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Add to_json and load_json methods #7

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Add to_json and load_json methods #7

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21 changes: 21 additions & 0 deletions notebooks/walker/Step 3 serialize/walker.py
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
import numpy as np
import matplotlib.pyplot as plt
import json


class Walker:
Expand Down Expand Up @@ -86,6 +87,26 @@ def _compute_next_step_probability(self, next_step_map):
next_step_probability /= next_step_probability.sum()
return next_step_probability

def to_json(self, filename):
stem = filename.split(sep='.')[0]
context_map_filename = f'{stem}_context_map.npy'
with open(filename, 'w') as f:
json.dump({'sigma_i': self.sigma_i,
'sigma_j': self.sigma_j,
'size': self.size,
'context_map_path': context_map_filename}, f)
np.save(context_map_filename, self.context_map)
return filename

@classmethod
def from_json(cls, filename):
with open(filename, 'r') as f:
walker_dict = json.load(f)
print(walker_dict)
with open(walker_dict['context_map_path'], 'rb') as f:
context_map = np.load(walker_dict['context_map_path'])
return cls(walker_dict['sigma_i'], walker_dict['sigma_j'], walker_dict['size'], context_map)


def plot_trajectory(trajectory, context_map):
""" Plot a trajectory over a context map. """
Expand Down