Python参数语法错误: invalid syntax

Question

我有很多 bash 相关的编程技能，但我的 Python 技能有所欠缺。我似乎无法做一些像让用户输入图像的两个参数那么简单的事情。

代码应该从不同的参数获取两个图像，然后在输出新图像之前对它们运行“match_color”函数。

这是我的代码:

from types import SimpleNamespace
import argparse 

@click.argument('-target_image', type=click.Path(exists=True))
@click.argument('-source_image', type=click.Path(exists=True))
#Specify the name of the output file.
#@click.argument('-out_file', type=click.Path(exists=True))



parser = argparse.ArgumentParser()
args.parser.parse_args
args = SimpleNamespace(**kwargs)
target_img = Image.open(args.target_image)
source_img = Image.open(args.source_image)




def match_color(target_img, source_img, mode='pca', eps=1e-5):
    '''
    Matches the colour distribution of the target image to that of the source image
    using a linear transform.
    Images are expected to be of form (w,h,c) and float in [0,1].
    Modes are chol, pca or sym for different choices of basis.
    '''
    mu_t = target_img.mean(0).mean(0)
    t = target_img - mu_t
    t = t.transpose(2,0,1).reshape(3,-1)
    Ct = t.dot(t.T) / t.shape[1] + eps * eye(t.shape[0])
    mu_s = source_img.mean(0).mean(0)
    s = source_img - mu_s
    s = s.transpose(2,0,1).reshape(3,-1)
    Cs = s.dot(s.T) / s.shape[1] + eps * eye(s.shape[0])
    if mode == 'chol':
        chol_t = np.linalg.cholesky(Ct)
        chol_s = np.linalg.cholesky(Cs)
        ts = chol_s.dot(np.linalg.inv(chol_t)).dot(t)
    if mode == 'pca':
        eva_t, eve_t = np.linalg.eigh(Ct)
        Qt = eve_t.dot(np.sqrt(np.diag(eva_t))).dot(eve_t.T)
        eva_s, eve_s = np.linalg.eigh(Cs)
        Qs = eve_s.dot(np.sqrt(np.diag(eva_s))).dot(eve_s.T)
        ts = Qs.dot(np.linalg.inv(Qt)).dot(t)
    if mode == 'sym':
        eva_t, eve_t = np.linalg.eigh(Ct)
        Qt = eve_t.dot(np.sqrt(np.diag(eva_t))).dot(eve_t.T)
        Qt_Cs_Qt = Qt.dot(Cs).dot(Qt)
        eva_QtCsQt, eve_QtCsQt = np.linalg.eigh(Qt_Cs_Qt)
        QtCsQt = eve_QtCsQt.dot(np.sqrt(np.diag(eva_QtCsQt))).dot(eve_QtCsQt.T)
        ts = np.linalg.inv(Qt).dot(QtCsQt).dot(np.linalg.inv(Qt)).dot(t)
    matched_img = ts.reshape(*target_img.transpose(2,0,1).shape).transpose(1,2,0)
    matched_img += mu_s
    matched_img[matched_img>1] = 1
    matched_img[matched_img<0] = 0
    return matched_img

 matched_img.save('out.png')

当尝试运行代码时，我收到此错误:

ubuntu@ubuntu-VirtualBox:/media/ubuntu/Transfer$ python3 linear-color-transfer.py -target_image fig4_style3.jpg -source_image fig4_content.jpg
  File "linear-color-transfer.py", line 11
    parser = argparse.ArgumentParser()
         ^
SyntaxError: invalid syntax
ubuntu@ubuntu-VirtualBox:/media/ubuntu/Transfer$

任何帮助将不胜感激。

Answer 1

@click 命令应与函数一起使用

你的代码应该是这样的:

@click.argument('-target_image', type=click.Path(exists=True))
@click.argument('-source_image', type=click.Path(exists=True))
def match_color(target_img, source_img, mode='pca', eps=1e-5):
    #body