Pillow rotate 逆时针旋转图片

%matplotlib inline
from PIL import Image
import matplotlib.pyplot as plt

img = Image.open('image.png')

plt.imshow(img)

<matplotlib.image.AxesImage at 0x7f95649654a8>

# 逆时针旋转45度
img_r = img.rotate(45)
plt.imshow(img_r)

<matplotlib.image.AxesImage at 0x7f9564bc4320>

help(img.rotate)

Help on method rotate in module PIL.Image:

rotate(angle, resample=0, expand=0, center=None, translate=None) method of PIL.PngImagePlugin.PngImageFile instance
    Returns a rotated copy of this image.  This method returns a
    copy of this image, rotated the given number of degrees counter
    clockwise around its centre.
    
    :param angle: In degrees counter clockwise.
    :param resample: An optional resampling filter.  This can be
       one of :py:attr:`PIL.Image.NEAREST` (use nearest neighbour),
       :py:attr:`PIL.Image.BILINEAR` (linear interpolation in a 2x2
       environment), or :py:attr:`PIL.Image.BICUBIC`
       (cubic spline interpolation in a 4x4 environment).
       If omitted, or if the image has mode "1" or "P", it is
       set :py:attr:`PIL.Image.NEAREST`. See :ref:`concept-filters`.
    :param expand: Optional expansion flag.  If true, expands the output
       image to make it large enough to hold the entire rotated image.
       If false or omitted, make the output image the same size as the
       input image.  Note that the expand flag assumes rotation around
       the center and no translation.
    :param center: Optional center of rotation (a 2-tuple).  Origin is
       the upper left corner.  Default is the center of the image.
    :param translate: An optional post-rotate translation (a 2-tuple).
    :returns: An :py:class:`~PIL.Image.Image` object.