TypeError: 'module' object is not callable 原因分析

# encoding:GBK
from xml.dom.minidom import Document
# from xml.etree.ElementTree import ElementTree
import time
class XmlBuild:
    def __init__(self, action_id, operation):
        self.action_id = action_id
        self.operation = operation
        self.parameter = None
        self.commandname = None
        self.doc = Document()

        

调用

'''
Created on 2013-2-19


@author: lvxinzhi
'''
import XmlBuild
import Send


if __name__ == '__main__':
    xml = XmlBuild.XmlBuild('ClientFileManagerCommand', 'downloadfile')
    xml.addParameter('filename', 'update_tmp.ini')
    xml.commandname = 'ClientFileManagerCommand.downloadfile'
    print xml.getXml().toxml()
    #xml.saveas('c:\\client.ClientFileManagerCommand.downloadfile.xml')
    

Traceback (most recent call last):
  File "D:\workSpace\python\Client\src\Main.py", line 10, in
    xml = XmlBuild('ClientFileManagerCommand', 'downloadfile')
TypeError: 'module' object is not callable

原因分析：
Python导入模块的方法有两种：import module 和 from module import，区别是前者所有导入的东西使用时需加上模块名的限定，而后者不要。
正确的代码：
import XmlBuild
import Send
if __name__ == '__main__':
    xml = XmlBuild.XmlBuild('ClientFileManagerCommand', 'downloadfile')
或
from XmlBuild import *
import Send
if __name__ == '__main__':
    xml = XmlBuild('ClientFileManagerCommand', 'downloadfile')