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A Django hello world example

Python 100.00%

python python3 django hello-world helloworld-programs example

django-helloworld's Introduction

django-helloworld

A Django 'Hello World' program example.

Installation

You need install the pre-requirements for run this Hello World example.

Update repositories of available packages to install, with the following command:

$ sudo apt update

Install necessary minimum dependencies, with the following command:

$ sudo apt install python3-dev python3-pip python3-virtualenv sqlitebrowser

For run this example need to install Django framework execute the follow command:

$ sudo pip install -r requirements.txt

And later followed by:

$ python3 manage.py migrate

At which point you should see:

Operations to perform:
  Apply all migrations: admin, auth, contenttypes, sessions, sites
Running migrations:

  Applying contenttypes.0001_initial... OK
  Applying auth.0001_initial... OK
  Applying admin.0001_initial... OK
  Applying admin.0002_logentry_remove_auto_add... OK
  Applying admin.0003_logentry_add_action_flag_choices... OK
  Applying contenttypes.0002_remove_content_type_name... OK
  Applying auth.0002_alter_permission_name_max_length... OK
  Applying auth.0003_alter_user_email_max_length... OK
  Applying auth.0004_alter_user_username_opts... OK
  Applying auth.0005_alter_user_last_login_null... OK
  Applying auth.0006_require_contenttypes_0002... OK
  Applying auth.0007_alter_validators_add_error_messages... OK
  Applying auth.0008_alter_user_username_max_length... OK
  Applying auth.0009_alter_user_last_name_max_length... OK
  Applying sessions.0001_initial... OK
  Applying sites.0001_initial... OK
  Applying sites.0002_alter_domain_unique... OK

For use the Django Admin Interface, it's needed to create a superuser for management, with the following command:

$ python3 manage.py createsuperuser --username admin --email [email protected]

At which point you should see:

Password:
Password (again):

Superuser created successfully.

Run application

After which you can run:

$ python3 manage.py runserver

Then, you can open the URL http://127.0.0.1:8000/ in your web browser and you can see the hello world example like this:

A Django 'Hello World' program example

Also you can open in your web browser the URL http://127.0.0.1:8000/admin for access to the Django Admin Interface like this:

Django Admin Interface running

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django-helloworld's Issues

question about python3-virtualenv

Hi, I'm using your django hello-world app to experiment creating django apps in kubernetes. I am copying your steps into a Dockerfile and building it.

FROM debian

ENV DEBIAN_FRONTEND=noninteractive
RUN apt update && apt install -y python3-dev python3-pip python3-virtualenv sqlitebrowser && rm -rf /var/lib/apt/lists/*

COPY requirements.txt /

RUN pip install -r requirements.txt
...

and I get an error when it's installing the requirements

...
 => ERROR [ 4/11] RUN pip install -r requirements.txt                                                                                                                                                              0.6s
------                                                                                                                                                                                                                  
 > [ 4/11] RUN pip install -r requirements.txt:                                                                                                                                                                         
#0 0.520 error: externally-managed-environment                                                                                                                                                                          
#0 0.520                                                                                                                                                                                                                
#0 0.520 × This environment is externally managed                                                                                                                                                                       
#0 0.520 ╰─> To install Python packages system-wide, try apt install
#0 0.520     python3-xyz, where xyz is the package you are trying to
#0 0.520     install.
#0 0.520     
#0 0.520     If you wish to install a non-Debian-packaged Python package,
#0 0.520     create a virtual environment using python3 -m venv path/to/venv.
#0 0.520     Then use path/to/venv/bin/python and path/to/venv/bin/pip. Make
#0 0.520     sure you have python3-full installed.
#0 0.520     
#0 0.520     If you wish to install a non-Debian packaged Python application,
#0 0.520     it may be easiest to use pipx install xyz, which will manage a
#0 0.520     virtual environment for you. Make sure you have pipx installed.
#0 0.520     
#0 0.520     See /usr/share/doc/python3.11/README.venv for more information.
#0 0.520 
#0 0.520 note: If you believe this is a mistake, please contact your Python installation or OS distribution provider. You can override this, at the risk of breaking your Python installation or OS, by passing --break-system-packages.
#0 0.520 hint: See PEP 668 for the detailed specification.
------
Dockerfile:8
--------------------
   6 |     COPY requirements.txt /
   7 |     
   8 | >>> RUN pip install -r requirements.txt
   9 |     
  10 |     RUN mkdir -p /docs
--------------------
ERROR: failed to solve: process "/bin/sh -c pip install -r requirements.txt" did not complete successfully: exit code: 1

So I am thinking it's an error relating to the venv. My question is where is the python3-virtualenv getting used? Should I create a venv to the container before pip install?

No worries if you don't have time. I'll keep investigating and will post a reply if I find an answer.

Error : cannot import name 'patterns' ; How to solve it ?

