Strange behavior of Out[]
$begingroup$
Let's create two notebooks external.nb and primary.nb. Then call the external.nb notebook from the primary.nb and investigate values of Out[ ]. The context of the external notebook is not important, however for the demonstration of the strange behavior it should contain number of cells. My external.nb notebook contains 4 cells:
a=1;
b=1
c=1
d
The primary notebook contains the single cell which calls the external notebook from the primary. If we put both notebooks in the same directory, the cell is
NotebookEvaluate @ FileNameJoin[
{ NotebookDirectory[EvaluationNotebook], "external.nb"}
]
Open the primary.nb and evaluate the cell which calls the evaluation of the external.nb.
The output yields
Out[1] = d
So it returns output of the last cell of the called notebook.
Now refer to input %4
of primary.nb. I would expect an empty output, since at the moment there is no %4
out in the primary notebook. However the result is the same d
.
Asking
?? Out
we see the primary.nb knows all Out
values of the external.nb notebook. Bug or feature?
front-end kernel
$endgroup$
add a comment |
$begingroup$
Let's create two notebooks external.nb and primary.nb. Then call the external.nb notebook from the primary.nb and investigate values of Out[ ]. The context of the external notebook is not important, however for the demonstration of the strange behavior it should contain number of cells. My external.nb notebook contains 4 cells:
a=1;
b=1
c=1
d
The primary notebook contains the single cell which calls the external notebook from the primary. If we put both notebooks in the same directory, the cell is
NotebookEvaluate @ FileNameJoin[
{ NotebookDirectory[EvaluationNotebook], "external.nb"}
]
Open the primary.nb and evaluate the cell which calls the evaluation of the external.nb.
The output yields
Out[1] = d
So it returns output of the last cell of the called notebook.
Now refer to input %4
of primary.nb. I would expect an empty output, since at the moment there is no %4
out in the primary notebook. However the result is the same d
.
Asking
?? Out
we see the primary.nb knows all Out
values of the external.nb notebook. Bug or feature?
front-end kernel
$endgroup$
$begingroup$
The kernel state (including In/Out values) is not local to notebooks. This is expected.
$endgroup$
– Szabolcs
yesterday
$begingroup$
That is clear, however why then not to continue the enumeration from the last Out[ ] value the kernel knows in the new notebook? I find this confusing.
$endgroup$
– user18792
yesterday
$begingroup$
Right, now I see what you mean.primary.nb
keeps counting up from 1, yet higher input line values are already set inOut
thanks toexternal.nb
. It is indeed strange.
$endgroup$
– Szabolcs
yesterday
add a comment |
$begingroup$
Let's create two notebooks external.nb and primary.nb. Then call the external.nb notebook from the primary.nb and investigate values of Out[ ]. The context of the external notebook is not important, however for the demonstration of the strange behavior it should contain number of cells. My external.nb notebook contains 4 cells:
a=1;
b=1
c=1
d
The primary notebook contains the single cell which calls the external notebook from the primary. If we put both notebooks in the same directory, the cell is
NotebookEvaluate @ FileNameJoin[
{ NotebookDirectory[EvaluationNotebook], "external.nb"}
]
Open the primary.nb and evaluate the cell which calls the evaluation of the external.nb.
The output yields
Out[1] = d
So it returns output of the last cell of the called notebook.
Now refer to input %4
of primary.nb. I would expect an empty output, since at the moment there is no %4
out in the primary notebook. However the result is the same d
.
Asking
?? Out
we see the primary.nb knows all Out
values of the external.nb notebook. Bug or feature?
front-end kernel
$endgroup$
Let's create two notebooks external.nb and primary.nb. Then call the external.nb notebook from the primary.nb and investigate values of Out[ ]. The context of the external notebook is not important, however for the demonstration of the strange behavior it should contain number of cells. My external.nb notebook contains 4 cells:
a=1;
b=1
c=1
d
The primary notebook contains the single cell which calls the external notebook from the primary. If we put both notebooks in the same directory, the cell is
NotebookEvaluate @ FileNameJoin[
{ NotebookDirectory[EvaluationNotebook], "external.nb"}
]
Open the primary.nb and evaluate the cell which calls the evaluation of the external.nb.
