[英]IOError for savefig JPG in matplotlib
我正在尝试保存JPG并遇到问题。 下面给出了“ IOError:写入图像文件时编码器错误-2”
import matplotlib.pyplot as plt
plt.plot([1, 2])
plt.savefig('image.jpg')
它与png兼容,所以我尝试:
pip install pillow
如此处建议的那样,但它已安装在Canopy中。 似乎它可能与此错误有关。 我尝试使用直接路径,但这也不起作用。
完整错误消息如下
Wrong JPEG library version: library is 62, caller expects 70
---------------------------------------------------------------------------
IOError Traceback (most recent call last)
/tmp/tmpMQF4j1.py in <module>()
1 import matplotlib.pyplot as plt
2 plt.plot([1, 2])
----> 3 plt.savefig('image.jpg')
/home/keith/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/pyplot.pyc in savefig(*args, **kwargs)
575 def savefig(*args, **kwargs):
576 fig = gcf()
--> 577 res = fig.savefig(*args, **kwargs)
578 draw() # need this if 'transparent=True' to reset colors
579 return res
/home/keith/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/figure.pyc in savefig(self, *args, **kwargs)
1468 self.set_frameon(frameon)
1469
-> 1470 self.canvas.print_figure(*args, **kwargs)
1471
1472 if frameon:
/home/keith/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/backends/backend_qt5agg.pyc in print_figure(self, *args, **kwargs)
159
160 def print_figure(self, *args, **kwargs):
--> 161 FigureCanvasAgg.print_figure(self, *args, **kwargs)
162 self.draw()
163
/home/keith/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/backend_bases.pyc in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)
2192 orientation=orientation,
2193 bbox_inches_restore=_bbox_inches_restore,
-> 2194 **kwargs)
2195 finally:
2196 if bbox_inches and restore_bbox:
/home/keith/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/backends/backend_agg.pyc in print_jpg(self, filename_or_obj, *args, **kwargs)
577 options['quality'] = rcParams['savefig.jpeg_quality']
578
--> 579 return image.save(filename_or_obj, format='jpeg', **options)
580 print_jpeg = print_jpg
581
/home/keith/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/PIL/Image.pyc in save(self, fp, format, **params)
1691
1692 try:
-> 1693 save_handler(self, fp, filename)
1694 finally:
1695 # do what we can to clean up
/home/keith/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/PIL/JpegImagePlugin.pyc in _save(im, fp, filename)
695 bufsize = max(ImageFile.MAXBLOCK, bufsize, len(info.get("exif", b"")) + 5)
696
--> 697 ImageFile._save(im, fp, [("jpeg", (0, 0)+im.size, 0, rawmode)], bufsize)
698
699
/home/keith/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/PIL/ImageFile.pyc in _save(im, fp, tile, bufsize)
495 s = e.encode_to_file(fh, bufsize)
496 if s < 0:
--> 497 raise IOError("encoder error %d when writing image file" % s)
498 e.cleanup()
499 try:
IOError: encoder error -2 when writing image file
程序包管理器有一个Canopy功能,它知道已安装程序包但不使用它。 这意味着,如果您尝试为Canopy终端安装或升级枕头,它将无能为力。 要访问枕头,您必须通过包装管理器进行操作。
在此机盖无法使用之前,已安装了枕头。
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