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统计各血型患者数量分布

未完成
初级参考 完整示例代码供参考，建议自己理解后重新输入 
def solve():
    from pyodide.http import open_url
    patients_csv = open_url("https://data.zuihe.com/dbd/hospital/state_C00/patients.csv").read()
    departments_csv = open_url("https://data.zuihe.com/dbd/hospital/state_C00/departments.csv").read()
    doctors_csv = open_url("https://data.zuihe.com/dbd/hospital/state_C00/doctors.csv").read()
    import sqlite3
    import pandas as pd
    from io import StringIO

    conn = sqlite3.connect(':memory:')
    pd.read_csv(StringIO(patients_csv)).to_sql('patients', conn, index=False, if_exists='replace')

    result = pd.read_sql_query("""
        SELECT blood_type, COUNT(*) AS patient_count
        FROM patients
        GROUP BY blood_type
        ORDER BY patient_count DESC
    """, conn)
    print(result.to_string(index=False))
    conn.close()

示例

输入
solve()
期望输出
blood_type  patient_count
         O              4
         B              4
         A              4
        AB              3
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