背景：我正在开发一个基于matplotlib的python商业图表包（参见：受IBCS的启发，我想为水平条形图添加一个函数。
问题：在下面的例子中，条高0.65是相对于两个类别之间的间距而言的。线宽在我看来是一个绝对值，它被添加到条的周围（并使条高一点。当你制作一个大图时，你仍然可以看到不同条之间白色。当你制作一个小图时，条高和线宽完全相同。你会看到两条线之间白色消失了，你也看不到“第一条线”，它部分地在第二条线的后面。

import matplotlib.pyplot as plt

from random import *

linewidth = 2
barheight = 0.65

# create 10 y-coordinates, with budget slightly above actual
y_budget = [y+0.1*barheight for y in range(10)]
y_actual = [y-0.1*barheight for y in range(10)]

# create 10 random width-values for the length of the horizontal bars
width_budget = [randint(1,100) for w in range(10)]
width_actual = [randint(1,100) for w in range(10)]

# Make the "big" figure and the ax to plot on
fig, ax = plt.subplots(nrows=1, ncols=1, figsize=(10, 6))
# first bar (white inside, dark grey border) will be mostly behind the second bar
ax.barh(y=y_budget, width=width_budget, color='#FFFFFF', height=barheight, linewidth=linewidth, edgecolor='#404040')
# second bar (dark grey inside, dark grey border) will be mostly behind the second bar
ax.barh(y=y_actual, width=width_actual, color='#404040', height=barheight, linewidth=linewidth, edgecolor='#404040')
# make category labels
ax.set_yticks(y_actual, ["category "+str(i+1) for i in range(10)]);

# Make the "small" figure and the ax to plot on
fig, ax = plt.subplots(nrows=1, ncols=1, figsize=(10, 2))
# first bar (white inside, dark grey border) will be mostly behind the second bar
ax.barh(y=y_budget, width=width_budget, color='#FFFFFF', height=barheight, linewidth=linewidth, edgecolor='#404040')
# second bar (dark grey inside, dark grey border) will be mostly behind the second bar
ax.barh(y=y_actual, width=width_actual, color='#404040', height=barheight, linewidth=linewidth, edgecolor='#404040')

ax.set_yticks(y_actual, ["category "+str(i+1) for i in range(10)]);

我该怎么做才能使线宽在水平条的“内部”可见？或者我该如何根据图形的大小使线宽相对于水平条？你有什么建议？
Big figure with small figure below
我已经搜索了如何使线宽相对于图形大小的信息，但没有找到。我已经搜索了是否可以找到一个参数，使线宽位于条形图的“内部”，但没有找到。