Update with 2024 material

notebooks/walker/Step_6_loading_parameters_from_file/run.py

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+import json
+import time
+
+import git
+import numpy as np
+
+import context_maps
+from walker import Walker
+
+# Use the following parameters to simulate and save a trajectory of the walker
+
+seed = 42
+sigma_i = 3
+sigma_j = 4
+size = 200
+i, j = (50, 100)
+n_iterations = 1000
+# USE map_type hills
+random_state = np.random.RandomState(seed)
+
+# STEP 1: Create a context map
+context_map = context_maps.hills_context_map_builder(size)
+
+# STEP 2: Create a Walker
+walker = Walker(sigma_i, sigma_j, context_map)
+
+# STEP 3: Simulate the walk
+
+trajectory = []
+for _ in range(n_iterations):
+    i, j = walker.sample_next_step(i, j, random_state)
+    trajectory.append((i, j))
+
+# STEP 4: Save the trajectory
+curr_time = time.strftime("%Y%m%d-%H%M%S")
+np.save(f"sim_{curr_time}", trajectory)
+
+
+# STEP 5: Save the metadata
+# lookup git repository
+repo = git.Repo(search_parent_directories=True)
+sha = repo.head.object.hexsha
+
+with open('meta.txt', 'w') as f:
+    f.write(f'I estimated parameters at {curr_time}.\n')
+    f.write(f'The git repo was at commit {sha}')