The output yields
Out[1] = d
So it returns output of the last cell of the called notebook.
Now refer to input %4
of primary.nb. I would expect an empty output, since at the moment there is no %4
out in the primary notebook. However the result is the same d
.
Asking
?? Out
we see the primary.nb knows all Out
values of the external.nb notebook. Bug or feature?
front-end kernel
front-end kernel
edited yesterday
Kuba♦
107k12210530
107k12210530
asked yesterday
user18792user18792
1,785915
1,785915
$begingroup$
The kernel state (including In/Out values) is not local to notebooks. This is expected.
$endgroup$
– Szabolcs
yesterday
$begingroup$
That is clear, however why then not to continue the enumeration from the last Out[ ] value the kernel knows in the new notebook? I find this confusing.
$endgroup$
– user18792
yesterday
$begingroup$
Right, now I see what you mean.primary.nb
keeps counting up from 1, yet higher input line values are already set inOut
thanks toexternal.nb
. It is indeed strange.
$endgroup$
– Szabolcs
yesterday
add a comment |
$begingroup$
The kernel state (including In/Out values) is not local to notebooks. This is expected.
$endgroup$
– Szabolcs
yesterday
$begingroup$
That is clear, however why then not to continue the enumeration from the last Out[ ] value the kernel knows in the new notebook? I find this confusing.
$endgroup$
– user18792
yesterday
$begingroup$
Right, now I see what you mean.primary.nb
keeps counting up from 1, yet higher input line values are already set inOut
thanks toexternal.nb
. It is indeed strange.
$endgroup$
– Szabolcs
yesterday
$begingroup$
The kernel state (including In/Out values) is not local to notebooks. This is expected.
$endgroup$
– Szabolcs
yesterday
$begingroup$
The kernel state (including In/Out values) is not local to notebooks. This is expected.
$endgroup$
– Szabolcs
yesterday
$begingroup$
That is clear, however why then not to continue the enumeration from the last Out[ ] value the kernel knows in the new notebook? I find this confusing.
$endgroup$
– user18792
yesterday
$begingroup$
That is clear, however why then not to continue the enumeration from the last Out[ ] value the kernel knows in the new notebook? I find this confusing.
$endgroup$
– user18792
yesterday
$begingroup$
Right, now I see what you mean.
primary.nb
keeps counting up from 1, yet higher input line values are already set in Out
thanks to external.nb
. It is indeed strange.$endgroup$
– Szabolcs
yesterday
$begingroup$
Right, now I see what you mean.
primary.nb
keeps counting up from 1, yet higher input line values are already set in Out
thanks to external.nb
. It is indeed strange.$endgroup$
– Szabolcs
yesterday
add a comment |
1 Answer
1
active
oldest
votes
$begingroup$
I am guessing that this has to do with the following note in the NotebookEvaluate
documentation:
The cells of the notebook are evaluated in a dialog subsession.
Here is an example session demonstrating similar behaviour:
See Dialog
if you are not familiar with it.
Within the dialog, $Line
keeps getting incremented as usual, and Out
values are set. But once the dialog finishes, $Line
is reset to its original value.
This is documented:
Dialog automatically localizes the values of
$Line
,$MessageList
, and$Epilog
.
Side note: A dialog is something you would normally encounter not when explicitly entering it, but when interrupting evaluation or when debugging (say, you set the debugger to break on a message/assert). Try e.g. Do[Pause[1], {i, 30}]
, then interrupt using Alt-,
(Option-Command-.
on Mac). Now you can evaluate i
to check its value, or examine the kernel state in other ways. Exit the dialog using Return
. It is natural that one would not want these evaluations to influence $Line
once the dialog has finished.
