Skip to main content

evaluation - How to reliably reload package after change?



I'm using IntelliJ Idea with a Mathematica plugin to develop Mathematica application. I keep IntelliJ and Mathematica opened at the same time. I would like to change something in the IDE, evaluate notebook in the Mathematica and see updated result, but Mathematica fails to see changes in my code.


My application consists of several subpackages, and Kernel/init.m looks like


Get["MyPackage`A`"]
Get["MyPackage`B`"]

...

Notebook is something like


Quit[]
Get["MyPackage`"]
SomeFunctionFromMyPackage[]

And I've also tried


Needs["Utilities`CleanSlate`"] (* inside initialization cell *)
CleanSlate[]

Get["MyPackage`"]
SomeFunctionFromMyPackage[]

Let's say I changed SomeFunctionFromMyPackage, saved .m file` hit "Evaluate notebook" and hoping to see result changing, but this doesn't happen. Result is not getting updated. I've tried to introduce syntax error in function, Mathematica doesn't react at all.


The only way to force Mathematica to actually reload my package is to restart it.


It's driving me crazy, what am I doing wrong?


Upd


Such strange problems were caused by the fact that subpackages inside application depend on each other with Needs instead of Get. When I changed it to Get the problems went away.



Answer



There isn't a fully general way to reload packages because packages can do just about anything in principle, not just create definitions.



I recommend that you write your package in a way that simply using Get again will properly re-set its state. Assuming that all your package does is issue definitions, you could do something like this:


BeginPackage["MyPack`"];

Unprotect["MyPack`*"];
ClearAll["MyPack`*"];
ClearAll["MyPack`Private`*"];

Foo::usage = "";

Begin["`Private`"];


helper[x_] := x^2
Foo[x_] := 2*helper[x]

End[];
Protect["MyPack`*"];
EndPackage[];

But in general there's a lot more a package can do than issue definitions. For example, it can cache results (MaTeX), it can load or save some persistent configuration (MaTeX, MATLink), it can create temporary files and directories to work with, or some other kind of state that persists throughout the session, such as connecting to other programs (MATLink), it may load LibraryLink functions that must be unloaded before they can be safely reloaded (IGraph/M), etc. My point is that most packages that I contributed to had something else than definitions in them that made reloading problematic. Thus not all of them will fully reset their state when using Get a second time, and sometimes I just need to manually quit the kernel before loading them again. But I do try to build in some robustness against reloading to make development easier (and accidental double loading by users should definitely not break things).


Comments

Post a Comment

Popular posts from this blog

plotting - How to draw lines between specified dots on ListPlot?

I would like to create a plot where I have unconnected dots and some connected. So far, I have figured out how to draw the dots. My code is the following: ListPlot[{{1, 1}, {2, 2}, {3, 3}, {4, 4}, {1, 4}, {2, 5}, {3, 6}, {4, 7}, {1, 7}, {2, 8}, {3, 9}, {4, 10}, {1, 10}, {2, 11}, {3, 12}, {4,13}, {2.5, 7}}, Ticks -> {{1, 2, 3, 4}, None}, AxesStyle -> Thin, TicksStyle -> Directive[Black, Bold, 12], Mesh -> Full] I have thought using ListLinePlot command, but I don't know how to specify to the command to draw only selected lines between the dots. Do have any suggestions/hints on how to do that? Thank you. Answer One possibility would be to use Epilog with Line : ListPlot[ {{1, 1}, {2, 2}, {3, 3}, {4, 4}, {1, 4}, {2, 5}, {3, 6}, {4, 7}, {1, 7}, {2, 8}, {3, 9}, {4, 10}, {1, 10}, {2, 11}, {3, 12}, {4, 13}, {2.5, 7}}, Ticks -> {{1, 2, 3, 4}, None}, AxesStyle -> Thin, TicksStyle -> Directive[Black, Bold, 12], Mesh -> Full, Epilog -> { Line[ ...
Post a Comment
Read more

equation solving - Invert and fit implicitly defined curve

I need to fit an implicitly defined curve. I thought I could get some data out of Solve , and then using FindFit . Therefore, I would like to find the relation the parametric curve defined by $F(x,y)=0$: Solve[-(1/2) + 1/2 (0.41202 BesselK[0, 0.1 Sqrt[x^2 + y^2]] + (0.101483 x BesselK[1, 0.1 Sqrt[x^2 + y^2]])/Sqrt[x^2 + y^2]) == 0, y] But I can't get an output: Solve was unable to solve the system with inexact coefficients or the system obtained by direct rationalization of inexact numbers present in the system. Since many of the methods used by Solve require exact input, providing Solve with an exact version of the system may help. >> Edit: In particular, I would like to fit the data coming from the curve with the expression of another curve, and not with a function $f(x)$. In particular, since this clearly looks like a cardioid , I would like it to fit to something like it. What other strategies could I try?
Post a Comment
Read more

dynamic - How can I make a clickable ArrayPlot that returns input?

I would like to create a dynamic ArrayPlot so that the rectangles, when clicked, provide the input. Can I use ArrayPlot for this? Or is there something else I should have to use? Answer ArrayPlot is much more than just a simple array like Grid : it represents a ranged 2D dataset, and its visualization can be finetuned by options like DataReversed and DataRange . These features make it quite complicated to reproduce the same layout and order with Grid . Here I offer AnnotatedArrayPlot which comes in handy when your dataset is more than just a flat 2D array. The dynamic interface allows highlighting individual cells and possibly interacting with them. AnnotatedArrayPlot works the same way as ArrayPlot and accepts the same options plus Enabled , HighlightCoordinates , HighlightStyle and HighlightElementFunction . data = {{Missing["HasSomeMoreData"], GrayLevel[ 1], {RGBColor[0, 1, 1], RGBColor[0, 0, 1], GrayLevel[1]}, RGBColor[0, 1, 0]}, {GrayLevel[0], GrayLevel...
Post a Comment
Read more