Added demo-exercizer.py file.

docs/examples/core/demo-exercizer.py

@@ -0,0 +1,74 b''
+from IPython.demo import Demo,IPythonDemo,LineDemo,IPythonLineDemo,ClearDemo,ClearIPDemo
+import tempfile, os, StringIO, shutil
+
+"""This is meant to be run from the IPython prompt:
+run demo-exercizer.py
+-- it will created demo objects of the example that is
+embedded in demo.py in a number of ways and allow you
+to see how they work, just follow the printed directions."""
+
+example1 = """
+'''A simple interactive demo to illustrate the use of IPython's Demo class.'''
+
+print 'Hello, welcome to an interactive IPython demo.'
+
+# The mark below defines a block boundary, which is a point where IPython will
+# stop execution and return to the interactive prompt. The dashes are actually
+# optional and used only as a visual aid to clearly separate blocks while
+# editing the demo code.
+# <demo> stop
+
+x = 1
+y = 2
+
+# <demo> stop
+
+# the mark below makes this block as silent
+# <demo> silent
+
+print 'This is a silent block, which gets executed but not printed.'
+
+# <demo> stop
+# <demo> auto
+print 'This is an automatic block.'
+print 'It is executed without asking for confirmation, but printed.'
+z = x+y
+
+print 'z=',x
+
+# <demo> stop
+# This is just another normal block.
+print 'z is now:', z
+
+print 'bye!'
+"""
+fp = tempfile.mkdtemp(prefix = 'DemoTmp')
+fd, filename = tempfile.mkstemp(prefix = 'demoExample1File', suffix = '.py', dir = fp)
+f = os.fdopen(fd, 'wt')
+
+f.write(example1)
+f.close()
+
+my_d = Demo(filename)
+my_cd = ClearDemo(filename)
+
+fobj = StringIO.StringIO(example1)
+str_d = Demo(fobj, title='via stringio')
+#~ def tmpcleanup():
+    #~ global my_d, my_cd, fp
+    #~ del my_d
+    #~ del my_cd    
+    #~ shutil.rmtree(fp, False)
+
+print '''
+The example that is embeded in demo.py file has been used to create 
+the following 3 demos, and should now be available to use:
+   my_d()    -- created from a file
+   my_cd()   -- created from a file, a ClearDemo
+   str_d()   -- same as above, but created via a stringi\o object 
+Call by typing their name, (with parentheses), at the 
+ipython prompt, interact with the block, then call again
+to run the next block.
+'''
+# call tmpcleanup to delete the temporary files created. -not implemented
+