$endgroup$
$begingroup$
Since the behavior is documented I conclude this is the intended design feature. I use NotebookEvaluate for package development, because it is much more convenient way to add new definitions and navigate in the many cell notebook than in plain .m file. I think I will try to add Clear[Out] as the last cell in the external.nb.
$endgroup$
– user18792
16 hours ago
$begingroup$
@user18792 You can edit an.m
file as if it were a notebook. You can add section cells and text cells. You can close and open section cells. Try it.
$endgroup$
– Szabolcs
15 hours ago
add a comment |
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active
oldest
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oldest
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oldest
votes
$begingroup$
I am guessing that this has to do with the following note in the NotebookEvaluate
documentation:
The cells of the notebook are evaluated in a dialog subsession.
Here is an example session demonstrating similar behaviour:
See Dialog
if you are not familiar with it.
Within the dialog, $Line
keeps getting incremented as usual, and Out
values are set. But once the dialog finishes, $Line
is reset to its original value.
This is documented:
Dialog automatically localizes the values of
$Line
,$MessageList
, and$Epilog
.
Side note: A dialog is something you would normally encounter not when explicitly entering it, but when interrupting evaluation or when debugging (say, you set the debugger to break on a message/assert). Try e.g. Do[Pause[1], {i, 30}]
, then interrupt using Alt-,
(Option-Command-.
on Mac). Now you can evaluate i
to check its value, or examine the kernel state in other ways. Exit the dialog using Return
. It is natural that one would not want these evaluations to influence $Line
once the dialog has finished.
$endgroup$
$begingroup$
Since the behavior is documented I conclude this is the intended design feature. I use NotebookEvaluate for package development, because it is much more convenient way to add new definitions and navigate in the many cell notebook than in plain .m file. I think I will try to add Clear[Out] as the last cell in the external.nb.
$endgroup$
– user18792
16 hours ago
$begingroup$
@user18792 You can edit an.m
file as if it were a notebook. You can add section cells and text cells. You can close and open section cells. Try it.
$endgroup$
– Szabolcs
15 hours ago
add a comment |
$begingroup$
I am guessing that this has to do with the following note in the NotebookEvaluate
documentation:
The cells of the notebook are evaluated in a dialog subsession.
Here is an example session demonstrating similar behaviour:
See Dialog
if you are not familiar with it.
Within the dialog, $Line
keeps getting incremented as usual, and Out
values are set. But once the dialog finishes, $Line
is reset to its original value.
This is documented:
Dialog automatically localizes the values of
$Line
,$MessageList
, and$Epilog
.
Side note: A dialog is something you would normally encounter not when explicitly entering it, but when interrupting evaluation or when debugging (say, you set the debugger to break on a message/assert). Try e.g. Do[Pause[1], {i, 30}]
, then interrupt using Alt-,
(Option-Command-.
on Mac). Now you can evaluate i
to check its value, or examine the kernel state in other ways. Exit the dialog using Return
. It is natural that one would not want these evaluations to influence $Line
once the dialog has finished.
$endgroup$
$begingroup$
Since the behavior is documented I conclude this is the intended design feature. I use NotebookEvaluate for package development, because it is much more convenient way to add new definitions and navigate in the many cell notebook than in plain .m file. I think I will try to add Clear[Out] as the last cell in the external.nb.
$endgroup$
– user18792
16 hours ago
$begingroup$
@user18792 You can edit an.m
file as if it were a notebook. You can add section cells and text cells. You can close and open section cells. Try it.
$endgroup$
– Szabolcs
15 hours ago
add a comment |
$begingroup$
I am guessing that this has to do with the following note in the NotebookEvaluate
documentation:
The cells of the notebook are evaluated in a dialog subsession.
Here is an example session demonstrating similar behaviour:
See Dialog
if you are not familiar with it.
Within the dialog, $Line
keeps getting incremented as usual, and Out
values are set. But once the dialog finishes, $Line
is reset to its original value.
This is documented:
Dialog automatically localizes the values of
$Line
,$MessageList
, and$Epilog
.
