line1, =plt.plot

这是一个 Python 中使用 Matplotlib 库绘制折线图的例子。`plt.plot()` 函数用于绘制折线图，它的语法为：`plt.plot([x], y, [fmt], *, data=None, **kwargs)`。其中，`x` 和 `y` 分别表示横轴和纵轴的数据，`fmt` 是一个可选参数，用于指定折线的样式，如颜色、线型等。`line1, = plt.plot(x, y, 'r--')` 这行代码将创建一个红色虚线的折线，并将其赋值给变量 `line1`。这个变量可以用于后续对这条折线的操作，比如修改样式、添加标签等。

相关问题

优化以下代码，加入图例：import matplotlib.pyplot as plt import numpy as np lines = [] line_styles = ['-', ':', '--', '-.'] line_colors = ['red', 'black', 'green', 'blue'] x = np.linspace(0, 10, 1000) # YOUR CODE HERE fig, ax = plt.subplots() for i in range(0, 4): y = np.sin(x + i * np.pi/2) lines.append(plt.plot(x, y, linestyle=line_styles[i], color=line_colors[i])) plt.show()

以下以下是以下是优以下是优化以下是优化后以下是优化后的以下是优化后的代码以下是优化后的代码，以下是优化后的代码，加以下是优化后的代码，加入以下是优化后的代码，加入了以下是优化后的代码，加入了图以下是优化后的代码，加入了图例以下是优化后的代码，加入了图例：

以下是优化后的代码，加入了图例：

import以下是优化后的代码，加入了图例：

import matplotlib以下是优化后的代码，加入了图例：

import matplotlib.pyplot以下是优化后的代码，加入了图例：

import matplotlib.pyplot as以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles =以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-',以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':',以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--',以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors =以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red',以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', '以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black',以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', '以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green',以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', '以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig,以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax =以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y =以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line,以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, =以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x,以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y,以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i],以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i],以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
lines以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
lines.append以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
lines.append(line以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
lines.append(line)

以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
lines.append(line)

ax以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
lines.append(line)

ax.legend以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
lines.append(line)

ax.legend(handles以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
lines.append(line)

ax.legend(handles=以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
lines.append(line)

ax.legend(handles=lines以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
lines.append(line)

ax.legend(handles=lines)

以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
lines.append(line)

ax.legend(handles=lines)

plt以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
lines.append(line)

ax.legend(handles=lines)

plt.show以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
lines.append(line)

ax.legend(handles=lines)

plt.show()

请将这两个程序写在一起if __name__ == '__main__': app = QApplication(sys.argv) window = MyWindow() sys.stdout = window # 将标准输出重定向到 print 输出信息框中 print("print 成功") window.show() sys.exit(app.exec_()) if __name__ == '__main__': while (1): cols = ['0', '1', '2', '3', '4', '5', '6', '7'] line_names = ['VitalSigns1', 'VitalSigns2', 'VitalSigns3', 'VitalSign4', 'VitalSign5', 'VitalSign6', 'VitalSign7', 'VitalSigns8'] nowfile = time.strftime('%Y-%m-%d-%H-%M-%S', time.localtime()) if excel_name != None and over != 0: df1 = pd.read_excel(excel_name, sheet_name='Sheet1') plt.plot(df1[cols[0]], label=line_names[0]) plt.plot(df1[cols[1]], label=line_names[1]) plt.plot(df1[cols[2]], label=line_names[2]) plt.plot(df1[cols[3]], label=line_names[3]) plt.plot(df1[cols[4]], label=line_names[4]) plt.plot(df1[cols[5]], label=line_names[5]) plt.plot(df1[cols[6]], label=line_names[6]) plt.plot(df1[cols[7]], label=line_names[7]) plt.legend() plt.xlabel('NUM DATA') plt.ylabel('LIFE DATA') plt.title('Title of the plot') plt.savefig(nowfile, dpi=300) plt.show() over = 0 main()

请注意代码缩进和格式，将两个程序整合成一个：

if __name__ == '__main__':
    app = QApplication(sys.argv)
    window = MyWindow()
    sys.stdout = window  # 将标准输出重定向到 print 输出信息框中
    print("print 成功")
    window.show()
    sys.exit(app.exec_())
    
    while (1):
        cols = ['0', '1', '2', '3', '4', '5', '6', '7']
        line_names = ['VitalSigns1', 'VitalSigns2', 'VitalSigns3', 'VitalSign4', 'VitalSign5', 'VitalSign6',
                      'VitalSign7', 'VitalSigns8']
        nowfile = time.strftime('%Y-%m-%d-%H-%M-%S', time.localtime())
        if excel_name != None and over != 0:
            df1 = pd.read_excel(excel_name, sheet_name='Sheet1')
            plt.plot(df1[cols[0]], label=line_names[0])
            plt.plot(df1[cols[1]], label=line_names[1])
            plt.plot(df1[cols[2]], label=line_names[2])
            plt.plot(df1[cols[3]], label=line_names[3])
            plt.plot(df1[cols[4]], label=line_names[4])
            plt.plot(df1[cols[5]], label=line_names[5])
            plt.plot(df1[cols[6]], label=line_names[6])
            plt.plot(df1[cols[7]], label=line_names[7])
            plt.legend()
            plt.xlabel('NUM DATA')
            plt.ylabel('LIFE DATA')
            plt.title('Title of the plot')
            plt.savefig(nowfile, dpi=300)
            plt.show()
            over = 0
        main()