plt SyntaxError：Matplotlib 可视化中的无效语法（在 plt）

Question

Here is my code,

import numpy as np
import matplotlib.pyplot as plt
import pandas as pd

#Visualization 
from matpotlib.colors import ListedColormap
X_set, y_set = X_train, y_train
X1, X2 = np.meshgrid(np.arange(start = X_set[:, 0].min() - 1, stop = X_set[:, 0].max() + 1, step = 0.01),
                     np.arange(start = X_set[:, l].min() - 1, stop = X_set[:, l].max() + 1, step = 0.01))
plt.contourf(X1, X2, classifier.predict(np.array(([X1.ravel(), X2.ravel()]).T).reshape(X1.shape),
             alpha = 0.75, cmap = ListedColormap(( 'red', 'green'))) 
plt.xlim(X1.min(), X1.max())
plt.ylim(X2.min(), X2.max())

for i, j in enumerate(np.unique(y_set)):
     plt.scatter(X_set[y_set == j, 0], X_set[y_set == j, 1],
                 c = ListedColormap({'red', 'green'))(i), label = j)
plt.title('Logistic Regression (Training set)')
plt.xlabel('Age') 
plt.ylabel('Estimated Salary')
plt.legend()
plt.show()

You can see the "plt" alias for Matplotlib is coded as usual but the system is throwing Syntax error.Please see the error in the following,

plt.xlim(X1.min(), X1.max())
 ^
SyntaxError: invalid syntax

This is happening wherever the plt code is used.Please share some of your valuable insights.

Answer 1

The problem turned out to be very simple contrary to what I expected. I missed an "l" in "matplotlib." I coded it to be "matpotlib."