Side note: A dialog is something you would normally encounter not when explicitly entering it, but when interrupting evaluation or when debugging (say, you set the debugger to break on a message/assert). Try e.g. Do[Pause[1], {i, 30}]
, then interrupt using Alt-,
(Option-Command-.
on Mac). Now you can evaluate i
to check its value, or examine the kernel state in other ways. Exit the dialog using Return
. It is natural that one would not want these evaluations to influence $Line
once the dialog has finished.
$endgroup$
I am guessing that this has to do with the following note in the NotebookEvaluate
documentation:
The cells of the notebook are evaluated in a dialog subsession.
Here is an example session demonstrating similar behaviour:
See Dialog
if you are not familiar with it.
Within the dialog, $Line
keeps getting incremented as usual, and Out
values are set. But once the dialog finishes, $Line
is reset to its original value.
This is documented:
Dialog automatically localizes the values of
$Line
,$MessageList
, and$Epilog
.
Side note: A dialog is something you would normally encounter not when explicitly entering it, but when interrupting evaluation or when debugging (say, you set the debugger to break on a message/assert). Try e.g. Do[Pause[1], {i, 30}]
, then interrupt using Alt-,
(Option-Command-.
on Mac). Now you can evaluate i
to check its value, or examine the kernel state in other ways. Exit the dialog using Return
. It is natural that one would not want these evaluations to influence $Line
once the dialog has finished.
answered yesterday
SzabolcsSzabolcs
162k14443941
162k14443941
$begingroup$
Since the behavior is documented I conclude this is the intended design feature. I use NotebookEvaluate for package development, because it is much more convenient way to add new definitions and navigate in the many cell notebook than in plain .m file. I think I will try to add Clear[Out] as the last cell in the external.nb.
$endgroup$
– user18792
16 hours ago
$begingroup$
@user18792 You can edit an.m
file as if it were a notebook. You can add section cells and text cells. You can close and open section cells. Try it.
$endgroup$
– Szabolcs
15 hours ago
add a comment |
$begingroup$
Since the behavior is documented I conclude this is the intended design feature. I use NotebookEvaluate for package development, because it is much more convenient way to add new definitions and navigate in the many cell notebook than in plain .m file. I think I will try to add Clear[Out] as the last cell in the external.nb.
$endgroup$
– user18792
16 hours ago
$begingroup$
@user18792 You can edit an.m
file as if it were a notebook. You can add section cells and text cells. You can close and open section cells. Try it.
$endgroup$
– Szabolcs
15 hours ago
$begingroup$
Since the behavior is documented I conclude this is the intended design feature. I use NotebookEvaluate for package development, because it is much more convenient way to add new definitions and navigate in the many cell notebook than in plain .m file. I think I will try to add Clear[Out] as the last cell in the external.nb.
$endgroup$
– user18792
16 hours ago
$begingroup$
Since the behavior is documented I conclude this is the intended design feature. I use NotebookEvaluate for package development, because it is much more convenient way to add new definitions and navigate in the many cell notebook than in plain .m file. I think I will try to add Clear[Out] as the last cell in the external.nb.
$endgroup$
– user18792
16 hours ago
$begingroup$
@user18792 You can edit an
.m
file as if it were a notebook. You can add section cells and text cells. You can close and open section cells. Try it.$endgroup$
– Szabolcs
15 hours ago
$begingroup$
@user18792 You can edit an
.m
file as if it were a notebook. You can add section cells and text cells. You can close and open section cells. Try it.$endgroup$
– Szabolcs
15 hours ago
add a comment |
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$begingroup$
The kernel state (including In/Out values) is not local to notebooks. This is expected.
$endgroup$
– Szabolcs
yesterday
$begingroup$
That is clear, however why then not to continue the enumeration from the last Out[ ] value the kernel knows in the new notebook? I find this confusing.
$endgroup$
– user18792
yesterday
$begingroup$
Right, now I see what you mean.
primary.nb
keeps counting up from 1, yet higher input line values are already set inOut
thanks toexternal.nb
. It is indeed strange.$endgroup$
– Szabolcs
yesterday