🔒 Import mesa.time could not be resolved | Python | Page 1

dawn cedarBOT Jan 18, 2025, 4:25 PM

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@torn maple

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torn maple Jan 18, 2025, 4:28 PM

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https://paste.pythondiscord.com/WLSA

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Import "mesa.time" could not be resolved Pylance(reportMissingImports) error, tried to reinstall, clean install, change os and I still get this error

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Error when trying to run: ModuleNotFoundError: No module named 'mesa.time'

static quarry Jan 18, 2025, 4:55 PM

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see if this helps https://discord.com/channels/267624335836053506/1310372249072570429

torn maple Jan 18, 2025, 5:07 PM

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static quarry see if this helps https://discord.com/channels/267624335836053506/13103722490725...

I was unable to accomplish anything with that, couldn t understand

static quarry Jan 18, 2025, 5:08 PM

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well the important idea is that you probably have many installations of python on your machine, whether you know it or not

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and in order for the import to work, you have to install your package into the same version of python that's trying to import it.

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did you try the hack where you add the three or four lines of code to the top of your program? That pretty much always works.

torn maple Jan 18, 2025, 5:09 PM

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Will do that rn

static quarry Jan 18, 2025, 5:09 PM

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because it ensures that the two versions match, even if you aren't clear on which is which.

torn maple Jan 18, 2025, 5:10 PM

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Even after inserting those lines and it downloading stuff I still get the same output error: No module named "mesa.time"

static quarry Jan 18, 2025, 5:11 PM

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perhaps you've installed the library properly, but are confused about which modules it provides

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if it's this library, then I don't see a module named "time"

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although I do see "space" 🙂

torn maple Jan 18, 2025, 5:14 PM

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It is that one, but I am required to use .time by my requirements from a project

static quarry Jan 18, 2025, 5:15 PM

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🤷

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that, I cannot help you with

