使用matplotlib打印出精确的物理尺寸

import matplotlib.pyplot as plt
from matplotlib.transforms import Bbox

fig = plt.figure(figsize=(width, height), dpi=dpi)

ax = fig.add_subplot(111)

# 在子图上绘制你想要的图形

# 调整图形尺寸和边距
fig.tight_layout()

bbox = fig.get_tightbbox(fig.canvas.get_renderer())

width_inches = bbox.width / fig.dpi
height_inches = bbox.height / fig.dpi

import matplotlib.pyplot as plt
from matplotlib.transforms import Bbox

# 创建图形对象并设置尺寸
fig = plt.figure(figsize=(6, 4), dpi=100)

# 创建子图对象
ax = fig.add_subplot(111)

# 绘制图形
ax.plot([1, 2, 3, 4], [1, 4, 9, 16])

# 调整图形尺寸和边距
fig.tight_layout()

# 获取图形的尺寸和边距
bbox = fig.get_tightbbox(fig.canvas.get_renderer())

# 计算图形的物理尺寸
width_inches = bbox.width / fig.dpi
height_inches = bbox.height / fig.dpi

print("图形的物理尺寸：{}英寸 x {}英寸".format(width_inches, height_inches))