Automating patient communication is a crucial task in modern healthcare settings, especially when it comes to **appointment reminders**. Missed appointments can lead to gaps in care and inefficiencies for clinics. You can use **Python** to streamline this process by analyzing a `DataFrame` containing patient names and appointment dates, then identifying which appointments are scheduled within the next 7 days. For each patient with an upcoming appointment, you can print a personalized reminder message. This approach not only saves staff time but also helps ensure that patients receive timely reminders, improving attendance rates and overall patient care.

import unittest
import user_code
import ast
import re
import importlib
import csv
import sys
import io
import pandas as pd
from datetime import datetime, timedelta
from unittest import mock

class TestTask(unittest.TestCase):
    def setUp(self):
        self.fixed_today = datetime(2023, 6, 1)

    def _patch_today(self, module):
        fixed_today_local = self.fixed_today

        class FixedDateTime(datetime):
            @classmethod
            def today(cls):
                return fixed_today_local

        module.datetime = FixedDateTime

    def test_reminders_within_7_days(self):
        import user_code
        importlib.reload(user_code)
        self._patch_today(user_code)

        today = self.fixed_today.date()
        data = {
            "Patient": ["Alice", "Bob", "Charlie", "Diana", "Eve", "Frank"],
            "AppointmentDate": [
                today.strftime("%Y-%m-%d"),
                (today + timedelta(days=3)).strftime("%Y-%m-%d"),
                (today + timedelta(days=7)).strftime("%Y-%m-%d"),
                (today + timedelta(days=8)).strftime("%Y-%m-%d"),
                (today - timedelta(days=1)).strftime("%Y-%m-%d"),
                "not-a-date",
            ],
        }
        df = pd.DataFrame(data)

        f = io.StringIO()
        with mock.patch("sys.stdout", new=f):
            user_code.get_upcoming_appointments(df)

        output = normalize_text(f.getvalue())
        actual_lines = [line for line in output.split("\\n") if line.strip()]

        expected_lines = [
            f"reminder: alice, you have an appointment on {today.strftime('%Y-%m-%d')}.",
            f"reminder: bob, you have an appointment on {(today + timedelta(days=3)).strftime('%Y-%m-%d')}.",
            f"reminder: charlie, you have an appointment on {(today + timedelta(days=7)).strftime('%Y-%m-%d')}.",
        ]

        _dynamic_test(
            self,
            len(actual_lines) == 3,
            "Prints exactly 3 reminders for appointments within 7 days (inclusive)",
            f"Expected 3 reminders, got {len(actual_lines)}: {actual_lines}",
        )

        for idx, expected in enumerate(expected_lines):
            _dynamic_test(
                self,
                idx < len(actual_lines) and actual_lines[idx] == expected,
                f"Reminder line {idx+1} matches expected output",
                f"Expected '{expected}' at position {idx}, got '{actual_lines[idx] if idx < len(actual_lines) else None}'",
            )

    def test_ignores_invalid_dates(self):
        import user_code
        importlib.reload(user_code)
        self._patch_today(user_code)

        data = {
            "Patient": ["Xavier", "Yvonne"],
            "AppointmentDate": ["not-a-date", "2023-06-01"],
        }
        df = pd.DataFrame(data)

        f = io.StringIO()
        with mock.patch("sys.stdout", new=f):
            user_code.get_upcoming_appointments(df)

        output = normalize_text(f.getvalue())
        expected = "reminder: yvonne, you have an appointment on 2023-06-01."

