我的代碼：import numpy as npimport matplotlib.pyplot as plt#sample dataME_Requests = {'John Doe': 47, 'Amanda Doe': 27, 'Maria Doe': 26}non_ME_Requests = {'John Doe': 105, 'Amanda Doe': 64, 'Maria Doe': 48}month="Apr-2020"X = np.arange(len(ME_Requests))ax = plt.subplot(111)ax.bar(X, ME_Requests.values(), width=0.2, align='center')ax.bar(X-0.2, non_ME_Requests.values(), width=0.2, align='center')ax.legend(('ME_Requests','non_ME_Requests'))plt.xticks(X, ME_Requests.keys())plt.title("Emails Closed per team member in {}".format(month) , fontsize=17)plt.savefig('img.png')plt.show()我目前的條形圖：期望的輸出：我正在嘗試以下操作：#sample dataME_Requests = {'John Doe': 47, 'Amanda Doe': 27, 'Maria Doe': 26}non_ME_Requests = {'John Doe': 105, 'Amanda Doe': 64, 'Maria Doe': 48}month="Apr-2020"x = np.arange(len(month))  # the label locationswidth = 0.35  # the width of the barsfig, ax = plt.subplots()rects1 = ax.bar(X, ME_Requests.values(), width=0.2, align='center')rects2 = ax.bar(X-0.2, non_ME_Requests.values(), width=0.2, align='center')# Add some text for labels, title and custom x-axis tick labels, etc.ax.set_ylabel('# Requests')ax.set_title("Emails Closed per team member in {}".format(month) , fontsize=17)ax.set_xticks(X, ME_Requests.keys())ax.set_xticklabels(month)ax.legend(('ME_Requests','non_ME_Requests'))def autolabel(rects):    """Attach a text label above each bar in *rects*, displaying its height."""    for rect in rects:        height = rect.get_height()        ax.annotate('{}'.format(height),                    xy=(rect.get_x() + rect.get_width() / 2, height),                    xytext=(0, 3),  # 3 points vertical offset                    textcoords="offset points",                    ha='center', va='bottom')autolabel(rects1)autolabel(rects2)fig.tight_layout()plt.show()但是存在一個(gè)問題，因?yàn)樗粫?huì)顯示用戶名（John Doe 等），而是顯示“p”或“r”等。請(qǐng)參見下文：有人可以幫我解決這個(gè)問題嗎？提前致謝！