使用 matplotlib 绘制条形码

import numpy as np
import matplotlib.pyplot as plt

code = np.array([
    1, 0, 1, 0, 1, 1, 1, 0, 1, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 1, 1,
    0, 0, 0, 1, 0, 1, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0,
    1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1,
    1, 0, 0, 1, 1, 0, 1, 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1])

pixel_per_bar = 4 # 线宽像素
dpi = 100 # 分辨率，默认值也是100

fig = plt.figure(figsize=(len(code)*pixel_per_bar/dpi, 2), dpi=dpi)
ax = fig.add_axes([0, 0, 1, 1]) # 设置坐标轴的范围为整个图窗
ax.set_axis_off() # 隐藏 ax 的坐标轴
ax.imshow(code.reshape(1,-1), # 必须将(N,1)转化为(N,1), 否则会报错
        cmap='binary', # 设置为二值图
        aspect='auto') # aspect 设置坐标轴的长宽比
        
plt.show()