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| import random | |
| import pandas as pd | |
| from tinytroupe.agent import TinyPerson | |
| class ABRandomizer(): | |
| def __init__(self, real_name_1="control", real_name_2="treatment", | |
| blind_name_a="A", blind_name_b="B", | |
| passtrough_name=[], | |
| random_seed=42): | |
| """ | |
| An utility class to randomize between two options, and de-randomize later. | |
| The choices are stored in a dictionary, with the index of the item as the key. | |
| The real names are the names of the options as they are in the data, and the blind names | |
| are the names of the options as they are presented to the user. Finally, the passtrough names | |
| are names that are not randomized, but are always returned as-is. | |
| Args: | |
| real_name_1 (str): the name of the first option | |
| real_name_2 (str): the name of the second option | |
| blind_name_a (str): the name of the first option as seen by the user | |
| blind_name_b (str): the name of the second option as seen by the user | |
| passtrough_name (list): a list of names that should not be randomized and are always | |
| returned as-is. | |
| random_seed (int): the random seed to use | |
| """ | |
| self.choices = {} | |
| self.real_name_1 = real_name_1 | |
| self.real_name_2 = real_name_2 | |
| self.blind_name_a = blind_name_a | |
| self.blind_name_b = blind_name_b | |
| self.passtrough_name = passtrough_name | |
| self.random_seed = random_seed | |
| def randomize(self, i, a, b): | |
| """ | |
| Randomly switch between a and b, and return the choices. | |
| Store whether the a and b were switched or not for item i, to be able to | |
| de-randomize later. | |
| Args: | |
| i (int): index of the item | |
| a (str): first choice | |
| b (str): second choice | |
| """ | |
| # use the seed | |
| if random.Random(self.random_seed).random() < 0.5: | |
| self.choices[i] = (0, 1) | |
| return a, b | |
| else: | |
| self.choices[i] = (1, 0) | |
| return b, a | |
| def derandomize(self, i, a, b): | |
| """ | |
| De-randomize the choices for item i, and return the choices. | |
| Args: | |
| i (int): index of the item | |
| a (str): first choice | |
| b (str): second choice | |
| """ | |
| if self.choices[i] == (0, 1): | |
| return a, b | |
| elif self.choices[i] == (1, 0): | |
| return b, a | |
| else: | |
| raise Exception(f"No randomization found for item {i}") | |
| def derandomize_name(self, i, blind_name): | |
| """ | |
| Decode the choice made by the user, and return the choice. | |
| Args: | |
| i (int): index of the item | |
| choice_name (str): the choice made by the user | |
| """ | |
| # was the choice i randomized? | |
| if self.choices[i] == (0, 1): | |
| # no, so return the choice | |
| if blind_name == self.blind_name_a: | |
| return self.real_name_1 | |
| elif blind_name == self.blind_name_b: | |
| return self.real_name_2 | |
| elif blind_name in self.passtrough_name: | |
| return blind_name | |
| else: | |
| raise Exception(f"Choice '{blind_name}' not recognized") | |
| elif self.choices[i] == (1, 0): | |
| # yes, it was randomized, so return the opposite choice | |
| if blind_name == self.blind_name_a: | |
| return self.real_name_2 | |
| elif blind_name == self.blind_name_b: | |
| return self.real_name_1 | |
| elif blind_name in self.passtrough_name: | |
| return blind_name | |
| else: | |
| raise Exception(f"Choice '{blind_name}' not recognized") | |
| else: | |
| raise Exception(f"No randomization found for item {i}") | |