Python1 - Revision history

GethinWilliams: /* Interrogating a Module */

2014-10-10T15:21:17Z

Interrogating a Module

2014-10-10T13:48:57Z

Using Packages

2014-10-10T13:32:47Z

Some Suggested Exercises

2014-10-08T10:55:38Z

2014-10-08T10:53:55Z

2014-10-08T10:49:37Z

A Repository of Packages You Could Use

2014-03-31T10:04:34Z

Python as a Glue Languge

2014-01-21T13:57:59Z

Pylab and Matplotlib

2013-10-03T11:31:43Z

Pylab and Matplotlib

2013-10-03T10:56:11Z

Packages

← Older revision		Revision as of 15:21, 10 October 2014
Line 495:		Line 495:

	To find all the functions that are in a particular module, type '''dir(<modulename>)'''.		To find all the functions that are in a particular module, type '''dir(<modulename>)'''.
		+
		+	If you have the '''pip''' package installed, you can easily see which other packages are installed using '''pip list''' on the linux command line.

	==A Namespace Collision==		==A Namespace Collision==

← Older revision		Revision as of 13:48, 10 October 2014
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	(The '''random()''' function returns a randomly selected floating point number in the range [0, 1)--that is, between 0 and 1, including 0.0 but always smaller than 1.0.)		(The '''random()''' function returns a randomly selected floating point number in the range [0, 1)--that is, between 0 and 1, including 0.0 but always smaller than 1.0.)
		+
		+	==Interrogating a Module==
		+
		+	To find all the functions that are in a particular module, type '''dir(<modulename>)'''.

	==A Namespace Collision==		==A Namespace Collision==

@@ Line 174: / Line 174: @@
 =Some Suggested Exercises=
-* Calculate the volume of a sphere (Hint: 4/3*pi*r^3)
+* Calculate the volume of a sphere.  You can experiment with the following (where r needs to be set to some value):
 * Concatenate two strings
 * Write a recursive function to compute fibonacci numbers (Hint: F(n) = F(n-1) +F(n-2), F(0)=0 and F(1)=1)

@@ Line 385: / Line 385: @@
 to write to that file.
 =Object Oriented Programming in Python=
@@ Line 549: / Line 521: @@
 * There are many more examples.
 =Databases=

@@ Line 377: / Line 377: @@
 fp = open("foo.txt","w")
 </source>
 ==Command Line Parsing==
@@ Line 455: / Line 463: @@
 AttributeError: Radio instance has no attribute '__frequency'
 </pre>
 =Using Packages=
@@ Line 540: / Line 533: @@
 </source>
 =Databases=

← Older revision		Revision as of 10:49, 8 October 2014
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	Now, we've touched on a couple, but there are thousands of python packages available. Before you start writing your own function for X, check that someone hasn't contributed code for that already at http://pypi.python.org/pypi.		Now, we've touched on a couple, but there are thousands of python packages available. Before you start writing your own function for X, check that someone hasn't contributed code for that already at http://pypi.python.org/pypi.
		+
		+	'''pip''', the python package manager will look in pypi by default to install a package. You can use the '''--user''' option to install python packages in your own user space. See:
		+	* https://pip.readthedocs.org/en/latest/
		+	for more information on pip.

	=Writing Faster Python=		=Writing Faster Python=

@@ Line 468: / Line 468: @@
 * Calling Matlab from python: http://mlabwrap.sourceforge.net.
 * With SWIG you can make many bindings, including Python to C and C++: http://www.swig.org/.
-* Or if Fortran is more your cup-of-tea, you can use f2py: http://www.scipy.org/F2py.
+* Or if Fortran is more your cup-of-tea, you can use f2py: http://cens.ioc.ee/projects/f2py2e/.
 * There are many more examples.

@@ Line 826: / Line 826: @@
 <source lang="python">
 x = arange(-5,10)
 y = arange(-4,11)
 z1 = sqrt(add.outer(x**2,y**2))
 Z = sin(z1)/z1
 X, Y = meshgrid(x,y)
 plt.figure()

@@ Line 803: / Line 803: @@
 <source lang="python">
 import pylab
-from numpy import arange, pi, cos, sin
+from numpy import arange, pi, cos, sin, add, sqrt
 t = arange(0.0, 3.0, 0.01)
 c = cos(2 * pi * t)
@@ Line 826: / Line 826: @@
 <source lang="python">
->>> x = arange(-5,10)
+x = arange(-5,10)
->>> y = arange(-4,11)
+y = arange(-4,11)
->>> z1 = sqrt(add.outer(x**2,y**2))
+z1 = sqrt(add.outer(x**2,y**2))
->>> Z = sin(z1)/z1
+Z = sin(z1)/z1
->>> import matplotlib.pyplot as plt
+import matplotlib.pyplot as plt
->>> from pylab import meshgrid
+from pylab import meshgrid
->>> X, Y = meshgrid(x,y)
+X, Y = meshgrid(x,y)
->>> plt.figure()
+plt.figure()
->>> plt.contour(X,Y,Z)
+plt.contour(X,Y,Z)
->>> plt.show()
+plt.show()
 </source>

@@ Line 891: / Line 891: @@
 Google for many more examples pertaining to your favourite numerical procedure!
-=Packages=
+=A Repository of Packages You Could Use=
 Now, we've touched on a couple, but there are thousands of python packages available.  Before you start writing your own function for X, check that someone hasn't contributed code for that already at http://pypi.python.org/pypi.