[](https://coveralls.io/github/i386x/vutils-python?branch=main)
# vutils-python: Python Language Tools
This package provides a set of tools to deal with tasks related to Python
language environment, like copying data to or from objects, importing, object
analysis etc.
## Installation
To get `vutils-python`, just type
```sh
$ pip install vutils-python
```
## How To Use
Functions and classes provided by `vutils-python` can be accessed by importing
following submodules:
* `vutils.python.objects`
Each of these submodules is described in the following subsections.
### Objects Manipulation
Functions and classes that deals with Python objects, defined in
`vutils.python.objects` submodule, are
* `merge_data(dest, src)` merges data from `src` to `dest`. `src` and `dest`
must be of the same type. Examples:
```python
src = [1, 2, 3]
dest = [1, 2]
merge_data(dest, src)
# dest will be [1, 2, 1, 2, 3]
src = {1, 2, 3}
dest = {2, 4}
merge_data(dest, src)
# dest will be {1, 2, 3, 4}
src = {"a": "bc", 1: 2}
dest = {1: "a", "b": "c"}
merge_data(dest, src)
# dest will be {1: 2, "a": "bc", "b": "c"}
merge_data({}, [1]) # TypeError
```
* `ensure_key(mapping, key, default)` ensures `mapping` has a `key` of the same
type a `default`. If `key` is not in `mapping`, store `default` to `mapping`
under it.
* `ensure_no_key(mapping, key)` ensures `key` is not present in `mapping`.
* `flatten(obj)` flattens `obj` recursively if it is `list` or `tuple`.
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