fix: print tree in .tree() method to make it show in terminal mode

docs/nb/Bluetooth sensor.ipynb

@@ -131,9 +131,8 @@
        "        └── MCU\n"
       ]
      },
-     "execution_count": 4,
      "metadata": {},
-     "output_type": "execute_result"
+     "output_type": "display_data"
     }
    ],
    "source": [

src/sysloss/system.py

@@ -26,6 +26,7 @@
 import rustworkx as rx
 import numpy as np
 from rich.tree import Tree
+from rich import print
 import json
 import pandas as pd
 import matplotlib
@@ -436,11 +437,6 @@ def tree(self, name=""):
         name : str, optional
             Name of component to start with. If not given, print the entire system., by default ""
 
-        Returns
-        -------
-        rich.tree.Tree
-            System Tree class.
-
         Raises
         ------
         ValueError
@@ -464,7 +460,7 @@ def tree(self, name=""):
                     c += [j._params["name"]]
                 ndict[i[0]._params["name"]] = c
             t.add(self._make_rtree(ndict, n))
-        return t
+        print(t)
 
     def _set_phase_lkup(self):
         """Make lookup from node # to load phases"""

tests/unit/test_system.py

@@ -61,12 +61,10 @@ def test_case1():
     case1.save("tests/unit/case1.json")
     dfp = case1.params(limits=True)
     assert len(dfp) == rows - 1, "Case1 parameters row count"
-    t = case1.tree()
-    assert type(t) == rich.tree.Tree, "Case1 tree output"
+    assert case1.tree() == None, "Case1 tree output"
     with pytest.raises(ValueError):
         case1.tree("Dummy")
-    t = case1.tree("5V boost")
-    assert type(t) == rich.tree.Tree, "Case1 subtree output"
+    assert case1.tree("5V boost") == None, "Case1 subtree output"
     edata = {"vi": [3.6], "io": [0.1, 0.4, 0.6, 0.9], "eff": [[0.3, 0.4, 0.67, 0.89]]}
     case1.change_comp(
         "1.8V buck", comp=Converter("1.8V buck", vo=1.8, eff=edata, iq=12e-6)