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Lazily import matplotlib #5830

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Lazily import matplotlib #5830

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6 changes: 5 additions & 1 deletion mediapipe/python/solutions/drawing_utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,6 @@
from typing import List, Mapping, Optional, Tuple, Union

import cv2
import matplotlib.pyplot as plt
import numpy as np

from mediapipe.framework.formats import detection_pb2
Expand Down Expand Up @@ -281,6 +280,11 @@ def plot_landmarks(landmark_list: landmark_pb2.NormalizedLandmarkList,
"""
if not landmark_list:
return

# Matplotlib is used only here: import it lazily to improve the import
# time of mediapipe for users not calling this function
import matplotlib.pyplot as plt

plt.figure(figsize=(10, 10))
ax = plt.axes(projection='3d')
ax.view_init(elev=elevation, azim=azimuth)
Expand Down