Traceback (most recent call last): File "manage.py", line 22, in <module> execute_from_command_line(sys.argv) File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/core/management/__init__.py", line 367, in execute_from_command_line utility.execute() File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/core/management/__init__.py", line 359, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/core/management/base.py", line 294, in run_from_argv self.execute(*args, **cmd_options) File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/core/management/base.py", line 342, in execute self.check() File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/core/management/base.py", line 374, in check include_deployment_checks=include_deployment_checks, File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/core/management/commands/migrate.py", line 62, in _run_checks issues.extend(super(Command, self)._run_checks(**kwargs)) File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/core/management/base.py", line 361, in _run_checks return checks.run_checks(**kwargs) File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/core/checks/registry.py", line 81, in run_checks new_errors = check(app_configs=app_configs) File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/core/checks/urls.py", line 14, in check_url_config return check_resolver(resolver) File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/core/checks/urls.py", line 24, in check_resolver for pattern in resolver.url_patterns: File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/utils/functional.py", line 35, in __get__ res = instance.__dict__[self.name] = self.func(instance) File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/urls/resolvers.py", line 313, in url_patterns patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module) File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/utils/functional.py", line 35, in __get__ res = instance.__dict__[self.name] = self.func(instance) File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/urls/resolvers.py", line 306, in urlconf_module return import_module(self.urlconf_name) File "/Users/robiulislam/anaconda/lib/python3.6/importlib/__init__.py", line 126, in import_module return _bootstrap._gcd_import(name[level:], package, level) File "<frozen importlib._bootstrap>", line 978, in _gcd_import File "<frozen importlib._bootstrap>", line 961, in _find_and_load File "<frozen importlib._bootstrap>", line 950, in _find_and_load_unlocked File "<frozen importlib._bootstrap>", line 655, in _load_unlocked File "<frozen importlib._bootstrap_external>", line 678, in exec_module File "<frozen importlib._bootstrap>", line 205, in _call_with_frames_removed File "/Users/robiulislam/personal/personal/urls.py", line 15, in <module> url(r'^polls/$', 'personal.views.polls'), File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/conf/urls/__init__.py", line 85, in url raise TypeError('view must be a callable or a list/tuple in the case of include().') TypeError: view must be a callable or a list/tuple in the case of include(). ROBIULs-MacBook-Pro:personal robiulislam$ cd ./hone -bash: cd: ./hone: No such file or directory ROBIULs-MacBook-Pro:personal robiulislam$ cd /home ROBIULs-MacBook-Pro:home robiulislam$ cd helloworld-master -bash: cd: helloworld-master: No such file or directory ROBIULs-MacBook-Pro:home robiulislam$ ls ROBIULs-MacBook-Pro:home robiulislam$ cd /Users/robiulislam/helloworld-master ROBIULs-MacBook-Pro:helloworld-master robiulislam$ python manage.py migrate \Traceback (most recent call last): File "manage.py", line 10, in <module> execute_from_command_line(sys.argv) File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/core/management/__init__.py", line 367, in execute_from_command_line utility.execute() File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/core/management/__init__.py", line 359, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/core/management/base.py", line 294, in run_from_argv self.execute(*args, **cmd_options) File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/core/management/base.py", line 342, in execute self.check() File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/core/management/base.py", line 374, in check include_deployment_checks=include_deployment_checks, File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/core/management/commands/migrate.py", line 62, in _run_checks issues.extend(super(Command, self)._run_checks(**kwargs)) File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/core/management/base.py", line 361, in _run_checks return checks.run_checks(**kwargs) File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/core/checks/registry.py", line 81, in run_checks new_errors = check(app_configs=app_configs) File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/core/checks/urls.py", line 14, in check_url_config return check_resolver(resolver) File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/core/checks/urls.py", line 24, in check_resolver for pattern in resolver.url_patterns: File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/utils/functional.py", line 35, in __get__ res = instance.__dict__[self.name] = self.func(instance) File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/urls/resolvers.py", line 313, in url_patterns patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module) File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/utils/functional.py", line 35, in __get__ res = instance.__dict__[self.name] = self.func(instance) File "/Users/robiulislam/anaconda/lib/python3.6/site-packages/django/urls/resolvers.py", line 306, in urlconf_module return import_module(self.urlconf_name) File "/Users/robiulislam/anaconda/lib/python3.6/importlib/__init__.py", line 126, in import_module return _bootstrap._gcd_import(name[level:], package, level) File "<frozen importlib._bootstrap>", line 978, in _gcd_import File "<frozen importlib._bootstrap>", line 961, in _find_and_load File "<frozen importlib._bootstrap>", line 950, in _find_and_load_unlocked File "<frozen importlib._bootstrap>", line 655, in _load_unlocked File "<frozen importlib._bootstrap_external>", line 678, in exec_module File "<frozen importlib._bootstrap>", line 205, in _call_with_frames_removed File "/Users/robiulislam/helloworld-master/helloworld/urls.py", line 3, in <module> from django.conf.urls import patterns, include ImportError: cannot import name 'patterns'

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