利润表分析：上下半年毛利率差异显著性检验

"____""____""____"

metadata = {
    "____": "____",
    "____": "____",
    "____": "____",
    "____": "____",
    "____": ["____"],
    "____": ["____", "____", "____"],
    "____": ____
}

# 题目描述
"____""____""____"

def solve():
    import pandas as pd
    from pyodide.http import open_url
    from io import StringIO

    BASE_URL = "____"
    df = pd.read_csv(StringIO(open_url(____).read()))

    fy17 = df[df['____'] == '____'].iloc[____]
    h1 = df[df['____'] == '____'].iloc[____]
    fy18 = df[df['____'] == '____'].iloc[____]

    h2_rev = fy18['____'] - h1['____']
    h2_cost = fy18['____'] - h1['____']

    gm_17 = round((____) / fy17['____'], ____)
    gm_h1 = round((____) / h1['____'], ____)
    gm_h2 = round((____) / h2_rev, ____)

    diff_h2h1 = round((____) * ____, ____)
    diff_h2fy = round((____) * ____, ____)

    abs_diff = abs(____)
    if abs_diff > ____:
        rating = '____'
    elif abs_diff > ____:
        rating = '____'
    else:
        rating = '____'

    lines = [
        f"____",
        f"____",
        f"____",
        f"____",
        f"____",
        f"____",
    ]
    return '____'.join(____)

if __name__ == "____":
    print(solve())