Python3

Work in progress.

Thinks, that have automated tests works.

The template is broken, don't know why.

**UPDATE:** the template works, there was a problem in my browser-cache
Care about the extra newline in your testfile. I think, this is not your test case. Maybe use
```python
csv_file = BytesIO(bytes("""\
"Title";"First Name";"Last Name";"Gender";"Email";...
Here comes the first participant, which is the second line of the file ...
Here comes the second participant, which is the third line of the file ...
"""

```