pythondjango数据库

❶ python库Django，Flask各有什么用途

Flask适合做app后台或基于json通信的ajax应用，是轻量级框架，我用到的一个技术方案是pypy+ Flask +peewee + uWSGI + nginx + ubuntu server，速度快，开发效率高，主要是通过服务器返回json数据（json可以用压缩方式）走http和各个app交互，你也可以用Flask+WebSocket实现类似在线游戏的长连接，数据格式建议用json，如果有性能要求可以用Protocol Buffers协议。这样基于json api（RESTful太底层了，一般用json文本就可以了）的开发方式，一套后台程序，可以用于ajax网页，android,ios,pc,tv等多套app,最大程度满足了软件复用思想，否则一个app开发一个后台或变种后台，代价非常高，也不利于安全和性能。微服务就是这种思想扩展，但主要是针对企业应用，web2.0发展以来，一般应用用http api生成json数据交互就好，mvc模式不适合在http api上用，mvc模式是web1.0时代没有ajax，json无法分离html的妥协解决方案。http调用类似函数一样，有入口参数，返回json给调用者，当然可以在返回时加密、压缩,从而实现低耦合高内聚。另外对于http api需要防止注入攻击，加强权限控制，限制调用次数。
Django属于重量级的，很多东西是现存的，只要熟悉就可以用，但缺点是不如Flask定制灵活，适合用于普通的web应用。

❷ python3.6下如何用Django1.9创建数据库报错

错误描述
python==3.5
django==1.7
django创建项目时报错如下：
Traceback (most recent call last):
File "/root/envs/django-test/bin/django-admin", line 11, in <mole>
sys.exit(execute_from_command_line())
File "/root/envs/django-test/lib/python3.5/site-packages/django/core/management/__init__.py", line 385, in execute_from_command_line
utility.execute()
File "/root/envs/django-test/lib/python3.5/site-packages/django/core/management/__init__.py", line 354, in execute
django.setup()
File "/root/envs/django-test/lib/python3.5/site-packages/django/__init__.py", line 18, in setup
from django.utils.log import configure_logging
File "/root/envs/django-test/lib/python3.5/site-packages/django/utils/log.py", line 10, in <mole>
from django.views.debug import ExceptionReporter, get_exception_reporter_filter
File "/root/envs/django-test/lib/python3.5/site-packages/django/views/debug.py", line 10, in <mole>
from django.http import (HttpResponse, HttpResponseServerError,
File "/root/envs/django-test/lib/python3.5/site-packages/django/http/__init__.py", line 4, in <mole>
from django.http.response import (HttpResponse, StreamingHttpResponse,
File "/root/envs/django-test/lib/python3.5/site-packages/django/http/response.py", line 13, in <mole>
from django.core.serializers.json import DjangoJSONEncoder
File "/root/envs/django-test/lib/python3.5/site-packages/django/core/serializers/__init__.py", line 23, in <mole>
from django.core.serializers.base import SerializerDoesNotExist
File "/root/envs/django-test/lib/python3.5/site-packages/django/core/serializers/base.py", line 6, in <mole>
from django.db import models
File "/root/envs/django-test/lib/python3.5/site-packages/django/db/models/__init__.py", line 6, in <mole>
from django.db.models.query import Q, QuerySet, Prefetch # NOQA
File "/root/envs/django-test/lib/python3.5/site-packages/django/db/models/query.py", line 13, in <mole>
from django.db.models.fields import AutoField, Empty
File "/root/envs/django-test/lib/python3.5/site-packages/django/db/models/fields/__init__.py", line 18, in <mole>
from django import forms
File "/root/envs/django-test/lib/python3.5/site-packages/django/forms/__init__.py", line 6, in <mole>
from django.forms.fields import * # NOQA
File "/root/envs/django-test/lib/python3.5/site-packages/django/forms/fields.py", line 18, in <mole>
from django.forms.utils import from_current_timezone, to_current_timezone
File "/root/envs/django-test/lib/python3.5/site-packages/django/forms/utils.py", line 15, in <mole>
from django.utils.html import format_html, format_html_join, escape
File "/root/envs/django-test/lib/python3.5/site-packages/django/utils/html.py", line 16, in <mole>
from .html_parser import HTMLParser, HTMLParseError
File "/root/envs/django-test/lib/python3.5/site-packages/django/utils/html_parser.py", line 12, in <mole>
HTMLParseError = _html_parser.HTMLParseError
AttributeError: mole 'html.parser' has no attribute 'HTMLParseError'
(django-test) root@localhost:~/source/djangotest# django-admin startproject superlists
Traceback (most recent call last):
File "/root/envs/django-test/bin/django-admin", line 11, in <mole>
sys.exit(execute_from_command_line())
File "/root/envs/django-test/lib/python3.5/site-packages/django/core/management/__init__.py", line 385, in execute_from_command_line
utility.execute()
File "/root/envs/django-test/lib/python3.5/site-packages/django/core/management/__init__.py", line 354, in execute
django.setup()
File "/root/envs/django-test/lib/python3.5/site-packages/django/__init__.py", line 18, in setup
from django.utils.log import configure_logging
File "/root/envs/django-test/lib/python3.5/site-packages/django/utils/log.py", line 10, in <mole>
from django.views.debug import ExceptionReporter, get_exception_reporter_filter
File "/root/envs/django-test/lib/python3.5/site-packages/django/views/debug.py", line 10, in <mole>
from django.http import (HttpResponse, HttpResponseServerError,
File "/root/envs/django-test/lib/python3.5/site-packages/django/http/__init__.py", line 4, in <mole>
from django.http.response import (HttpResponse, StreamingHttpResponse,
File "/root/envs/django-test/lib/python3.5/site-packages/django/http/response.py", line 13, in <mole>
from django.core.serializers.json import DjangoJSONEncoder
File "/root/envs/django-test/lib/python3.5/site-packages/django/core/serializers/__init__.py", line 23, in <mole>
from django.core.serializers.base import SerializerDoesNotExist
File "/root/envs/django-test/lib/python3.5/site-packages/django/core/serializers/base.py", line 6, in <mole>
from django.db import models
File "/root/envs/django-test/lib/python3.5/site-packages/django/db/models/__init__.py", line 6, in <mole>
from django.db.models.query import Q, QuerySet, Prefetch # NOQA
File "/root/envs/django-test/lib/python3.5/site-packages/django/db/models/query.py", line 13, in <mole>
from django.db.models.fields import AutoField, Empty
File "/root/envs/django-test/lib/python3.5/site-packages/django/db/models/fields/__init__.py", line 18, in <mole>
from django import forms
File "/root/envs/django-test/lib/python3.5/site-packages/django/forms/__init__.py", line 6, in <mole>
from django.forms.fields import * # NOQA
File "/root/envs/django-test/lib/python3.5/site-packages/django/forms/fields.py", line 18, in <mole>
from django.forms.utils import from_current_timezone, to_current_timezone
File "/root/envs/django-test/lib/python3.5/site-packages/django/forms/utils.py", line 15, in <mole>
from django.utils.html import format_html, format_html_join, escape
File "/root/envs/django-test/lib/python3.5/site-packages/django/utils/html.py", line 16, in <mole>
from .html_parser import HTMLParser, HTMLParseError
File "/root/envs/django-test/lib/python3.5/site-packages/django/utils/html_parser.py", line 12, in <mole>
HTMLParseError = _html_parser.HTMLParseError
AttributeError: mole 'html.parser' has no attribute 'HTMLParseError'5767757677

