AttributeError：“串列”物件沒有屬性“get_label”

我正在嘗試使用兩個 y 軸和一個 x 軸的基本圖。為了獲得不同曲線的圖例資訊，我得到了 AttributeError。這是我的代碼：

import numpy as np
import matplotlib.pyplot as plt

x = np.linspace(0, 2.0*np.pi, 101)
y = np.sin(x)
z = np.sinh(x)

# separate the figure object and axes object from the plotting object
fig, ax1 = plt.subplots()

# Duplicate the axes with a differebt y axis and the same x axis
ax2 = ax1.twinx()  # ax2 and ax1 will have common x axis and different y axis

# plot the curves on axes 1, and 2 and get the curve hadles
curve1 = ax1.plot(x, y, label="sin", color='r')
curve2 = ax2.plot(x, z, label="sinh", color='b')

# Make a curves list to access the parameters in the curves
curves = [curve1, curve2]

# Add legend via axes1 or axex 2 object.
# ax1.legend() will not display the legend of ax2
# ax2.legend() will not display the legend of ax1

ax1.legend(curves, [curve.get_label() for curve in curves])
#ax2.legend(curves, [curve.get_label() for curve in curves]) also valid

# Global figure properties
plt.title("Plot of sine and hyperbolic sine")
plt.show()

我在下一行收到錯誤：

ax1.legend(curves, [curve.get_label() for curve in curves])

如果有人知道為什么會這樣，請告訴我。

uj5u.com熱心網友回復：

這將解決你的問題，試試這個：

import numpy as np
import matplotlib.pyplot as plt

x = np.linspace(0, 2.0*np.pi, 101)
y = np.sin(x)
z = np.sinh(x)

# separate the figure object and axes object from the plotting object
fig, ax1 = plt.subplots()

# Duplicate the axes with a differebt y axis and the same x axis
ax2 = ax1.twinx()  # ax2 and ax1 will have common x axis and different y axis

# plot the curves on axes 1, and 2 and get the curve hadles
curve1 = ax1.plot(x, y, label="sin", color='r')
curve2 = ax2.plot(x, z, label="sinh", color='b')

# Make a curves list to access the parameters in the curves
curves = curve1   curve2

# Add legend via axes1 or axex 2 object.
# ax1.legend() will not display the legend of ax2
# ax2.legend() will not display the legend of ax1
labs = [curve.get_label() for curve in curves]
ax1.legend(curves, labs, loc=0)

#ax1.legend(curves, [curve.get_label() for curve in curves])
#ax2.legend(curves, [curve.get_label() for curve in curves]) also valid

# Global figure properties
plt.title("Plot of sine and hyperbolic sine")
plt.show()

uj5u.com熱心網友回復：

因為 get_label 不支持串列資料型別，[https://www.geeksforgeeks.org/matplotlib-axes-axes-get_label-in-python/][1] 試試這個。

import numpy as np
import matplotlib.pyplot as plt

x = np.linspace(0, 2.0*np.pi, 101)
y = np.sin(x)
z = np.sinh(x)

# separate the figure object and axes object from the plotting object
fig, ax1 = plt.subplots()

# Duplicate the axes with a differebt y axis and the same x axis
ax2 = ax1.twinx()  # ax2 and ax1 will have common x axis and different y axis

# plot the curves on axes 1, and 2 and get the curve hadles
curve1, = ax1.plot(x, y, label="sin", color='r')
curve2, = ax2.plot(x, z, label="sinh", color='b')

# Make a curves list to access the parameters in the curves
curves = [curve1, curve2]

# Add legend via axes1 or axex 2 object.
# ax1.legend() will not display the legend of ax2
# ax2.legend() will not display the legend of ax1

ax1.legend(curves, curve1.get_label())
#ax2.legend(curves, curve2.get_label())
#ax2.legend(curves, [curve.get_label() for curve in curves]) also valid

# Global figure properties
plt.title("Plot of sine and hyperbolic sine")
plt.show()

uj5u.com熱心網友回復：

如果您閱讀pyplot 檔案，您可以看到 plot 函式回傳一個串列，該串列顯然沒有方法get_label()。

您想要的可能是matplotlib 的圖例檔案中描述的內容，即自動檢測您的繪圖示簽。這意味著您不必存盤您的線路結果，并且您的圖例呼叫來自

ax1.legend(curves, [curve.get_label() for curve in curves])

簡單地

ax1.legend()

在我看來，閱讀檔案不僅在大多數情況下可以解決您的問題，而且還為您提供了編程領域非常重要的能力，即能夠自己解決問題（以及閱讀檔案）。

干杯

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