Minimal fruit basket program with PyBrace
- From: Jamal Mazrui <empower@xxxxxxxxx>
- To: programmingblind@xxxxxxxxxxxxx
- Date: Sat, 15 Dec 2007 23:54:20 -0500 (EST)
From the archive
http://www.EmpowermentZone.com/py_fruit.zip
This fruit basket program is written in Python 2.5, available from
http://python.org
with wrappers for WxWidgets 2.8, available from
http://wxwidgets.org
I revised the original fruit basket program I did in Python to one that is
more concise and readable. The coding process benefited from a new
feature in EdSharp, available from
http://www.EmpowermentZone.com/edsetup.exe
that allows one to toggle between standard Python syntax and a pilot
variation intended to be easier for users of speech output. I call this
variation "PyBrace," since it uses curly braces instead of indentation to
denote blocks of code.
PyBrace conventions currently use an opening brace instead of a colon, and
a closing brace on a line by itself at the end of the block. In addition,
a word immediately follows the closing brace, which is the same word that
started the code block, e.g., "if" or "def."
The standard Python version also follows some conventions in order to have
a line for line equivalence with the PyBrace version. This helps one find
the line to revise when the Python interpreter produces an error message.
The Python comment symbol, #, replaces the closing brace character at the
end of a block. The word immediately after reminds a speech user what
block has ended. Using a convention of a single word after the # symbol
enables EdSharp to eliminate these comments and regenerate them each time
a conversion is done. Manually written comments that put a space after
the # symbol or involve more than one word will not be affected by the
conversion process.
In EdSharp, the PyBrace command is available on the Miscellaneous menu, or
via the Alt+Shift+LeftBracket hot key. It converts either all or selected
text to PyBrace format, coming from general Python or PyDent format. The
PyDent command, Alt+LeftBracket, does the reverse, converting to PyDent
from PyBrace.
For comparison, below is the PyBrace followed by PyDent version -- the
latter being the one to run as a command-line argument with the Python
interpreter.
Jamal
# Begin content of py_fruit.pyb
# Fruit Basket program in PyBrace with WxWidgets
# Public domain by Jamal Mazrui
import wx
def Add_Click(self){
sFruit = txtFruit.GetValue()
if len(sFruit ) == 0{
wx.MessageBox("No fruit to add!", "Alert")
}if
else{
lstBasket.Append(sFruit)
iFruit = lstBasket.GetCount() - 1
lstBasket.SetSelection(iFruit)
txtFruit.Clear()
}else
}def
def Delete_Click(self){
iFruit = lstBasket.GetSelection()
if iFruit == -1{
wx.MessageBox("No fruit to delete!.", "Alert")
}if
else{
lstBasket.Delete(iFruit)
if iFruit == lstBasket.GetCount(): iFruit = iFruit - 1
lstBasket.SetSelection(iFruit)
}else
}def
def FruitBasket_Close(self){
if wx.MessageBox("Exit program?", "Confirm", wx.YES_NO) == wx.YES :
dlg.Destroy()
}def
# Main program
app = wx.PySimpleApp()
dlg = wx.Dialog(None, -1, "Fruit Basket")
sizer = wx.FlexGridSizer(cols=3, hgap=6, vgap=8)
lblFruit = wx.StaticText(dlg, -1, "&Fruit:")
sizer.Add(lblFruit)
txtFruit = wx.TextCtrl(dlg)
sizer.Add(txtFruit)
btnAdd = wx.Button(dlg, -1, "&Add")
sizer.Add(btnAdd)
lblBasket = wx.StaticText(dlg, -1, "&Basket:")
sizer.Add(lblBasket)
lstBasket = wx.ListBox(dlg)
sizer.Add(lstBasket)
btnDelete = wx.Button(dlg, -1, "&Delete")
sizer.Add(btnDelete)
btnAdd.SetDefault()
dlg.Bind(wx.EVT_BUTTON, Add_Click, btnAdd)
dlg.Bind(wx.EVT_BUTTON, Delete_Click, btnDelete)
dlg.Bind(wx.EVT_CLOSE, FruitBasket_Close, dlg)
dlg.SetSizerAndFit(sizer)
dlg.Show()
app.MainLoop()
# End of py_fruit.pyb
# Begin content of py_fruit.py
# Fruit Basket program in PyDent with WxWidgets
# Public domain by Jamal Mazrui
import wx
def Add_Click(self):
sFruit = txtFruit.GetValue()
if len(sFruit ) == 0:
wx.MessageBox("No fruit to add!", "Alert")
#if
else:
lstBasket.Append(sFruit)
iFruit = lstBasket.GetCount() - 1
lstBasket.SetSelection(iFruit)
txtFruit.Clear()
#else
#def
def Delete_Click(self):
iFruit = lstBasket.GetSelection()
if iFruit == -1:
wx.MessageBox("No fruit to delete!.", "Alert")
#if
else:
lstBasket.Delete(iFruit)
if iFruit == lstBasket.GetCount(): iFruit = iFruit - 1
lstBasket.SetSelection(iFruit)
#else
#def
def FruitBasket_Close(self):
if wx.MessageBox("Exit program?", "Confirm", wx.YES_NO) == wx.YES
: dlg.Destroy()
#def
# Main program
app = wx.PySimpleApp()
dlg = wx.Dialog(None, -1, "Fruit Basket")
sizer = wx.FlexGridSizer(cols=3, hgap=6, vgap=8)
lblFruit = wx.StaticText(dlg, -1, "&Fruit:")
sizer.Add(lblFruit)
txtFruit = wx.TextCtrl(dlg)
sizer.Add(txtFruit)
btnAdd = wx.Button(dlg, -1, "&Add")
sizer.Add(btnAdd)
lblBasket = wx.StaticText(dlg, -1, "&Basket:")
sizer.Add(lblBasket)
lstBasket = wx.ListBox(dlg)
sizer.Add(lstBasket)
btnDelete = wx.Button(dlg, -1, "&Delete")
sizer.Add(btnDelete)
btnAdd.SetDefault()
dlg.Bind(wx.EVT_BUTTON, Add_Click, btnAdd)
dlg.Bind(wx.EVT_BUTTON, Delete_Click, btnDelete)
dlg.Bind(wx.EVT_CLOSE, FruitBasket_Close, dlg)
dlg.SetSizerAndFit(sizer)
dlg.Show()
app.MainLoop()
# End of py_fruit.py
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