Creating 4-3 Stacks in MLB with Fanduel

[lightninglarry]

Can anyone chime in on what im doing incorrectly?
Heres the error:
SolverInfeasibleSolutionException Traceback (most recent call last)
~\anaconda3\lib\site-packages\pydfs_lineup_optimizer\lineup_optimizer.py in optimize(self, n, max_exposure, randomness, with_injured, exposure_strategy)
383 try:
--> 384 solved_variables = solver.solve()
385 lineup_players = []

~\anaconda3\lib\site-packages\pydfs_lineup_optimizer\solvers\pulp_solver.py in solve(self)
55 invalid_constraints = [name for name, constraint in self.prob.constraints.items() if not constraint.valid()]
---> 56 raise SolverInfeasibleSolutionException(invalid_constraints)

SolverInfeasibleSolutionException: ['_C393', '_C507', '_C511', 'min_teams', 'total_players', 'budget']

During handling of the above exception, another exception occurred:

GenerateLineupException Traceback (most recent call last)
in
32 lineups = optimizer.optimize(n=10, max_exposure=.4)
33 optimizer.set_min_salary_cap(34700)
---> 34 for lineup in lineups:
35 print(lineup)
36 optimizer.export(r"C:\Users\brand\Desktop\MLB\FD.csv")

~\anaconda3\lib\site-packages\pydfs_lineup_optimizer\lineup_optimizer.py in optimize(self, n, max_exposure, randomness, with_injured, exposure_strategy)
399 constraint.post_optimize(variables_names)
400 except SolverInfeasibleSolutionException as solver_exception:
--> 401 raise GenerateLineupException(solver_exception.get_user_defined_constraints())
402 self.last_context = context
403

GenerateLineupException: Can't generate lineups. Following constraints are not valid: min_teams,total_players,budget

heres the code creating it:
from pydfs_lineup_optimizer import get_optimizer, Site, Sport, CSVLineupExporter
from pydfs_lineup_optimizer.stacks import TeamStack, PositionsStack, PlayersGroup
from pydfs_lineup_optimizer import AfterEachExposureStrategy

optimizer = get_optimizer(Site.FANDUEL, Sport.BASEBALL)

optimizer.load_players_from_csv(r"C:\Users\brand\Downloads\FanDuel-MLB-2021 ET-04 ET-01 ET-56054-players-list.csv")

optimizer.restrict_positions_for_opposing_team(['P'], ['C', 'SS', 'OF', '1B', '2B', '3B'])
optimizer.add_stack(TeamStack(4, for_teams=['DET', 'PHI', 'NYY', 'CHC'])) # stack 4 players from any of specified teams
optimizer.add_stack(TeamStack(3, spacing=2)) # stack 3 players close to each other in range of 2 spots.**

devers_jd_xander = PlayersGroup([optimizer.get_player_by_name(Nickname) for Nickname in ('Rafael Devers', 'J.D. Martinez', 'Xander Boegarts')], max_exposure=0.5)
optimizer.add_players_group(devers_jd_xander)

bieber = optimizer.get_player_by_name("Shane Bieber")
optimizer.add_player_to_lineup(bieber)
bieber.max_exposure = .5
#cole = optimizer.get_player_by_name("Gerrit Cole")
#optimizer.add_player_to_lineup(cole)
#cole.max_exposure = .1
#darvish = optimizer.get_player_by_name("Yu Darvish")
#optimizer.add_player_to_lineup(darvish)
#darvish.max_exposure = .2
#giolito = optimizer.get_player_by_name("Lucas Giolito")
#optimizer.add_player_to_lineup(giolito)
#giolito.max_exposure = .1
#scherzer = optimizer.get_player_by_name("Max Scherzer")
#optimizer.add_player_to_lineup(scherzer)
#scherzer.max_exposure = .1

lineups = optimizer.optimize(n=10, max_exposure=.4)
optimizer.set_min_salary_cap(34700)
for lineup in lineups:
print(lineup)
optimizer.export(r"C:\Users\brand\Desktop\MLB\FD.csv")
import pandas as pd
df= pd.read_csv(r"C:\Users\brand\Desktop\MLB\FD.csv")

