PyInstaller and PuLP

[Lucas Guido]

Dear gentlemen,

I modeled and programmed a LP with PuLP 1.6 over Python 3.5.2, working perfectly when I run the script. Nice!

Now my challenge is putting it in a EXE file, and for this I'm using PyInstaller. Here I have some trouble.
I receive the following error message when trying to run my EXE:

[...]
   File "site-packages\pulp\pulp.py", line 1643, in solve
AttributeError: 'NoneType' object has no attribute 'actualSolve'
Failed to execute script myLP

My best guess is that compiled code don't have success on finding standard solver, so I need to manually point it in my code.
Am I right? How would I do it?

For me would be very interesting, if possible, not to install a solver or deal with environment variables. Best case would be download the solver and point the file inside the code (for example C:/folder1/folder2/solver.xyz).

Note 1: Code works perfecty when runed as script, including the solver. The problem happens only when I run it as EXE.
Note 2: The problem isn't numpy or related libraries, I already checked it out.

Please, light my path.

Tks in advance!
Lucas Guido

[Stuart Mitchell]

you can point to a particular version of the standard solver (cbc) when you use the COIN_CMD solver

prob.solve(COIN_CMD(path = "C:/folder1/folder2/solver.xyz"))

hope this helps

Stu

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Stuart Mitchell

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Extraordinary Freelance Programmer and Optimisation Guru

www.stuartmitchell.com

[Lucas Guido]

Hi Stu,

Here is what I did:

1. I downloaded CBC binary from http://www.coin-or.org/download/binary/Cbc/ and, in my case, I selected Cbc-2.7.5-win64-intel11.1.zip
2. I coded as follows:

import os
cwd = os.getcwd()
solverdir = 'cbc-2.7.5-win64\\bin\\cbc.exe'  # extracted and renamed CBC solver binary
solverdir = os.path.join(cwd, solverdir)
solver = pulp.COIN_CMD(path=solverdir)
model.solve(solver)

3. I then ran pyinstaller and dropped the unzipped binary folder (Cbc-2.7.5-win64-intel11.1 that I renamed to cbc-2.7.5-win64) into the same folder of my executable (inside the dist folder).

Works like a charm.

Basically I followed the steps of shudohmaster.

Thanks!

Em segunda-feira, 5 de dezembro de 2016 18:21:04 UTC-2, Stuart Mitchell escreveu:

you can point to a particular version of the standard solver (cbc) when you use the COIN_CMD solver

prob.solve(COIN_CMD(path = "C:/folder1/folder2/solver.xyz"))

hope this helps

Stu

On Fri, Nov 18, 2016 at 4:18 PM, Lucas Guido <guido...@gmail.com> wrote:

Dear gentlemen,

I modeled and programmed a LP with PuLP 1.6 over Python 3.5.2, working perfectly when I run the script. Nice!

Now my challenge is putting it in a EXE file, and for this I'm using PyInstaller. Here I have some trouble.
I receive the following error message when trying to run my EXE:

[...]
   File "site-packages\pulp\pulp.py", line 1643, in solve
AttributeError: 'NoneType' object has no attribute 'actualSolve'
Failed to execute script myLP

My best guess is that compiled code don't have success on finding standard solver, so I need to manually point it in my code.
Am I right? How would I do it?

For me would be very interesting, if possible, not to install a solver or deal with environment variables. Best case would be download the solver and point the file inside the code (for example C:/folder1/folder2/solver.xyz).

Note 1: Code works perfecty when runed as script, including the solver. The problem happens only when I run it as EXE.
Note 2: The problem isn't numpy or related libraries, I already checked it out.

Please, light my path.

Tks in advance!
Lucas Guido

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[Abdelmoghith El Belhadji]

Wow,you rock Stu and Lucas!
Used your instructions to get Pulp to work with Cx_Freeze and, like you said, worked like a charm !
Thank's again !

[drago...@gmail.com]

Dear Abdelmoghith,

Could you post your steps?I also got similar problem.

I modeled over Pulp 1.6.8 and python 3.5.4, and pointed to an external cbc solver following Lucas's instruction,  it works well when i ran the script. 

When I tried to build a GUI executable with PyQt5.6.0 and PyInstaller3.2.1,  an exception occurred.

Then I changed the pack library to cx_Freeze, it worked, but when the model running, there will be cbc.exe console window flash through the screen, did you got similar situation? and do you know how to hide the console window? thx.

在 2017年2月14日星期二 UTC+8上午5:11:15，Abdelmoghith El Belhadji写道：

[Abdelmoghith El Belhadji]

   Yeah, I had the same issue !

   The script ran smooth but when freezed, console windows were opened then closes everytime the solver was called... couldn't solve the issue and had to abandon.

    Good luck

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[Jason Lu]

well, thank you for your response all the same.

