Add fixes for pipx based installs for jiftools

Signed-off-by: Travis F. Collins <travis.collins@analog.com>

Author: tfcollins

adijif/clocks/ad9545.py

@@ -251,7 +251,9 @@ def draw(self, lo: Layout = None) -> str:
         for i in range(2):
             if self.PLL_used[i]:
                 pll_rate = config[f"PLL{i}"].get("rate_hz", 0)
-                pll_node = Node(f"PLL{i}", ntype="voltage-controlled-oscillator")
+                pll_node = Node(
+                    f"PLL{i}", ntype="voltage-controlled-oscillator"
+                )
                 pll_node.shape = "circle"
                 ic_node.add_child(pll_node)
 
@@ -261,7 +263,11 @@ def draw(self, lo: Layout = None) -> str:
                         r_node = ic_node.get_child(f"R{j}")
                         pll_in_rate = self.input_refs[j] / config[f"r{j}"]
                         ic_node.add_connection(
-                            {"from": r_node, "to": pll_node, "rate": pll_in_rate}
+                            {
+                                "from": r_node,
+                                "to": pll_node,
+                                "rate": pll_in_rate,
+                            }
                         )
 
         # Add output Q dividers

adijif/tools/explorer/cli.py

@@ -4,11 +4,14 @@
 import sys
 from typing import Optional
 
-from streamlit.web import cli as stcli
-
 
 def run_streamlit(args: Optional[list[str]] = None) -> None:
     """Run the Streamlit tools explorer app."""
+    # Lazy import: streamlit is an optional dependency (extras: [tools]).
+    # Importing at module level causes pipx installation to fail when streamlit
+    # is not yet installed, even if the [tools] extra is specified.
+    from streamlit.web import cli as stcli  # noqa: PLC0415
+
     # Get the directory where this file is located
     current_dir = os.path.dirname(os.path.abspath(__file__))
     main_file = os.path.join(current_dir, "main.py")