diff --git a/pypots/utils/visual/visualizeAttention.py b/pypots/utils/visual/visualizeAttention.py
index 3c6b6899..7eaf6dd4 100644
--- a/pypots/utils/visual/visualizeAttention.py
+++ b/pypots/utils/visual/visualizeAttention.py
@@ -1,16 +1,27 @@
+"""
+Utilities for attention map visualization.
+"""
+
+# Created by Anshuman Swain <aswai@seas.upenn.edu> and Wenjie Du <wenjay.du@gmail.com>
+# License: BSD-3-Clause
+
 import matplotlib.pyplot as plt
 import numpy as np
-import seaborn as sns
 from numpy.typing import ArrayLike
 
+try:
+    import seaborn as sns
+except Exception:
+    pass
+
 
-def visualize_attention(timeSteps: ArrayLike, attention: np.ndarray, fontscale = None):
-    """Visualize the map of attention weights from Transformer-based models
+def plot_attention(timeSteps: ArrayLike, attention: np.ndarray, fontscale=None):
+    """Visualize the map of attention weights from Transformer-based models.
 
     Parameters
     ---------------
     timeSteps: 1D array-like object, preferable list of strings
-        A vector containing the time steps of the input. 
+        A vector containing the time steps of the input.
         The time steps will be converted to a list of strings if they are not already.
 
     attention: 2D array-like object
@@ -30,7 +41,7 @@ def visualize_attention(timeSteps: ArrayLike, attention: np.ndarray, fontscale =
         timeSteps = [str(step) for step in timeSteps]
 
     if fontscale is not None:
-        sns.set_theme(font_scale = fontscale)
+        sns.set_theme(font_scale=fontscale)
 
     fig, ax = plt.subplots()
     ax.tick_params(left=True, bottom=True, labelsize=10)