Fix ModuleNotFoundError in custom_tasks (#17)

- Fix ModuleNotFoundError in custom_tasks (5e44420b1917e92c844c2bae447b5a7b09163bb1)


Co-authored-by: Albert Villanova del Moral <albertvillanova@users.noreply.huggingface.co>

custom_tasks.py

@@ -9,7 +9,6 @@ Author:
 
 from lighteval.tasks.lighteval_task import LightevalTaskConfig
 from lighteval.tasks.requests import Doc
-from lighteval.tasks.tasks_prompt_formatting import LETTER_INDICES
 
 
 ## EVAL WITH NO SUBSET ##
@@ -17,7 +16,7 @@ from lighteval.tasks.tasks_prompt_formatting import LETTER_INDICES
 # attached to it, and one evaluation possible.
 task = LightevalTaskConfig(
     name="myothertask",
-    prompt_function="prompt_fn",  # must be defined in the file or imported from src/lighteval/tasks/tasks_prompt_formatting.py
+    prompt_function="prompt_fn",  # must be defined in the file or imported from lighteval.tasks.default_prompts
     suite=["community"],
     hf_repo="",
     hf_subset="default",
@@ -46,7 +45,7 @@ class CustomSubsetTask(LightevalTaskConfig):
         super().__init__(
             name=name,
             hf_subset=hf_subset,
-            prompt_function="prompt_fn",  # must be defined in the file
+            prompt_function="prompt_fn",  # must be defined in this file or imported from lighteval.tasks.default_prompts
             hf_repo="",
             metric=[""],
             hf_avail_splits=[],
@@ -71,7 +70,7 @@ def prompt_fn(line, task_name: str = None):
     return Doc(
         task_name=task_name,
         query="",
-        choices="",
+        choices=[],
         gold_index=0,
         instruction="",
     )