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doctor.py
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doctor.py
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"""
File: doctor.py
Project 5
Conducts an interactive session of nondirective psychotherapy.
Adds a history list of earlier patient sentences, which can
be chosen for replies to shift the conversation to an earlier topic.
"""
import random
history = []
# All doctors share the same qualifiers, replacements, and hedges.
QUALIFIERS = ['Why do you say that ', 'You seem to think that ',
'Did I just hear you say that ',
'Why do you believe that ']
REPLACEMENTS = {'i': 'you', 'me': 'you', 'my': 'your',
'we': 'you', 'us': 'you', 'am': 'are',
'you': 'i', 'you': 'I'}
HEDGES = ['Go on.', 'I would like to hear more about that.',
'And what do you think about this?', 'Please continue.']
def reply(sentence):
"""Implements three different reply strategies."""
probability = random.randint(1, 5)
if probability in (1, 2):
# Just hedge
answer = random.choice(hedges)
elif probability == 3 and len(history) > 3:
# Go back to an earlier topic
answer = "Earlier you said that " + \
changePerson(random.choice(history))
else:
# Transform the current input
answer = random.choice(qualifiers) + changePerson(sentence)
# Always add the current sentence to the history list
history.append(sentence)
return answer
def changePerson(sentence):
"""Replaces first person pronouns with second person
pronouns."""
words = sentence.split()
replyWords = []
for word in words:
replyWords.append(replacements.get(word, word))
return " ".join(replyWords)
def main():
"""Handles the interaction between patient and doctor."""
print("Good morning, I hope you are well today.")
print("What can I do for you?")
while True:
sentence = input("\n>> ")
if sentence.upper() == "QUIT":
print("Have a nice day!")
break
print(reply(sentence))
# The entry point for program execution
if __name__ == "__main__":
main()