# The PyURANIE interface

In the previous example, we can see that the access to {{uranie}}'s classes is somewhat tedious. In 
order to ease the process, a set of specific modules have been created. We call it the *PyURANIE 
interface*.

It is then possible to re-write the previous example using these specific modules:

{{
    "```{literalinclude} " + parent_dir 
    + "/roottest/uranie/doc/overview/python/example_pyuranie.py\n"
    + ":language: python\n"
    + ":lines: 1-6,11-24\n"
    + "```"
}}

The access to {{root}} classes is provided through the ROOT module.

The PyURANIE interface also allows to use the command:

```python
from URANIE.DataServer import *
```

This command loads all the classes of the DataServer module in Python and makes them directly 
accessible. It is similar to the C++ command *using namespace URANIE::DataServer*. However, in 
Python, using this command is not recommended. It can create name conflicts and use a large amount 
of memory.
        
Finally the equivalent of the `rootlogon.C` has been written for python, and is called `rootlogon.py`. 
It is composed of two parts, as for the one in C++, the second one being the exact equivalent. The 
first one, on the other hand, is a bit different and this difference arises from the way the language 
are dealing with loading modules. By doing 

```python
from rootlogon import DataServer
```

one can, for instance, directly creates a `TDataServer` by doing 

```python
toto=DataServer.TDataServer()
```

The example of rootlogon file for python is the following:

{{
    "```{literalinclude} " + parent_dir 
    + "/roottest/uranie/doc/overview/use_cases/python/rootlogon.py\n"
    + ":language: python\n"
    + "```"
}}