在 2017年10月27日星期五 UTC+8下午11:38:08，Abdelmoghith El Belhadji写道：

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[Jason Lu]

Dear Stuart,

I modeled an ILP problem over Pulp 1.6.8 and python 3.5.4, and pointed to an external cbc solver following Lucas's instruction,  it works well when i ran the script. 

But after I built it to an executable using cx_Freeze, the cbc.exe console window will appear and close in a very short time when it being called. do you know how could i get rid of the cbc.exe console window? thx in advance.

在 2016年12月6日星期二 UTC+8上午4:21:04，Stuart Mitchell写道：

you can point to a particular version of the standard solver (cbc) when you use the COIN_CMD solver

prob.solve(COIN_CMD(path = "C:/folder1/folder2/solver.xyz"))

hope this helps

Stu

On Fri, Nov 18, 2016 at 4:18 PM, Lucas Guido <guido...@gmail.com> wrote:

Dear gentlemen,

I modeled and programmed a LP with PuLP 1.6 over Python 3.5.2, working perfectly when I run the script. Nice!

Now my challenge is putting it in a EXE file, and for this I'm using PyInstaller. Here I have some trouble.
I receive the following error message when trying to run my EXE:

[...]
   File "site-packages\pulp\pulp.py", line 1643, in solve
AttributeError: 'NoneType' object has no attribute 'actualSolve'
Failed to execute script myLP

My best guess is that compiled code don't have success on finding standard solver, so I need to manually point it in my code.
Am I right? How would I do it?

For me would be very interesting, if possible, not to install a solver or deal with environment variables. Best case would be download the solver and point the file inside the code (for example C:/folder1/folder2/solver.xyz).

Note 1: Code works perfecty when runed as script, including the solver. The problem happens only when I run it as EXE.
Note 2: The problem isn't numpy or related libraries, I already checked it out.

Please, light my path.

Tks in advance!
Lucas Guido

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[Stuart Mitchell]

Hi I did have some code for this in previous versions, but removed it because it was causing problems.

Can I confirm that the window just opens and closes and the program works properly, and you want to get rid of the window?

Or is there some other problem?

Stu

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[Jason Lu]

Thx  a lot for your response.

Yes, the program works properly, I just want to get rid of the console window of cbc.exe.

Could you give me some advices? thx

 
在 2017年10月31日星期二 UTC+8上午4:19:29，Stuart Mitchell写道：

[jesper...@gmail.com]

Hi Lucas and others,

The approach works as expected, and I am able to use CBC with Pyinstaller.

However, my solution times has increased significantly from 3.6 seconds in #2, to 43.5 seconds in #1.

Running both #1 and #2 in my normal python environment gives the same results. 

Any inputs why the solve times has increased?

   # 1

   import os

   cwd = os.getcwd()

   solverdir = 'cbc-2.7.5-win64\\bin\\cbc.exe'  # extracted and renamed CBC solver binary

   solverdir = os.path.join(cwd, solverdir)

   solver = pulp.COIN_CMD(path=solverdir)

   prob.solve(solver) # Function for execution of the model

    # 2

    prob.solve(PULP_CBC_CMD())

Additionally, using #1 is producing these files in solving process. Does this influence anything?

cfdb53e024664e67ab7341493a94be2f-pulp.mps

cfdb53e024664e67ab7341493a94be2f-pulp.sol

Thank you in advance.

Jesper Holm
M.Sc.Engineering

[Stuart Mitchell]

Are you using the same version of cbc?

On Wed, 8 Aug 2018, 11:26 PM , <jesper...@gmail.com> wrote:

Dear All,

I have followed the instructions from Lucas and others, and it again works like a charm with Pyinstaller.

However, i do have a problem when accessing the solverdir and using pulp.COIN_CMD, my solve time increases enourmous.

This is the case even before I running pyinstaller on it. Running it through the .exe generated from pyinstaller returns slower solve times as well.

    # 1

    import os

    cwd = os.getcwd()

    solverdir = 'cbc-2.7.5-win64\\bin\\cbc.exe'  # extracted and renamed CBC solver binary

    solverdir = os.path.join(cwd, solverdir)

    solver = pulp.COIN_CMD(path=solverdir, threads=1, mip=1, options=['sec','500'], fracGap=0.1, msg=1)

    prob.solve(solver) # Function for execution of the model

# 1, returns an optimal solution in 43 seconds

Running it normally through python:

    # 2

    prob.solve(PULP_CBC_CMD(threads=1, mip=1, options=['sec','500'], fracGap=0.1, msg=1))

# 2, returns an optimal solution in 3 seconds.

How come things got slower? Any inputs?

Thank you in advance,

Jesper Holm

M.Sc. Engineering

torsdag den 22. december 2016 kl. 03.03.32 UTC+1 skrev Lucas Guido:

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[jesper...@gmail.com]

Hi Stuart,

How embarrassing.

I follows the instructions from Lucas and 2.7.5 version, used the solverdir from pulp instead with version 2.9.0.

Solve times are back to normal and works beautiful with pyinstaller.

Thank you.