ImportError: cannot import name 'HTMLCalendar'

[henan01]

[root@test zinnia]# python managers.py migrate
Traceback (most recent call last):
File "managers.py", line 2, in
from django.contrib.sites.models import Site
File "/usr/local/python36/lib/python3.6/site-packages/Django-2.0.1-py3.6.egg/django/contrib/sites/models.py", line 4, in
from django.db import models
File "/usr/local/python36/lib/python3.6/site-packages/Django-2.0.1-py3.6.egg/django/db/models/init.py", line 3, in
from django.db.models.aggregates import * # NOQA
File "/usr/local/python36/lib/python3.6/site-packages/Django-2.0.1-py3.6.egg/django/db/models/aggregates.py", line 5, in
from django.db.models.expressions import Case, Func, Star, When
File "/usr/local/python36/lib/python3.6/site-packages/Django-2.0.1-py3.6.egg/django/db/models/expressions.py", line 7, in
from django.db.models import fields
File "/usr/local/python36/lib/python3.6/site-packages/Django-2.0.1-py3.6.egg/django/db/models/fields/init.py", line 11, in
from django import forms
File "/usr/local/python36/lib/python3.6/site-packages/Django-2.0.1-py3.6.egg/django/forms/init.py", line 6, in
from django.forms.boundfield import * # NOQA
File "/usr/local/python36/lib/python3.6/site-packages/Django-2.0.1-py3.6.egg/django/forms/boundfield.py", line 4, in
from django.forms.utils import flatatt, pretty_name
File "/usr/local/python36/lib/python3.6/site-packages/Django-2.0.1-py3.6.egg/django/forms/utils.py", line 7, in
from django.utils.html import escape, format_html, format_html_join, html_safe
File "/usr/local/python36/lib/python3.6/site-packages/Django-2.0.1-py3.6.egg/django/utils/html.py", line 10, in
from django.utils.http import RFC3986_GENDELIMS, RFC3986_SUBDELIMS
File "/usr/local/python36/lib/python3.6/site-packages/Django-2.0.1-py3.6.egg/django/utils/http.py", line 2, in
import calendar
File "/root/zhangpanfeng/django-blog-zinnia/zinnia/calendar.py", line 4, in
from zinnia.calendar import HTMLCalendar
File "/usr/local/python36/lib/python3.6/site-packages/django_blog_zinnia-0.19.1.dev0-py3.6.egg/zinnia/calendar.py", line 4, in
from calendar import HTMLCalendar
ImportError: cannot import name 'HTMLCalendar'

[Fantomas42]

Irreproductible, does not follow guidelines. Close issue.