这里主要是给出界面，让用户可以选择保存的路径，还有网络地址可选，使用wxPython库编写

#encoding:UTF-8
import wx
import os
import crawlFirst

class SelectPath(wx.Frame):
    def __init__(self,parent,id):
        wx.Frame.__init__(self,None,-1,u"选择保存路径(作者:董继超 版权所有)",size=(500,300),style=wx.SYSTEM_MENU | wx.CAPTION | wx.CLOSE_BOX | wx.CLIP_CHILDREN)
        panel=wx.Panel(self,-1)
        button1=wx.Button(panel,label=u"开始",pos=(20,220),size=(60,30))
        button2=wx.Button(panel,label=u"关闭",pos=(100,220),size=(60,30))
        button3=wx.Button(panel,label=u"选择文件夹",pos=(380,77),size=(100,30))

        sList=["http://www.2cto.com/meinv/rhmeinv/","http://www.2cto.com/meinv/sexmv"]
        wx.StaticText(panel,-1,u"选择一个网址",(20,25))
        self.combo= wx.ComboBox(panel,-1,"http://www.2cto.com/meinv/rhmeinv/",(100,22),choices=sList,style=0)

        self.input_text = wx.TextCtrl(panel, -1, u"",pos=(20,80), size=(350, 25))
        self.Bind(wx.EVT_BUTTON,self.OnStart,button1)
        self.Bind(wx.EVT_BUTTON,self.OnCloseMe,button2)
        self.Bind(wx.EVT_BUTTON,self.OnSelPath,button3)
        self.Bind(wx.EVT_CLOSE,self.OnCloseWindow)

    def OnSelPath(self,event):
        dialog=wx.DirDialog(None,u"选择图片保存的目录",style=wx.DD_DEFAULT_STYLE | wx.DD_NEW_DIR_BUTTON)
        if dialog.ShowModal()==wx.ID_OK:
            self.input_text.SetValue(dialog.GetPath())

    def OnStart(self,event):
        sPath=self.input_text.Value.strip(" ")
        if sPath =="":
            wx.MessageBox(u'请选择保存路径',u'提示',wx.OK|wx.ICON_INFORMATION)
            return
        elif not os.path.exists(sPath):
            wx.MessageBox(u'所选路径不存在',u'提示',wx.OK|wx.ICON_INFORMATION)
            return
        else:
            print self.combo.Value
            crawlFirst.GetUrlContent(self.combo.Value,sPath)

    def OnCloseMe(self,event):
        self.Close(True)

    def OnCloseWindow(self,event):
        self.Destroy()

if __name__=='__main__':
    app=wx.PySimpleApp()
    frame=SelectPath(parent=None,id=-1)
    frame.Show()
    app.MainLoop()