问Shopify python api间歇性连接错误

EN

Traceback (most recent call last):
  File "/home/will/workspace/modernprints-django/shop/export.py", line 226, in <module>
    prints()
  File "/home/will/workspace/modernprints-django/shop/export.py", line 122, in prints
    copy_metafields(fields, old_print, new_print)
  File "/home/will/workspace/modernprints-django/shop/export.py", line 35, in copy_metafields
    'value_type': 'string',
  File "/home/will/virtualenv/modernprints-django/local/lib/python2.7/site-packages/shopify/mixins.py", line 22, in add_metafield
    metafield.save()
  File "/home/will/virtualenv/modernprints-django/local/lib/python2.7/site-packages/pyactiveresource/activeresource.py", line 824, in save
    data=self.encode())
  File "/home/will/virtualenv/modernprints-django/local/lib/python2.7/site-packages/pyactiveresource/connection.py", line 364, in post
    return self._open('POST', path, headers=headers, data=data)
  File "/home/will/virtualenv/modernprints-django/local/lib/python2.7/site-packages/shopify/base.py", line 23, in _open
    self.response = super(ShopifyConnection, self)._open(*args, **kwargs)
  File "/home/will/virtualenv/modernprints-django/local/lib/python2.7/site-packages/pyactiveresource/connection.py", line 290, in _open
    raise Error(err, url)
pyactiveresource.connection.Error: <urlopen error [Errno -2] Name or service not known>