Changing my stack to a 3-3 works, or a 4-2 works, but not 4-3, which still meets the roster requirement of 4 different teams if my Pitcher is a diff player. Wanting 4 man, 3 man, 1 off, and my P type lineups.

also a secondary Q. I had to comment my pitchers out as it didnt like have all the exposures like that. Is there a way to do that?

[bigboyz]

I'm having the same issues as you. I have seen that setting multiple max or min exposure to over 5-6 players that compete for the same position usually gives a Unable To Solve error. I run into this setting lineups and doing the same wheel of exposures over defense often where I really don't have a favorite. I tried TotalExposureStrategy, AfterExposureStrategy. I went through the code line by line trying to see where setting too many min or max might toss the error. I just can't figure it out. Just seems to be no way to do more or five min or max for any single player. I find min.exposure to be more picky than max where I often can get only 3-4 and never try to total them up to 100% as you did above. I get the best luck when I have 20% or so leftover.

As far as the stacks, I also had the exact error today on FanDuel stacking. Seems like anything that effects 7 players is a fail. It's solvable and I can come up with my own lineups that meet all requirements, but getting the error as you.

Such as huge part of baseball so I haven't given up searching for a fix. Hoping its all related to some constraint that we can modify. I'll continue to update if I find anything, but if anyone else out there can pinpoint what causes this to fail, it would be greatly appreciated!

[bigboyz]

Hey, @lightninglarry! We just got an update that fixed a position bug with FanDuel. Since that update my 4-3 stacks and any other stacks I attempt work fine. I am certain that position bug is what affected the stack bug for FanDuel baseball. I think you should update PYDFS and try again and I bet you you'll see it work.

[lightninglarry]

will try today my man. Thanks @bigboyz

[Owen-Slater]

I also can confirm that the update fixed these errors.

[lightninglarry]

Thanks guys. Still having issues setting exposure to more than 1 Pitcher on a slate,
LineupOptimizerException: You're already select all P's

what are your thoughts on this?

[bigboyz]

Personally, what I do is use the min and max exposure ability on the CSV file. Then just put .30 Cole or whatever. Sounds like the error is FanDuel and you locked a pitcher, but than tried to add another even though 1 is limit.

[lightninglarry]

@bigboyz how do i message you on here. Id like to learn more if you got time?
feel free to email me [email protected].

[lightninglarry]

LineupOptimizerException: Unable to build lineup. was working for a tad.

[Owen-Slater]

@lightninglarry Hi ,so I partially retract my statement regarding the original issue. It is fixed with the update, but it looks like when you create no Pitcher vs Batters optimizer.restrict_positions_for_opposing_team(['P'], ['C', 'SS', 'OF', '1B', '2B', '3B']) there may sometimes be an issue. I'm not 100% sure though. Try removing this constraint if you have it and let me know if it works.

[EdCarGoes]

LineupOptimizerException: Unable to build lineup. was working for a tad.

Can also confirm the issue seemed to be fixed for a day or two. Then I think a second update was made and the issue seems to be back. I have a very large pool of players and right now only 23 lineups are being generated before it throws the "unable to build lineup" error.

[lightninglarry]

still issue comes up. I was able to create 7 lineups before unable to build lineup occurred.

