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<?xml version='1.0'?>
<!DOCTYPE sconsdoc [
<!ENTITY % scons SYSTEM "../scons.mod">
%scons;
<!ENTITY % builders-mod SYSTEM "../generated/builders.mod">
%builders-mod;
<!ENTITY % functions-mod SYSTEM "../generated/functions.mod">
%functions-mod;
<!ENTITY % tools-mod SYSTEM "../generated/tools.mod">
%tools-mod;
<!ENTITY % variables-mod SYSTEM "../generated/variables.mod">
%variables-mod;
]>
<appendix id="app-python"
xmlns="http://www.scons.org/dbxsd/v1.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.scons.org/dbxsd/v1.0 http://www.scons.org/dbxsd/v1.0/scons.xsd">
<title>Python overview</title>
<!--
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without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-->
<para>
This section will provide a brief overview of
the Python programming language.
Skip this section if you are already familiar with Python
(or you're really intent on diving into &SCons;
and just picking up things as you go).
</para>
<para>
Python has a lot of good
documentation freely available on-line
to help you get started.
The standard tutorial is available at XXX.
</para>
<para>
Python is very easy to pick up.
</para>
<para>
Python variables must be assigned to before they can be referenced.
</para>
<para>
Assignment is like most programming languages:
x = 1 + 2
z = 3 * x
</para>
<para>
Function calls look like most language function calls:
a = f(g)
</para>
<para>
Define functions like so:
def func(arg1, arg2):
return arg1 * arg 2
The number of parameters
</para>
<para>
Strings can be enclosed in single quotes or double quotes,
backslashes are used to escape characters,
triple-quote syntax lets you include quotes and newlines,
raw strings begin with 'r'.
</para>
<para>
Lists are enclosed in square brackets,
list items are separated by commas.
List references use square brackets and integer index values,
slice notation lets you select, delete or replace a range.
</para>
<para>
Dictionaries (hashes) are enclosed in curly brackets,
: separates keys from values,
, separates items.
Dictionary values are referenced using square brackets.
</para>
<para>
Access class attributes (including methods) using a '.'.
</para>
<para>
if: statements look like
elif: statements look like
else: statements look like
</para>
<para>
for: statements look like
while: statements look like
break statements look like
continue statements look like
</para>
<para>
pass
</para>
</appendix>
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