pythondjango資料庫

❶ python庫Django，Flask各有什麼用途

Flask適合做app後台或基於json通信的ajax應用，是輕量級框架，我用到的一個技術方案是pypy+ Flask +peewee + uWSGI + nginx + ubuntu server，速度快，開發效率高，主要是通過伺服器返回json數據（json可以用壓縮方式）走http和各個app交互，你也可以用Flask+WebSocket實現類似在線游戲的長連接，數據格式建議用json，如果有性能要求可以用Protocol Buffers協議。這樣基於json api（RESTful太底層了，一般用json文本就可以了）的開發方式，一套後台程序，可以用於ajax網頁，android,ios,pc,tv等多套app,最大程度滿足了軟體復用思想，否則一個app開發一個後台或變種後台，代價非常高，也不利於安全和性能。微服務就是這種思想擴展，但主要是針對企業應用，web2.0發展以來，一般應用用http api生成json數據交互就好，mvc模式不適合在http api上用，mvc模式是web1.0時代沒有ajax，json無法分離html的妥協解決方案。http調用類似函數一樣，有入口參數，返回json給調用者，當然可以在返回時加密、壓縮,從而實現低耦合高內聚。另外對於http api需要防止注入攻擊，加強許可權控制，限制調用次數。
Django屬於重量級的，很多東西是現存的，只要熟悉就可以用，但缺點是不如Flask定製靈活，適合用於普通的web應用。

❷ python3.6下如何用Django1.9創建資料庫報錯

錯誤描述
python==3.5
django==1.7
django創建項目時報錯如下：
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已經沒有了
解決方法
將python版本回退到3.3或3.4
升級django版本

❸ pycharm下的django怎麼連接mysql資料庫啊

方法/步驟

修改setting.py裡面的DATABASES元組為
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
'NAME': 'books', #你的資料庫名稱
'USER': 'root', #你的資料庫用戶名
'PASSWORD': '', #你的資料庫密碼
'HOST': '', #你的資料庫主機，留空默認為localhost
'PORT': '3306', #你的資料庫埠
}
}

INSTALLED_APPS = (
'books',#你的資料庫名稱
)

在mysql裡面創建books資料庫

檢查配置是否有語法錯誤

使用python manage.py sqlall books 顯示mysql語法

使用python manage.py syncdb同步模型中的資料庫

創建成功！

❹ python庫Django，Flask各有什麼用途

Django和flask都是python用來開發web的框架.
Django:簡便、快速的開發資料庫驅動的網站。它強調代碼復用,多個組件可以很方便的以「插件」形式服務於整個框架，Django有許多功能強大的第三方插件，你甚至可以很方便的開發出自己的工具包。
Flask:一個Python Web框架，整個框架只有一個文件，幾十K，卻自帶了路徑映射、模
板、簡單的資料庫訪問等web框架組件，確實是個可用的框架。初學web開發可
以拿來玩玩，其語法簡單，部署也很方便。

❺ 【Python基礎】django默認資料庫是什麼

沒有配置的話默認資料庫是sqlite，可以在setting里的DATABASES進行資料庫配置