Add progression.py, brain_progression.py

Author: DashaChizh

brain_games/games/progression.py

@@ -0,0 +1,25 @@
+from brain_games.engine import run_game
+from brain_games.utils import get_random_num, get_random_length_and_index
+from brain_games.consts import PROGRESSION_INSTRUCTION
+
+
+def get_progression_and_answer():
+    length, index = get_random_length_and_index()
+    step = get_random_num()
+    start = get_random_num()
+    
+    progression = ''
+
+    for i in range(length):
+        if index == i:
+            answer = str(start + i * step)
+            progres_element = '..'
+        else:
+            progres_element = str(start + i * step)
+        progression = progression + ' ' + progres_element
+
+    return progression, answer
+
+
+def run_progression_game():
+    run_game(get_progression_and_answer, PROGRESSION_INSTRUCTION)

brain_games/scripts/brain_progression.py

@@ -0,0 +1,9 @@
+from brain_games.games.progression import run_progression_game
+
+
+def main():
+    run_progression_game()
+    
+    
+if __name__ == "__main__":
+    main()