Curses could not find terminal

[Solstice]

I want to start programming with the module curses in Python on my
Raspberry pi3(with rasbian), But I already ran into a problem.

I wrote my first 2 lines of code in IDLE3 and executed them:

import curses
stdscr = curses.initscreen

but I got this output:

Output:
Traceback (most recent call last):
  File "/home/pi/Desktop/programms/Tools/curse.py", line 3, in <module>
    curses.initscr()
  File "/usr/lib/python3.5/curses/__init__.py", line 30, in initscr
    fd=_sys.__stdout__.fileno())
_curses.error: setupterm: could not find terminal

I already know that there is the way to execute it in the linux terminal,
but it would be just way to much work if I want to test some code every 10 seconds and I have no Idea how to even do that.
If there is no other way, i'll do it with the linux terminal, if someone could
explain it to me (please :) ).