added some docs for code loading edge case

Author: icweaver

docs/src/pythoncall.md

@@ -308,6 +308,19 @@ To add dependencies to a Julia package, just ensure the package project is activ
 
 See the [CondaPkg.jl](https://github.com/JuliaPy/CondaPkg.jl) documentation.
 
+!!! note
+    If running from a script, make sure that [CondaPkg.jl](https://github.com/JuliaPy/CondaPkg.jl) is used before [PythonCall.jl](https://github.com/JuliaPy/PythonCall.jl) to ensure proper loading of Python packages in your path. E.g.,
+
+    ```julia
+    using CondaPkg
+
+    CondaPkg.add("numpy")
+
+    using PythonCall
+
+    np = pyimport("numpy")
+    ```
+
 ## Writing packages which depend on PythonCall
 
 ### Example