Update `heatmap_data` function: remove extraneous data

Issue:
https://github.com/genenetwork/gn-gemtext-threads/blob/main/topics/gn1-migration-to-gn2/clustering.gmi

* gn3/computations/heatmap.py: update function
* gn3/db/traits.py: new function

  Remove extraneous data and arguments from the function.
  - Load the genotype file
  - Generate traits file
  - Provide both raw traits data, and exported traits data in return

1 files changed, 5 insertions, 0 deletions

diff --git a/gn3/db/traits.py b/gn3/db/traits.py
index 1031e44..ccb101a 100644
--- a/gn3/db/traits.py
+++ b/gn3/db/traits.py
@@ -1,4 +1,5 @@
 """This class contains functions relating to trait data manipulation"""
+from gn3.settings import TMPDIR
 from typing import Any, Dict, Union, Sequence
 from gn3.function_helpers import compose
 from gn3.db.datasets import retrieve_trait_dataset
@@ -666,3 +667,7 @@ def retrieve_trait_data(trait: dict, conn: Any, strainlist: Sequence[str] = tupl
                     {k:v for k, v in x.items() if x != "strain_name"}),
                 data))}
     return {}
+
+def generate_traits_filename(base_path: str = TMPDIR):
+    return "{}/traits_test_file_{}.txt".format(
+        os.path.abspath(base_path), random_string(10))