原因
HTMLParseError在pythons3.5已经没有了
解决方法
将python版本回退到3.3或3.4
升级django版本

❸ pycharm下的django怎么连接mysql数据库啊

方法/步骤

修改setting.py里面的DATABASES元组为
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
'NAME': 'books', #你的数据库名称
'USER': 'root', #你的数据库用户名
'PASSWORD': '', #你的数据库密码
'HOST': '', #你的数据库主机，留空默认为localhost
'PORT': '3306', #你的数据库端口
}
}

INSTALLED_APPS = (
'books',#你的数据库名称
)

在mysql里面创建books数据库

检查配置是否有语法错误

使用python manage.py sqlall books 显示mysql语法

使用python manage.py syncdb同步模型中的数据库

创建成功！

❹ python库Django，Flask各有什么用途

Django和flask都是python用来开发web的框架.
Django:简便、快速的开发数据库驱动的网站。它强调代码复用,多个组件可以很方便的以“插件”形式服务于整个框架，Django有许多功能强大的第三方插件，你甚至可以很方便的开发出自己的工具包。
Flask:一个Python Web框架，整个框架只有一个文件，几十K，却自带了路径映射、模
板、简单的数据库访问等web框架组件，确实是个可用的框架。初学web开发可
以拿来玩玩，其语法简单，部署也很方便。

❺ 【Python基础】django默认数据库是什么

没有配置的话默认数据库是sqlite，可以在setting里的DATABASES进行数据库配置