typo

30a7b25b · Jialei Ding · 4c2342a0 · 30a7b25b
Commit 30a7b25b authored 4 months ago by Jialei Ding
--- a/content/Week_2_4/PA/PA_2_4_A_gurobilicious.ipynb
+++ b/content/Week_2_4/PA/PA_2_4_A_gurobilicious.ipynb
@@ -44,7 +44,7 @@
    "<p>\n",
    "<b>Task 1:</b>   \n",
    "    \n",
-    "Apply for your personal license for Gurobi (one of the packages installed in `environment.yml`) and add the license file to your computer (in the default folder!). The instructions for this are on ENTER PLACE HERE.\n",
+    "Apply for your personal license for Gurobi (one of the packages installed in `environment.yml`) and add the license file to your computer (in the default folder!). The instructions for this are in the book.\n",
    "\n",
    "</p>\n",
    "</div>"

 %% Cell type:markdown id:c96d6259-08d6-4289-aea2-589d67cdb5ee tags:

 # PA 2.4A: Gurobi Environment and License

 <h1 style="position: absolute; display: flex; flex-grow: 0; flex-shrink: 0; flex-direction: row-reverse; top: 60px;right: 30px; margin: 0; border: 0">
    <style>
        .markdown {width:100%; position: relative}
        article { position: relative }
    </style>
    <img src="https://gitlab.tudelft.nl/mude/public/-/raw/main/tu-logo/TU_P1_full-color.png" style="width:100px" />
    <img src="https://gitlab.tudelft.nl/mude/public/-/raw/main/mude-logo/MUDE_Logo-small.png" style="width:100px" />
 </h1>
 <h2 style="height: 10px">
 </h2>

 *[CEGM1000 MUDE](http://mude.citg.tudelft.nl/): Week 2.4. Due: complete this PA prior to class on Friday, Dec 6, 2024.*

 %% Cell type:markdown id:7a28e541-d2d0-48a9-abf6-7b73075c8fd3 tags:

 ## Overview of Assignment

 This assignment confirms you were able to create and activate a Python environment using Anaconda from an `environment.yml` file, and that your Gurobi license has been set up properly.

 **Remember:** PA 2.4 has two notebooks that must be completed (A and B). Follow the instructions in **`README.md`** if you have not already done so.

 %% Cell type:markdown id:46929e28-a4ce-424c-b446-9f00472997dc tags:

 <div style="background-color:#AABAB2; color: black; vertical-align: middle; padding:15px; margin: 10px; border-radius: 10px; width: 95%">
 <p>
 <b>Task 1:</b>

-Apply for your personal license for Gurobi (one of the packages installed in `environment.yml`) and add the license file to your computer (in the default folder!). The instructions for this are on ENTER PLACE HERE.
+Apply for your personal license for Gurobi (one of the packages installed in `environment.yml`) and add the license file to your computer (in the default folder!). The instructions for this are in the book.

 </p>
 </div>

 %% Cell type:markdown id:ab857833 tags:

 <div style="background-color:#AABAB2; color: black; vertical-align: middle; padding:15px; margin: 10px; border-radius: 10px; width: 95%">
 <p>
 <b>Task 2:</b>

 Run the cells below. If you have correctly created the Python environment (as described in the README.md) and installed the Gurobi license, there should be no errors. If there are errors, use the Traceback to figure out what should be fixed.

 <em>You don't need to understand what the cells are doing, but we wrote a few notes to explain anyway.</em>
 </p>
 </div>

 %% Cell type:markdown id:00728bea tags:

 This cell sets up an optimization model with 3000 variables. That's a lot! We will do something like this in the optimization week. Since you need a license to process this many variables, an error will be returned if you did not install it correctly.

 %% Cell type:code id:7c5b1a71-7e0a-47d7-9037-c13d635fdff0 tags:

 ``` python
 import gurobipy
 model = gurobipy.Model()
 x = model.addVars(3000, vtype = gurobipy.GRB.CONTINUOUS, name = 'x')
 model.update()
 model.optimize()
 ```

 %% Output

    Set parameter Username
    Set parameter LicenseID to value 2588551
    Academic license - for non-commercial use only - expires 2025-11-21
    Gurobi Optimizer version 12.0.0 build v12.0.0rc1 (win64 - Windows 11.0 (22631.2))
    
    CPU model: 13th Gen Intel(R) Core(TM) i7-1365U, instruction set [SSE2|AVX|AVX2]
    Thread count: 10 physical cores, 12 logical processors, using up to 12 threads
    
