From 90fe84d52a4a59b951f231cb1e164f8eafbd20da Mon Sep 17 00:00:00 2001
From: Brady James Garvin <bgarvin@cse.unl.edu>
Date: Wed, 13 Feb 2019 10:01:31 -0600
Subject: [PATCH] Added more examples of method overriding, polymorphism, and
duck typing.
---
cohorts.py | 50 +++++++++++++++++++++++++++++++++++++++++++++++
notes.py | 29 +++++++++++++++++++++++++++
person_patient.py | 9 ++++++---
3 files changed, 85 insertions(+), 3 deletions(-)
create mode 100644 cohorts.py
create mode 100644 notes.py
diff --git a/cohorts.py b/cohorts.py
new file mode 100644
index 0000000..fc20f7c
--- /dev/null
+++ b/cohorts.py
@@ -0,0 +1,50 @@
+class Patient(object):
+ def __init__(self, name, region, age):
+ self.name = name
+ self.region = region
+ self.age = age
+
+ def __repr__(self):
+ return f'Person({repr(self.name)}, {repr(self.region)}, {repr(self.age)})'
+
+
+class Cohort(object):
+ def includes(self, patient):
+ raise NotImplementedError('The Cohort class\'s includes method must be overridden to be called.')
+
+ def filter(self, patients):
+ result = []
+ for patient in patients:
+ if self.includes(patient):
+ result.append(patient)
+ return result
+
+
+class RegionalCohort(Cohort):
+ def __init__(self, region):
+ self.region = region
+
+ def includes(self, patient):
+ return patient.region == self.region
+
+
+class AgeCohort(Cohort):
+ def __init__(self, minimum, maximum):
+ self.minimum = minimum
+ self.maximum = maximum
+
+ def includes(self, patient):
+ return self.minimum <= patient.age <= self.maximum
+
+
+if __name__ == '__main__':
+ ada = Patient('Ada', 'UK', 203)
+ charles = Patient('Charles', 'UK', 227)
+ grace = Patient('Grace', 'US', 112)
+ patients = [ada, charles, grace]
+ uk_cohort: Cohort = RegionalCohort('UK')
+ young_cohort: Cohort = AgeCohort(0, 225)
+ print(f'Charles is in the UK region: {uk_cohort.includes(charles)}')
+ print(f'Charles is in the "young" age group: {young_cohort.includes(charles)}')
+ print(f'Everyone in the UK region: {uk_cohort.filter(patients)}')
+ print(f'Everyone in the "young" age group: {young_cohort.filter(patients)}')
diff --git a/notes.py b/notes.py
new file mode 100644
index 0000000..a4b123e
--- /dev/null
+++ b/notes.py
@@ -0,0 +1,29 @@
+class Visit(object):
+ def __init__(self):
+ self.notes = []
+
+ def add_note(self, note):
+ self.notes.append(note)
+
+
+class Appointment(object):
+ def __init__(self):
+ self.note = None
+
+ def add_note(self, note):
+ self.note = note
+
+
+def void(event):
+ event.add_note('Voided.')
+
+
+if __name__ == '__main__':
+ visit = Visit()
+ appointment = Appointment()
+ number = 7
+ void(visit)
+ print(visit.notes)
+ void(appointment)
+ print(appointment.note)
+ void(number)
diff --git a/person_patient.py b/person_patient.py
index 783f288..a909d3a 100644
--- a/person_patient.py
+++ b/person_patient.py
@@ -9,6 +9,9 @@ class Patient(Person):
if __name__ == '__main__':
- print(object())
- print(Person())
- print(Patient())
+ example_object: object = object()
+ example_person: object = Person()
+ example_patient: object = Patient()
+ print(example_object)
+ print(example_person)
+ print(example_patient)
--
GitLab