如何绘制groupby生成的元组列表

from itertools import groupby
from collections import defaultdict
import matplotlib.pyplot as plt

# 示例数据
data = ['apple', 'banana', 'apricot', 'blueberry', 'cherry', 'cranberry']

# 使用 groupby 分组
# 注意：groupby 要求输入的数据是已经根据分组键排序过的
sorted_data = sorted(data, key=lambda x: x[0])
grouped_data = {k: list(v) for k, v in groupby(sorted_data, key=lambda x: x[0])}

# 绘制分组结果
group_counts = defaultdict(int)
for group in grouped_data.values():
    group_counts[len(group)] += 1

plt.bar(group_counts.keys(), group_counts.values())
plt.xlabel('Number of Items in Group')
plt.ylabel('Number of Groups')
plt.title('Group by First Character Distribution')
plt.show()

sorted_data = sorted(data, key=lambda x: x[0])  # 根据第一个字符排序

grouped_data = {k: list(v) for k, v in groupby(sorted_data, key=lambda x: x[0])}

group_counts = defaultdict(int)
for group in grouped_data.values():
    group_counts[len(group)] += 1