[DimaKudosh]

How do you run optimizer? What stacks do you use? I tried to generate 150 lineups with 4-3 team stacks for today's contest and it didn't throw me error

[lightninglarry]

@DimaKudosh, ive tried just to leave it empty and let projections dictate my stacks.
Tried tonight and it spit out 11 until it faulted out.

from pydfs_lineup_optimizer import get_optimizer, Site, Sport, CSVLineupExporter
from pydfs_lineup_optimizer.stacks import TeamStack, PositionsStack, PlayersGroup
from pydfs_lineup_optimizer import AfterEachExposureStrategy

optimizer = get_optimizer(Site.FANDUEL, Sport.BASEBALL)

optimizer.load_players_from_csv(r"C:\Users\brand\Downloads\FanDuel-MLB-2021 ET-04 ET-19 ET-57413-players-list.csv")

optimizer.restrict_positions_for_opposing_team(['P'], ['C', 'SS', 'OF', '1B', '2B', '3B'])
optimizer.add_stack(TeamStack(4, spacing=1, max_exposure=0.3))
optimizer.add_stack(TeamStack(3, spacing=1, max_exposure=0.3))

lineups = optimizer.optimize(n=150, max_exposure=.5, exposure_strategy = AfterEachExposureStrategy)
optimizer.set_min_salary_cap(34200)
optimizer.set_max_repeating_players(7)
for lineup in lineups:
print(lineup)

[bigboyz]

I noticed you are using spacing=1. I have 57413 as I played that slate today, but can you post the exact file you used? I want to compare it to mine. I noticed when I download a file early the Batting Order is omitted from many teams. If your copy did not have it for all teams it may very well be unsolvable with those constraints.

[lightninglarry]

no, on that i waited till after lock to use the file just to test it out. All lineups were in.

[Owen-Slater]

@lightninglarry @bigboyz is it possible that the dual positions on FD are creating this issue? I haven't investigated it in the script yet, but I noticed I do miss some stacks that should be generated.
So for instance if you have a 4 stack, spacing =1 for ['C', '2B', 'OF', '1B', '3B', 'SS'] ..... and the only way you can achieve a spacing of 1 is by using a player designated as 3B/1B or 2B/SS ... then this will throw an error (?) or stop the optimization? ... Not sure here, just throwing out a suggestion.
I know that this issue was fixed in an update, but maybe the spacing needs to be addressed. Again, I haven't gone through the script yet to verify this.

[lightninglarry]

@lightninglarry @bigboyz is it possible that the dual positions on FD are creating this issue? I haven't investigated it in the script yet, but I noticed I do miss some stacks that should be generated.
So for instance if you have a 4 stack, spacing =1 for ['C', '2B', 'OF', '1B', '3B', 'SS'] ..... and the only way you can achieve a spacing of 1 is by using a player designated as 3B/1B or 2B/SS ... then this will throw an error (?) or stop the optimization? ... Not sure here, just throwing out a suggestion.
I know that this issue was fixed in an update, but maybe the spacing needs to be addressed. Again, I haven't gone through the script yet to verify this.

So if i leave spacing out, your thinking it works @Owen-Slater ? If so thats cool, but still spacing would need to be addressed I think.

[lightninglarry]

I took the spacing code part out, only created 1 lineup before it crashed tonight using the above code

[lightninglarry]

I think ive got it working, thanks for all the help.
One more question though. Wanting to add randomness say by like 10 pct, or 25 pct to my projections.
1- is this syntax correct, and 2- how do u incorporate randomness as a percentage?

optimizer.add_stack(TeamStack(4, for_teams=['DET', 'PHI', 'NYY', 'CHC'] spacing=1, max_exposure=0.3)) # stack 4 players from any of specified teams
optimizer.add_stack(TeamStack(4, for_teams=[‘ARI', 'STL', 'NYM', 'BOS'] spacing=1, max_exposure=0.6)) # stack 4 players from any of specified teams
optimizer.add_stack(TeamStack(4, for_teams=['ATL', 'SF', 'LAD', 'BAL'] spacing=1, max_exposure=0.8)) # stack 4 players from any of specified teams

Also for anyone who uses Fanduel, if the team lineup hasnt been out yet, and you want them in your stack, do you put a # for batting order for player? or if u leave it blank does it still spit it out at you anyways if there is a projection? @bigboyz