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Python 3.13.1 (v3.13.1:06714517797, Dec  3 2024, 14:00:22) [Clang 15.0.0 (clang-1500.3.9.4)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
2025-01-18T17:14:55+0000 INFO  .pythonrc <module> Hello from /private/var/folders/b0/_p0c_57s5n90cy4njdgd8vhw0000gq/T/x/.venv/bin/python and /Users/not-workme/.pythonrc
2025-01-18T17:14:55+0000 INFO  .pythonrc <module> cwd is /private/var/folders/b0/_p0c_57s5n90cy4njdgd8vhw0000gq/T/x
>>> import mesa
>>> import mesa.time
Traceback (most recent call last):
  File "<python-input-1>", line 1, in <module>
    import mesa.time
ModuleNotFoundError: No module named 'mesa.time'
>>>
``` is what I see

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you'll have to ask whoever created those requirements

torn maple Jan 18, 2025, 5:17 PM

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I have even tried replacing mesa.time with other things and rewrite the code but I got errors at launch that I was unable to resolve or understand

static quarry Jan 18, 2025, 5:18 PM

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🤷

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there's no way I can possibly help

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I've never heard of this library until just now, it clearly doesn't provide a module named "time", so ... 🤷

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(I even tried doing pip install "mesa[all]", which installs more stuff; but that didn't provide mesa.time either)

torn maple Jan 18, 2025, 5:19 PM

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Yea, makes sense. Is there anyway I could share you with the other code that I have and send you the errors? Maybe you can get the hang of anything inside there

static quarry Jan 18, 2025, 5:19 PM

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I don't see the point honestly

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I literally cannot imagine how this could work. I am reasonably sure your prof or TA or whoever gave you this assignment is confused.

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They left out a step, or something.

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Maybe your uni has their own package repository, which you're expected to use instead of pypy, and their version of "mesa" does provide mesa.time.

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but that's slightly crazy.

torn maple Jan 18, 2025, 5:20 PM

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The other one doesn t use .time, I only get some errors that I don t understand. I might just not use that and get around it

torn maple Jan 18, 2025, 5:21 PM

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static quarry but that's slightly crazy.

Indeed

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This is the new code(without mesa.time) and the errors:

File "e:\faculta\Proiect Python\main.py", line 116, in <module>
model = EvacuationModel(num_agents=5000, width=50, height=50, exits=exits)
File "e:\faculta\Proiect Python\main.py", line 77, in init
agent = EvacuationAgent(i, self, speed, panic_threshold, is_injured)
File "e:\faculta\Proiect Python\main.py", line 13, in init
Agent.init(self, unique_id, model)
~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\Merien\AppData\Local\Programs\Python\Python313\Lib\site-packages\mesa\agent.py", line 64, in init _
super().init(*args, **kwargs)
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
TypeError: object.init() takes exactly one argument (the instance to initialize)

https://paste.pythondiscord.com/YFKQ

north gale Jan 18, 2025, 5:32 PM

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you don't call __init__() explicitly

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or at least you should do super().__init__(unique_id, model) then

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(my previous comment was due to a misreading of the stack trace)

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just make sure that the superclass initializer takes the arguments you expect it to

torn maple Jan 18, 2025, 5:51 PM

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After editing the code I still get the same errors. In this code that is almost doing the same thing I get the same errors that I can t get over and have been stuck on for hours now: https://paste.pythondiscord.com/DEEQ

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I just can t get around it with anything I search

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I have got over those erros and only get these now: File "e:\faculta\Proiect Python\main.py", line 76, in <module>
model = OpinionModel(num_agents, influencer_fraction)
File "e:\faculta\Proiect Python\main.py", line 47, in init
self.grid.place_agent(agent, i)
~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^
File "C:\Users\Merien\AppData\Local\Programs\Python\Python313\Lib\site-packages\mesa\space.py", line 87, in wrapper if agent.pos is not None:
^^^^^^^^^
AttributeError: 'OpinionAgent' object has no attribute 'pos'

https://paste.pythondiscord.com/2JTA

north gale Jan 18, 2025, 6:03 PM

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is that class supposed to inherit from a mesa class?

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or why does mesa code think the instance should have a property named pos?

torn maple Jan 18, 2025, 6:05 PM

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I am not even sure anymore, I m not the best at phyton and I m trying to fix this code

latent osprey Jan 18, 2025, 6:33 PM

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this might be relevant: https://github.com/projectmesa/mesa/pull/2476

GitHub

Remove deprecated time module by EwoutH · Pull Request #2476 · proj...

The time module was already deprecated, this PR removes it. See:

Deprecate Time module and all its Schedulers #2306
The Future of Schedulers in Mesa #2231

Targeted at Mesa 3.1.

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you would have to do pip install "mesa<3.1" to get a version that still has mesa.time, but it was already deprecated at that time, just not removed yet

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@torn maple 👆

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but you should probably not use it anymore as the project writes that it has been deprecated for a while and now has even been entirely removed from the project

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so i would say it's a bad requirement from whom ever gave you this assignment

torn maple Jan 18, 2025, 6:41 PM

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I have not used it anymore, I tried to switch the code up and ended up with something new that I can t get my head around due to errors. The code has no problems anymore but I have errors.I can share the new code here

latent osprey Jan 18, 2025, 6:41 PM

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they should update their curriculum

torn maple Jan 18, 2025, 6:43 PM

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import random
import numpy as np
import networkx as nx
import matplotlib.pyplot as plt
from mesa.space import NetworkGrid
from mesa.datacollection import DataCollector

class OpinionAgent:
    def __init__(self, unique_id, model, influence, opinion):
        self.unique_id = unique_id
        self.model = model
        self.influence = influence  # Influence weight (0 to 1)
        self.opinion = opinion  # Current opinion (-1 to 1)
        self.next_opinion = opinion  # Placeholder for the next opinion
        self.pos = None  # Position attribute required for compatibility with NetworkGrid

    def step(self):
        neighbors = self.model.grid.get_neighbors(self.pos, include_center=False)
        neighbor_opinions = [self.model.agent_dict[neighbor].opinion for neighbor in neighbors]

        if neighbor_opinions:
            peer_influence = np.mean(neighbor_opinions)
            self.next_opinion = (1 - self.influence) * self.opinion + self.influence * peer_influence
        else:
            self.next_opinion = self.opinion

        # Add randomness (independent opinion change)
        if random.random() < 0.05:  # 5% chance of random opinion adjustment
            self.next_opinion += random.uniform(-0.1, 0.1)
            self.next_opinion = np.clip(self.next_opinion, -1, 1)

    def advance(self):
        self.opinion = self.next_opinion

class OpinionModel:
    def __init__(self, num_agents, influencer_fraction):
        self.num_agents = num_agents
        self.influencer_fraction = influencer_fraction
        self.grid = NetworkGrid(nx.scale_free_graph(num_agents))  # Scale-free network
        self.agent_dict = {}  # Use a custom attribute for agent storage

        for i in range(num_agents):
            is_influencer = random.random() < influencer_fraction
            influence = 0.9 if is_influencer else random.uniform(0.1, 0.5)
            opinion = random.uniform(-1, 1)
            agent = OpinionAgent(i, self, influence, opinion)
            agent.pos = i  # Set the position of the agent
            self.agent_dict[i] = agent
            self.grid.place_agent(agent, i)

        self.datacollector = DataCollector(
            model_reporters={"Average Opinion": self.compute_average_opinion},
            agent_reporters={"Opinion": "opinion"}
        )

    @staticmethod
    def compute_average_opinion(model):
        opinions = [agent.opinion for agent in model.agent_dict.values()]
        return np.mean(opinions)

    def step(self):
        # Update each agent's step logic
        for agent in self.agent_dict.values():
            agent.step()
        
        # Advance all agents to the next state
        for agent in self.agent_dict.values():
            agent.advance()

        # Collect data at the end of the step
        self.datacollector.collect(self)

# Run the model
num_agents = 5000
influencer_fraction = 0.05  # 5% influencers
steps = 1000

model = OpinionModel(num_agents, influencer_fraction)

for _ in range(steps):
    model.step()

# Collect results
data = model.datacollector.get_model_vars_dataframe()
agent_data = model.datacollector.get_agent_vars_dataframe()

# Visualization
plt.figure(figsize=(10, 6))
plt.plot(data.index, data["Average Opinion"], label="Average Opinion")
plt.title("Average Opinion Over Time")
plt.xlabel("Time Steps")
plt.ylabel("Average Opinion")
plt.legend()
plt.show()

# Histogram of final opinions
final_opinions = agent_data.xs(steps - 1, level="Step")["Opinion"]
plt.figure(figsize=(10, 6))
plt.hist(final_opinions, bins=20, edgecolor="black")
plt.title("Distribution of Final Opinions")
plt.xlabel("Opinion")
plt.ylabel("Frequency")
plt.show()

latent osprey Jan 18, 2025, 6:46 PM

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torn maple ```py import random import numpy as np import networkx as nx import matplotlib.p...

i would say this is a new problem and that you might get more help with it if you close this topic and open a new one with a new name and problem description that fits the new problem better

torn maple Jan 18, 2025, 6:46 PM

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latent osprey i would say this is a new problem and that you might get more help with it if yo...

Alright, thank you so much!

dawn cedarBOT Jan 18, 2025, 6:46 PM

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#🔒 Import mesa.time could not be resolved