二项分布PMF图

def solve():
    import numpy as np
    import matplotlib.pyplot as plt
    from scipy.stats import binom
    n, p = ____, ____
    x = np.arange(____, n+____)
    plt.bar(x, binom.pmf(____), edgecolor='____', color='____', alpha=____)
    plt.xlabel(____); plt.title(____)
    plt.tight_layout(); plt.show()
    print(____)