        _dynamic_test(
            self,
            expected in output and "xavier" not in output,
            "Invalid dates are ignored; only valid reminders printed",
            f"Expected only Yvonne reminder, got: {output}",
        )

    def test_empty_dataframe(self):
        import user_code
        importlib.reload(user_code)
        self._patch_today(user_code)

        df = pd.DataFrame({"Patient": [], "AppointmentDate": []})

        f = io.StringIO()
        with mock.patch("sys.stdout", new=f):
            user_code.get_upcoming_appointments(df)

        output = normalize_text(f.getvalue())

        _dynamic_test(
            self,
            output.strip() == "",
            "No reminders printed for empty DataFrame",
            f"Expected no output, got: '{output}'",
        )

    def test_preserves_dataframe_order_after_filtering(self):
        import user_code
        importlib.reload(user_code)
        self._patch_today(user_code)

        today = self.fixed_today.date()
        data = {
            "Patient": ["A", "B", "C"],
            "AppointmentDate": [
                (today + timedelta(days=2)).strftime("%Y-%m-%d"),
                (today + timedelta(days=1)).strftime("%Y-%m-%d"),
                (today + timedelta(days=3)).strftime("%Y-%m-%d"),
            ],
        }
        df = pd.DataFrame(data)

        f = io.StringIO()
        with mock.patch("sys.stdout", new=f):
            user_code.get_upcoming_appointments(df)

        output = normalize_text(f.getvalue())
        actual_lines = [line for line in output.split("\\n") if line.strip()]

        _dynamic_test(
            self,
            len(actual_lines) == 3,
            "Prints 3 reminders for 3 valid rows within range",
            f"Expected 3 reminders, got {len(actual_lines)}: {actual_lines}",
        )

        expected_order = ["a", "b", "c"]
        for idx, name in enumerate(expected_order):
            _dynamic_test(
                self,
                idx < len(actual_lines) and actual_lines[idx].startswith(f"reminder: {name},"),
                f"Reminder order preserved for {name}",
                f"Expected reminder for '{name}' at position {idx}, got '{actual_lines[idx] if idx < len(actual_lines) else None}'",
            )

    def test_does_not_mutate_input_dataframe(self):
        import user_code
        importlib.reload(user_code)
        self._patch_today(user_code)

        today = self.fixed_today.date()
        df = pd.DataFrame(
            {
                "Patient": ["Zed"],
                "AppointmentDate": [(today + timedelta(days=1)).strftime("%Y-%m-%d")],
            }
        )

        before = df.copy(deep=True)

        f = io.StringIO()
        with mock.patch("sys.stdout", new=f):
            user_code.get_upcoming_appointments(df)

        _dynamic_test(
            self,
            df.equals(before),
            "Input DataFrame not mutated",
            f"Expected input DataFrame unchanged, but it was modified.\\nBefore:\\n{before}\\nAfter:\\n{df}",
        )

def _dynamic_test(test_case, condition, success_message, failure_message):
    if condition:
        test_case._testMethodName = success_message
        test_case.assertTrue(True, success_message)
    else:
        test_case._testMethodName = failure_message
        test_case.fail(failure_message)

def normalize_text(text):
    text = text.lower()
    text = re.sub(r"\\s{2,}", " ", text)
    text = re.sub(r"\\s*([,:?])\\s*", r"\\1 ", text)
    return text.strip()

def change_var(code: str, var_name: str, value: str) -> str:
    tree = ast.parse(code)
    lines = code.splitlines()
    changed = False

    assign_nodes = [
        (i, node)
        for i, node in enumerate(tree.body)
        if isinstance(node, ast.Assign)
        and any(isinstance(target, ast.Name) and target.id == var_name for target in node.targets)
    ]

    if not assign_nodes:
        return code

    for i, node in reversed(assign_nodes):
        start_line = node.lineno - 1
        line = lines[start_line]
        indent = " " * (len(line) - len(line.lstrip()))
        lines[start_line] = f"{indent}{var_name} = {value}"

        next_line = len(lines)
        for next_node in tree.body[i + 1 :]:
            if hasattr(next_node, "lineno"):
                next_line = next_node.lineno - 1
                break

        if next_line > start_line + 1:
            lines[start_line + 1 : next_line] = []

        changed = True

    return "\\n".join(lines) if changed else code

if __name__ == "__main__":
    unittest.main()


test_main.py

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Challenge: Appointment Reminder System

解答