二项分布捐款响应率

def solve():
    import pandas as pd
    import numpy as np
    import matplotlib.pyplot as plt
    from scipy.stats import binom
    url = '____'
    df = pd.read_csv(____)
    p = round(df['____'].mean(), ____)
    print(____)
    print(____)
    print(____)
    x = np.arange(____, ____)
    plt.bar(x, binom.pmf(____), color='____', edgecolor='____')
    plt.xlabel(____); plt.ylabel(____); plt.title(____)
    plt.tight_layout(); plt.show()