentation


NumPy

Numerical Python

NumPy Reference Documentation

Download NumPy

SciPy

Scientific Library for Python

SciPy Reference Documentation

Download SciPy

matplotlib

Install the newest version (v1.2.1 is NOT recommended) of matplotlib

Check out the Usage FAQ: Coding Styles for a short introduction to plotting with matplotlib. For full documentation go to the API documentation.

SymPy

Symbolic Mathematics with Python

Try out SymPy Live directly in your browser to get a feeling of it or read through the [http://docs.sympy.org/0.7.2/index.html documentation.

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