example.xml

<tool id="example.py" name="example.py" version="2.0">
  <description>Process some integers.</description>
  <stdio>
    <exit_code level="fatal" range="1:"/>
  </stdio>
  <version_command><![CDATA[python example.py --version]]></version_command>
  <command><![CDATA[python example.py $keyword

#set repeat_var_2 = '" "'.join([ str($var.integers) for $var in $repeat_2 ])
"$repeat_var_2"

$sum

#if $foo and $foo is not None:
--foo $foo
#end if

#set repeat_var_4 = '" "'.join([ str($var.bar) for $var in $repeat_4 ])
--bar "$repeat_var_4"

$true
$false
#for $i in $repeat_5:
--append $i.append
#end for
#for $i in $repeat_6:
--nargs2 "$repeat_var_6"
#end for

#if $mode and $mode is not None:
--mode $mode
#end if
> $default]]></command>
  <inputs>
    <param label="action keyword" name="keyword" type="text"/>
    <repeat min="1" name="repeat_2" title="repeat_title">
      <param label="an integer for the accumulator" name="integers" type="integer" value="0"/>
    </repeat>
    <param argument="--sum" checked="false" label="sum the integers (default: find the max)" name="sum" type="boolean" truevalue="--sum" falsevalue=""/>
    <param argument="--foo" label="foo help" name="foo" optional="true" type="text"/>
    <repeat name="repeat_4" title="repeat_title">
      <param argument="--bar" label="BAR!" name="bar" optional="true" type="text" value="1"/>
    </repeat>
    <param argument="--true" checked="false" label="Store a true" name="true" type="boolean" truevalue="--true" falsevalue=""/>
    <param argument="--false" checked="false" label="Store a false" name="false" type="boolean" truevalue="--false" falsevalue=""/>
    <repeat name="repeat_5" title="Repeated Variable">
      <param argument="--append" label="Append a value" name="append" type="text"/>
    </repeat>
    <repeat max="2" min="2" name="repeat_6" title="repeat_title">
      <param argument="--nargs2" label="nargs2" name="nargs2" optional="true" type="text"/>
    </repeat>
    <param argument="--mode" label="Author did not provide help for this parameter... " name="mode" optional="true" type="select">
      <option value="paper">paper</option>
      <option value="rock">rock</option>
      <option selected="true" value="scissors">scissors</option>
    </param>
  </inputs>
  <outputs>
    <data format="txt" hidden="false" name="default"/>
  </outputs>
  <help><![CDATA[here's some epilog text]]></help>
</tool>