1. pyrange

   just support download by range now.

   ---

   example

   ​ 1）common download.

   import pyrange

   task = pyrange.Download("https://www.python.org/ftp/python/2.7.13/python-2.7.13-macosx10.6.pkg")

   task.start()

   ​ 2）download in block mode.

   import pyrange

   task = pyrange.Download("https://www.python.org/ftp/python/2.7.13/python-2.7.13-macosx10.6.pkg", thread_num=5, path="./python-2.7.13-macosx.pkg")

   task.start()

   ​ 3) download in unblock mode, also support callback.

   import pyrange

   def func(url, filepath):

   ​ print "finished"

   task = pyrange.Download("https://www.python.org/ftp/python/2.7.13/python-2.7.13-macosx10.6.pkg", thread_num=5, path="./python-2.7.13-macosx.pkg", block=False, callback=func)

   task.start()

   task.wait()