[Python] Gráficos do Matplotlib estão se sobrescrevendo

Estou tentando gerar um relatório com vários gráficos gerados pelo matplotlib, porém, percebo que na sequência de gerar os gráficos eles ficam sobrescrevendo outros que já foram criados, segue exemplo:



Segue o código simples:

# Python Imports
import os
import numpy as np


def main():
if not os.path.exists('teste_graphic'):
os.makedirs('teste_graphic')

labels = ['Label 01', 'Label 02', 'Label 03', 'Label 04', 'Label 05']
values = [10, 20, 30, 40, 50]

pie(title='Pie', values=values, labels=labels)
donut(title='Donut', values=values, labels=labels, hole=.3)
bar(title='Bar H', values=values, labels=labels, orientation='h')

def bar(title, values, labels, orientation, colors=None):
import matplotlib.pyplot as plt_bar
index = np.arange(len(labels))
plt_bar.bar(index, values)
plt_bar.ylabel('Quantidade', fontsize=5)
plt_bar.xticks(index, labels, fontsize=5, rotation=30)
plt_bar.title(title)
plt_bar.savefig('teste_graphic/bar')

def pie(title, values, labels, colors=None, hole=0):
import matplotlib.pyplot as plt_pie
fig, ax = plt_pie.subplots(figsize=(6, 3), subplot_kw=dict(aspect="equal"))
data = [float(x) for x in values]
wedges, texts, autotexts = ax.pie(
data,
autopct=lambda pct: func(pct, data),
textprops=dict(color="w")
)
ax.legend(wedges, labels,
# title=title,
loc="center left",
bbox_to_anchor=(1, 0, 0.5, 1))
plt_pie.setp(autotexts, size=8, weight="bold")
ax.set_title(title)
# fig.savefig(self._path_image)
plt_pie.savefig('teste_graphic/pie')

def donut(title, values, labels, colors=None, hole=0):
import matplotlib.pyplot as plt_donut
fig, ax = plt_donut.subplots(figsize=(6, 3), subplot_kw=dict(aspect="equal"))

wedges, texts = ax.pie(values, wedgeprops=dict(width=0.5), startangle=-40)

bbox_props = dict(boxstyle="square,pad=0.3", fc="w", ec="k", lw=0.72)
kw = dict(arrowprops=dict(arrowstyle="-"),
bbox=bbox_props, zorder=0, va="center")

for i, p in enumerate(wedges):
ang = (p.theta2 - p.theta1) / 2. + p.theta1
y = np.sin(np.deg2rad(ang))
x = np.cos(np.deg2rad(ang))
horizontalalignment = {-1: "right", 1: "left"}[int(np.sign(x))]
connectionstyle = "angle,angleA=0,angleB={}".format(ang)
kw["arrowprops"].update({"connectionstyle": connectionstyle})
ax.annotate(labels, xy=(x, y), xytext=(1.35 * np.sign(x), 1.4 * y),
horizontalalignment=horizontalalignment, **kw)

ax.set_title(title)
plt_donut.savefig('teste_graphic/donut')


def func(pct, allvals):
absolute = int(pct / 100. * np.sum(allvals))
return "{:.1f}%\n({:d})".format(pct, absolute)


def autolabel(rects, ax):
"""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')


if __name__ == "__main__":
main()


Como eu consigo gerar esses gráficos de forma independente um do outro? Sem sobrescrever?

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