### Configure PyCha Chart Template

Source: https://relatorio.readthedocs.io/en/latest/indepthexample.html

Defines chart options and dataset structure using a YAML-based TextTemplate compatible with PyCha.

```yaml
options:
    width: 600
    height: 400
    background: {hide: true}
    legend: {hide: true}
    axis: {labelFontSize: 14}
    padding: {bottom: 10, left: 10, right: 10, top: 10}
chart:
    type: pie
    output_type: png
    dataset:
    {% for line in o.lines %}
      - - ${line.item.name}
        - - [0, $line.amount]
    {% end %}
```

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

### Generate Basic ODT Report with Relatorio

Source: https://relatorio.readthedocs.io/en/latest/indepthexample.html

Creates a basic OpenDocument Text (ODT) report using a predefined template. It binds the invoice data to the template and renders the output to a file.

```python
from relatorio.templates.opendocument import Template
basic = Template(source='', filepath='basic.odt')
file('bonham_basic.odt', 'wb').write(basic.generate(o=inv).render().getvalue())

```

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

### Generate ODT Document

Source: https://relatorio.readthedocs.io/en/latest/quickexample.html

Use the Relatorio Template engine to generate an ODT file from a template and the previously defined invoice data. The output is rendered to a StringIO object and then written to a file.

```python
from relatorio.templates.opendocument import Template
from data import bonham_invoice
basic = Template(source='', filepath='basic.odt')
basic_generated = basic.generate(o=bonham_invoice).render()
file('bonham_basic.odt', 'wb').write(basic_generated.getvalue())

```

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

### Define Invoice Data Object

Source: https://relatorio.readthedocs.io/en/latest/quickexample.html

Create a Python class to represent invoice data, including properties for total and VAT. This object will be used to populate the ODT template.

```python
from os.path import dirname, join


class Invoice(dict):

    @property
    def total(self):
        return sum(line['amount'] for line in self['lines'])

    @property
    def vat(self):
        return self.total * 0.21


inv = Invoice(customer={'name': 'John Bonham',
                        'address': {'street': 'Smirnov street',
                                    'zip': 1000,
                                    'city': 'Montreux'}},
              lines=[{'item': {'name': 'Vodka 70cl',
                               'reference': 'VDKA-001',
                               'price': 10.34},
                      'quantity': 7,
                      'amount': 7 * 10.34},
                     {'item': {'name': 'Cognac 70cl',
                               'reference': 'CGNC-067',
                               'price': 13.46},
                      'quantity': 12,
                      'amount': 12 * 13.46},
                     {'item': {'name': 'Sparkling water 25cl',
                               'reference': 'WATR-007',
                               'price': 4},
                      'quantity': 1,
                      'amount': 4},
                     {'item': {'name': 'Good customer',
                               'reference': 'BONM-001',
                               'price': -20},
                      'quantity': 1,
                      'amount': -20},
                    ],
              id='MZY-20080703',
              status='late',
              bottle=(open(join(dirname(__file__), 'bouteille.png'), 'rb'),
                  'image/png'))

```

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