### Set up local development environment

Source: https://github.com/danifus/pyzipper/blob/master/CONTRIBUTING.rst

Commands to create a virtual environment and install dependencies for development.

```shell
$ mkvirtualenv pyzipper
$ cd pyzipper/
$ pip install -e .
$ pip install -r requirements_dev.txt
```

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

### Install pyzipper

Source: https://github.com/danifus/pyzipper/blob/master/README.rst

Install the pyzipper library using pip.

```bash
pip install pyzipper
```

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

### Conditionally Include CRC32 Values

Source: https://github.com/danifus/pyzipper/blob/master/README.rst

Example of how to conditionally include CRC32 values for files based on their uncompressed size. The minimum size to include CRC is set to 20 bytes.

```python
with pyzipper.AESZipFile(
    'new_test.zip',
    'w',
    compression=pyzipper.ZIP_LZMA,
) as zf:
    zf.setencryption(
        pyzipper.WZ_AES,
        conditionally_include_crc=True,
        min_bytes_to_include_crc=<minimum uncompressed bytes to include crc>,
    )
    ...
```

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

### Deploy new version

Source: https://github.com/danifus/pyzipper/blob/master/CONTRIBUTING.rst

Commands for maintainers to bump the version and push tags to trigger deployment.

```shell
$ bumpversion patch # possible: major / minor / patch
$ git push
$ git push --tags
```

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

### Basic Usage: Create and Read Encrypted Zip

Source: https://github.com/danifus/pyzipper/blob/master/README.rst

Demonstrates how to create a new AES encrypted zip file and then read from it. Requires setting a password and specifying encryption details.

```python
import pyzipper

secret_password = b'lost art of keeping a secret'

with pyzipper.AESZipFile('new_test.zip',
                        'w',
                        compression=pyzipper.ZIP_LZMA,
                        encryption=pyzipper.WZ_AES) as zf:
    zf.setpassword(secret_password)
    zf.writestr('test.txt', "What ever you do, don't tell anyone!")

with pyzipper.AESZipFile('new_test.zip') as zf:
    zf.setpassword(secret_password)
    my_secrets = zf.read('test.txt')
```

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

### Create a development branch

Source: https://github.com/danifus/pyzipper/blob/master/CONTRIBUTING.rst

Command to switch to a new branch for implementing changes.

```shell
$ git checkout -b name-of-your-bugfix-or-feature
```

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

### Clone the pyzipper repository

Source: https://github.com/danifus/pyzipper/blob/master/CONTRIBUTING.rst

Use this command to create a local copy of the repository from your fork.

```shell
$ git clone git@github.com:your_name_here/pyzipper.git
```

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

### Commit and push changes

Source: https://github.com/danifus/pyzipper/blob/master/CONTRIBUTING.rst

Commands to stage, commit, and push local changes to the remote repository.

```shell
$ git add .
$ git commit -m "Your detailed description of your changes."
$ git push origin name-of-your-bugfix-or-feature
```

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

### Run a subset of tests

Source: https://github.com/danifus/pyzipper/blob/master/CONTRIBUTING.rst

Execute specific tests using py.test.

```shell
$ py.test tests.test_pyzipper
```

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

### Run tests with tox

Source: https://github.com/danifus/pyzipper/blob/master/CONTRIBUTING.rst

Execute tests across multiple Python versions using tox.

```shell
$ tox
```

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

### Configure AES Encryption Strength

Source: https://github.com/danifus/pyzipper/blob/master/README.rst

Shows how to set the AES encryption strength (128, 192, or 256 bits) when creating an encrypted zip file. Defaults to 256 bits.

```python
import pyzipper

secret_password = b'lost art of keeping a secret'

with pyzipper.AESZipFile('new_test.zip',
                        'w',
                        compression=pyzipper.ZIP_LZMA) as zf:
    zf.setpassword(secret_password)
    zf.setencryption(pyzipper.WZ_AES, nbits=256)
    zf.writestr('test.txt', "What ever you do, don't tell anyone!")

with pyzipper.AESZipFile('new_test.zip') as zf:
    zf.setpassword(secret_password)
    my_secrets = zf.read('test.txt')
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.