网络爬虫

import numpy as np

import matplotlib.pyplot as plt

x = np.array([1, 2, 3, 4])

y = np.array([1, 4, 9, 16])

plt.plot(x, y)

plt.title("RUNOOB TEST TITLE")

plt.xlabel("x - label")

plt.ylabel("y - label")

plt.show()

#散点图

import matplotlib.pyplot as plt

import numpy as np

x = np.array([1, 2, 3, 4, 5, 6, 7, 8])

y = np.array([1, 4, 9, 16, 7, 11, 23, 18])

plt.scatter(x, y)

plt.show()

#柱形图

import matplotlib.pyplot as plt
import numpy as np

x = np.array(["Runoob-1", "Runoob-2", "Runoob-3", "C-RUNOOB"])
y = np.array([12, 22, 6, 18])

plt.bar(x, y,  color = ["#4CAF50","red","hotpink","#556B2F"])
plt.show()

#饼形图

import matplotlib.pyplot as plt
import numpy as np

y = np.array([35, 25, 25, 15])

plt.pie(y,
        labels=['A','B','C','D'], # 设置饼图标签
        colors=["#d5695d", "#5d8ca8", "#65a479", "#a564c9"], # 设置饼图颜色
        explode=(0, 0.2, 0, 0), # 第二部分突出显示，值越大，距离中心越远
        autopct='%.2f%%', # 格式化输出百分比
       )
plt.title("RUNOOB Pie Test")
plt.show()