compatible python2

subcmds/gitee_pr.py

@@ -13,6 +13,8 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+from __future__ import print_function
+
 import sys
 import requests
 import json

subcmds/push.py

@@ -13,11 +13,10 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
+from __future__ import print_function
 import copy
 import re
 import sys
-
 from command import InteractiveCommand
 from editor import Editor
 from error import UploadError, GitError, PullRequestError