# list

Utils for handling list.

## list.uniq
```python
uniq(seq, key=None)
```

Removes duplicate elements from a list while preserving the order of the rest.

The value of the optional `key` parameter should be a function that
takes a single argument and returns a key to test the uniqueness.

```python
>>> from pydu.list import uniq
>>> uniq([1, 4, 0, 2, 0, 3])
[1, 4, 0, 2, 3]
```


## list.tolist
```python
tolist(obj)
```

Convert given `obj` to list.

If `obj` is not a list, return `[obj]`, else return `obj` itself.

```python
>>> from pydu.list import tolist
>>> tolist('foo')
['foo']
```


## list.flatten
```python
flatten(seq)
```

Generate each element of the given `seq`. If the element is iterable and
is not string, it yields each sub-element of the element recursively.

```python
>>> from pydu.list import flatten
>>> flatten([1, [2, [3, 4]]])
[1, 2, 3, 4]
```