我想修改matplotlib bar-plot中的bar-position

import matplotlib.pyplot as plt

data = [5, 10, 8, 6, 2]
positions = [1, 2, 3, 4, 5]
width = 0.5

plt.barh(positions, data, height=width, align='center')
plt.yticks(positions, ['A', 'B', 'C', 'D', 'E'])
plt.xlabel('Value')
plt.ylabel('Category')
plt.title('Horizontal Bar Plot')
plt.show()

import matplotlib.pyplot as plt

data = [5, 10, 8, 6, 2]
positions = [1, 2, 3, 4, 5]
width = 0.5

plt.bar(positions, data, width=width, align='center')
plt.xticks(positions, ['A', 'B', 'C', 'D', 'E'])
plt.xlabel('Category')
plt.ylabel('Value')
plt.title('Vertical Bar Plot')
plt.show()