pythonish-validator 0.3

Pythonish object scheme validator

# pythonish-validator

[](https://travis-ci.org/bugov/pythonish-validator)

Data validation library for Python without complex schemas.
It's how you write Python code:

```Python
from pythonish_validator.common import Validator

validator = Validator({
'name': str,
'age': int,
'skills': [str]
})

validator.is_valid({
'name': 'Georgy',
'age': 29,
'skills': ['Python', 'Perl', 'C']
})
```

What can be easier?

# Install

```bash
pip3 install pythonish-validator
```

## Error messages

```Python
from pythonish_validator.common import validate

validator = validate({
'name': str,
'age': int,
'skills': [str]
}, {
'name': 'Georgy',
'age': None,
'skills': ['Python', 'Perl', 42]
})

assert validator.repr_errors() == [
"{'age'}->NoneType(None)",
"{'skills'}->[2]->int(42)"
]
```

## Features

🗣️ Speak the language of Python classes:

```Python
from pythonish_validator.common import Validator


class User:
__validation_schema__ = {
'id': int,
'name': str
}


validator = Validator({
"users": [User]
})

# valid structure
validator.is_valid({
"users": [
{'id': 1, 'name': 'Alice'},
{'id': 2, 'name': 'Bob'},
]
})

# invalid structure
validator.is_valid({
"users": [
{'id': '1', 'name': 'Alice'},
{'id': 2},
]
})

assert validator.repr_errors() == [
"{'users'}->[0]->{'id'}->str('1')",
"{'users'}->[1]->{'name'}",
]
```

🎓 And even custom validation:

```Python
import re

from pythonish_validator.common import Validator


class EmailType:
@staticmethod
def __validation_schema__(data):
if not isinstance(data, str):
return False

if re.match(r'\w+@\w+.\w{2,5}', data) is None:
return False

return True


class User:
__validation_schema__ = {
'id': int,
'name': str,
'email': EmailType,
}


validator = Validator({
"users": [User]
})

validator.is_valid({
"users": [
{'id': 1, 'name': 'Alice', 'email': '[e-mail]'},
{'id': 2, 'name': 'Bob', 'email': '[e-mail]'},
]
})
```

If you find any mistake – please write to the [issue list 🐨](https://github.com/bugov/pythonish-validator/issues).