python - ValueError: min_faces_per_person=70 is too restrictive -


i'm practicing faces recognition example using eigenfaces , svms on official scikit-learn website.

http://scikit-learn.org/stable/auto_examples/applications/plot_face_recognition.html#sphx-glr-auto-examples-applications-plot-face-recognition-py

but when run here：

from __future__ import print_function  time import time import logging import matplotlib.pyplot plt  sklearn.model_selection import train_test_split sklearn.model_selection import gridsearchcv sklearn.datasets import fetch_lfw_people sklearn.metrics import classification_report sklearn.metrics import confusion_matrix sklearn.decomposition import pca sklearn.svm import svc   print(__doc__)  # display progress logs on stdout logging.basicconfig(level=logging.info, format='%(asctime)s %(message)s')   # ############################################################################# # download data, if not on disk , load numpy arrays  lfw_people = fetch_lfw_people(min_faces_per_person=70, resize=0.4)

but getting error tells me：

traceback (most recent call last):   file "d:\神经网络与深度学习\麦子学院-深度学习\(part one)深度学习基础\代码与素材 \代码与素材(1)\03svm\plot_face_recognition.py", line 54, in <module>     lfw_people = fetch_lfw_people(min_faces_per_person=70, resize=0.4)   file "d:\program files\python36\lib\site-packages\sklearn\datasets\lfw.py", line 335, in fetch_lfw_people     min_faces_per_person=min_faces_per_person, color=color, slice_=slice_)   file "d:\program files\python36\lib\site-packages\sklearn\externals\joblib\memory.py", line 562, in __call__     return self._cached_call(args, kwargs)[0]   file "d:\program files\python36\lib\site-packages\sklearn\externals\joblib\memory.py", line 510, in _cached_call     out, metadata = self.call(*args, **kwargs)   file "d:\program files\python36\lib\site-packages\sklearn\externals\joblib\memory.py", line 744, in call     output = self.func(*args, **kwargs)   file "d:\program files\python36\lib\site-packages\sklearn\datasets\lfw.py", line 231, in _fetch_lfw_people     min_faces_per_person) valueerror: min_faces_per_person=70 restrictive

i don't understand why?my python version 3.6.2, scikit-learn version v0.19.0


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