求救python解析问题！

本人是初学者，现在配置python web环境，按照网上的教程配置好了，解析测试文件helloword文件的时候。出现下面的问题：
MOD_PYTHON ERROR

ProcessId:      1564
Interpreter:    'localhost'

ServerName:     'localhost'
DocumentRoot:   'C:/apache/htdocs'

URI:            '/testpython/testMyFirstPage.py'
Location:       None
Directory:      'C:/apache/htdocs/testpython/'
Filename:       'C:\\apache\\htdocs\\testpython\\testMyFirstPage.py'
PathInfo:       ''

Phase:          'PythonHandler'
Handler:        'mod_python.publisher'

Traceback (most recent call last):

  File "C:\Python25\Lib\site-packages\mod_python\importer.py", line 1537, in HandlerDispatch
    default=default_handler, arg=req, silent=hlist.silent)

  File "C:\Python25\Lib\site-packages\mod_python\importer.py", line 1229, in _process_target
    result = _execute_target(config, req, object, arg)

  File "C:\Python25\Lib\site-packages\mod_python\importer.py", line 1128, in _execute_target
    result = object(arg)

  File "C:\Python25\Lib\site-packages\mod_python\publisher.py", line 204, in handler
    module = page_cache[req]

  File "C:\Python25\Lib\site-packages\mod_python\importer.py", line 1059, in __getitem__
    return import_module(req.filename)

  File "C:\Python25\Lib\site-packages\mod_python\importer.py", line 296, in import_module
    log, import_path)

  File "C:\Python25\Lib\site-packages\mod_python\importer.py", line 680, in import_module
    execfile(file, module.__dict__)

  File "C:\apache\htdocs\testpython\testMyFirstPage.py", line 3

    req.write("Hello World!")

      ^

IndentationError: expected an indented block


MODULE CACHE DETAILS

Accessed:       Wed Dec 12 11:52:47 2007
Generation:     0

_mp_1d847083d49b9d0fb4d8c5d3c3f03566 {
  FileName:     'C:\\apache\\htdocs\\testpython\\testMyFirstPage.py'
  Instance:     1 [IMPORT]
  Generation:   0 [ERROR]
  Modified:     Tue Dec 11 16:56:48 2007
}

这是在cmd下的输出也是如下的错误：
IndentationError: expected an indented block

请问大家怎么解决？谢谢

怎么没有人回答啊？

检查缩进

字面意思就是缩进不对头。检查下

测试文件编辑成下面的样子就行了：
from mod_python import apache

def handler(req):
    req.write("Hello World!")
    return apache.OK

文本缩进要求比较严的!