### PyAPNs2 Development Setup

Source: https://github.com/pr0ger/pyapns2/blob/master/README.md

Details the steps required to set up the PyAPNs2 project for development, including cloning the repository, creating a virtual environment, and installing development dependencies with test support.

```shell
# Clone the source code.
git clone https://github.com/Pr0Ger/PyAPNs2.git
cd PyAPNs2
# Create a virtualenv and install dependencies.
virtualenv venv
. venv/bin/activate
pip install -e .[tests]
```

--------------------------------

### PyAPNs2 Installation

Source: https://github.com/pr0ger/pyapns2/blob/master/README.md

Provides the command to install the PyAPNs2 library using pip. This is the standard method for adding the library to a Python project.

```shell
pip install apns2
```

--------------------------------

### Running PyAPNs2 Tests

Source: https://github.com/pr0ger/pyapns2/blob/master/README.md

Explains how to execute the test suite for PyAPNs2 using the pytest framework. This is crucial for verifying the library's functionality and ensuring code quality.

```shell
pytest
```

--------------------------------

### Linting PyAPNs2 Code

Source: https://github.com/pr0ger/pyapns2/blob/master/README.md

Shows how to run the linter (pylint) on the PyAPNs2 codebase to check for code style and potential errors. This helps maintain code quality and consistency.

```shell
pip install pylint
pylint --reports=n apns2 test
```

--------------------------------

### Running PyAPNs2 Tests with Tox

Source: https://github.com/pr0ger/pyapns2/blob/master/README.md

Demonstrates how to use tox to run PyAPNs2 tests across multiple Python versions. This ensures compatibility and proper functioning in different Python environments.

```shell
pyenv install 3.5.6; pyenv install 3.6.7; pyenv install 3.7.1; pyenv install 3.8.0
pyenv local 3.8.0 3.7.1 3.6.7 3.5.6
pip install tox
tox
```

--------------------------------

### Token-Based Authentication for APNs

Source: https://github.com/pr0ger/pyapns2/blob/master/README.md

Illustrates how to use token-based authentication with APNs, which is the recommended method. This involves providing authentication key details such as the key path, key ID, and team ID to the APNs client.

```python
from apns2.client import APNsClient
from apns2.payload import Payload
from apns2.credentials import TokenCredentials
import collections

token_hex = 'b5bb9d8014a0f9b1d61e21e796d78dccdf1352f23cd32812f4850b87'
payload = Payload(alert="Hello World!", sound="default", badge=1)
topic = 'com.example.App'

auth_key_path = 'path/to/auth_key'
auth_key_id = 'app_auth_key_id'
team_id = 'app_team_id'
token_credentials = TokenCredentials(auth_key_path=auth_key_path, auth_key_id=auth_key_id, team_id=team_id)
client = APNsClient(credentials=token_credentials, use_sandbox=False)

Notification = collections.namedtuple('Notification', ['token', 'payload'])
notifications = [Notification(payload=payload, token=token_hex)]
client.send_notification_batch(notifications=notifications, topic=topic)
```

--------------------------------

### Basic APNs Notification Sending

Source: https://github.com/pr0ger/pyapns2/blob/master/README.md

Demonstrates how to send a single push notification to APNs using a certificate file for authentication. It includes creating a payload, initializing the APNs client, and sending the notification.

```python
from apns2.client import APNsClient
from apns2.payload import Payload

token_hex = 'b5bb9d8014a0f9b1d61e21e796d78dccdf1352f23cd32812f4850b87'
payload = Payload(alert="Hello World!", sound="default", badge=1)
topic = 'com.example.App'
client = APNsClient('key.pem', use_sandbox=False, use_alternative_port=False)
client.send_notification(token_hex, payload, topic)
```

--------------------------------

### Batch APNs Notification Sending

Source: https://github.com/pr0ger/pyapns2/blob/master/README.md

Shows how to send multiple push notifications to APNs in a single batch request. This is more efficient for sending notifications to many devices simultaneously. It requires preparing a list of notifications, each with a token and payload.

```python
import collections
from apns2.client import APNsClient
from apns2.payload import Payload

token_hex = 'b5bb9d8014a0f9b1d61e21e796d78dccdf1352f23cd32812f4850b87'
payload = Payload(alert="Hello World!", sound="default", badge=1)
topic = 'com.example.App'

Notification = collections.namedtuple('Notification', ['token', 'payload'])
notifications = [Notification(payload=payload, token=token_hex)]
client = APNsClient('key.pem', use_sandbox=False, use_alternative_port=False)
client.send_notification_batch(notifications=notifications, topic=topic)
```

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