    Optimize a model with 0 rows, 3000 columns and 0 nonzeros
    Model fingerprint: 0x22a73ca6
    Coefficient statistics:
      Matrix range     [0e+00, 0e+00]
      Objective range  [0e+00, 0e+00]
      Bounds range     [0e+00, 0e+00]
      RHS range        [0e+00, 0e+00]
    Presolve removed 0 rows and 3000 columns
    Presolve time: 0.01s
    Presolve: All rows and columns removed
    Iteration    Objective       Primal Inf.    Dual Inf.      Time
           0    0.0000000e+00   0.000000e+00   0.000000e+00      0s
    
    Solved in 0 iterations and 0.01 seconds (0.00 work units)
    Optimal objective  0.000000000e+00

 %% Cell type:markdown id:4d6029f7 tags:

 The cell below searches for the license file `gurobi.lic` on your computer, and will create a new file `license.lic` in the working directory of this notebook to confirm that you installed Gurobi correctly.

 %% Cell type:code id:8b221048-69bb-46ed-8a19-311ba288345a tags:

 ``` python
 import sys
 from pathlib import Path
 import os

 def find_license_in_dir(directory: Path):
    license = directory / "gurobi.lic"

    if (license.exists()):
        return license
    else:
        return None

 def find_license():
    # By default the license is installed in the home directory; this is the most likely location.
    license = find_license_in_dir(Path.home())

    if (license): return license

    # Otherwise there are other default paths Gurobi will search for each platform.
    if (sys.platform.startswith("linux")):
        license = find_license_in_dir(Path("/opt/gurobi/"))
    elif (sys.platform.startswith("win32")):
        license = find_license_in_dir(Path("C:\\gurobi\\"))
    elif (sys.platform.startswith("darwin")):
        license = find_license_in_dir(Path("/Library/gurobi/"))
    else:
        print("WARNING: Your operating system may not be supported by this function")

    if (license): return license

    # If all else fails, maybe it was put somewhere strange and the GRB_LICENSE_FILE environment variable was set
    file_path = os.environ.get("GRB_LICENSE_FILE")

    if (file_path is not None):
        file_path = Path(file_path)
        if (file_path.exists()):
            return file_path

    # Oh nO!
    raise Exception(("Could not find license. If you have an academic license and "
                    "it couldn't be found, copy the license into your repository and "
                    "remove all the info except 'TYPE' and 'VERSION'"))

 license = find_license()

 with open("license.lic", "w") as f:
    f.write(
        "".join(
            filter(
                lambda l: l.startswith("TYPE") or l.startswith("VERSION") or l.startswith("EXPIRATION"),
                license.open().readlines()
            )
        )
    )
 print("License succesfully found and processed!")
 ```

 %% Output

    License succesfully found and processed!

 %% Cell type:markdown id:133c3daf-f0b9-4f80-ae6a-32b1ceae3aeb tags:

 If you ran all of the cells above, you are ready to go: you successfully created an environment from a `*.yml` file and installed the Gurobi license! Now there is only one thing left to do.

 %% Cell type:markdown id:5ef8955f tags:

 <div style="background-color:#AABAB2; color: black; vertical-align: middle; padding:15px; margin: 10px; border-radius: 10px; width: 95%">
 <p>
 <b>Task 3:</b>

 Commit this notebook and the license file that it created to your repository.
 </p>
 </div>

 %% Cell type:markdown id:80580ab9-4d79-46b1-ae6e-775af04d43ad tags:

 **End of notebook.**
 <h2 style="height: 60px">
 </h2>
 <h3 style="position: absolute; display: flex; flex-grow: 0; flex-shrink: 0; flex-direction: row-reverse; bottom: 60px; right: 50px; margin: 0; border: 0">
    <style>
        .markdown {width:100%; position: relative}
        article { position: relative }
    </style>
    <a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/4.0/">
      <img alt="Creative Commons License" style="border-width:; width:88px; height:auto; padding-top:10px" src="https://i.creativecommons.org/l/by-nc-sa/4.0/88x31.png" />
    </a>
    <a rel="TU Delft" href="https://www.tudelft.nl/en/ceg">
      <img alt="TU Delft" style="border-width:0; width:100px; height:auto; padding-bottom:0px" src="https://gitlab.tudelft.nl/mude/public/-/raw/main/tu-logo/TU_P1_full-color.png"/>
    </a>
    <a rel="MUDE" href="http://mude.citg.tudelft.nl/">
      <img alt="MUDE" style="border-width:0; width:100px; height:auto; padding-bottom:0px" src="https://gitlab.tudelft.nl/mude/public/-/raw/main/mude-logo/MUDE_Logo-small.png"/>
    </a>

 </h3>
 <span style="font-size: 75%">
 &copy; Copyright 2023 <a rel="MUDE Team" href="https://studiegids.tudelft.nl/a101_displayCourse.do?course_id=65595">MUDE Teaching Team</a> TU Delft. This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/4.0/">Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License</a>.