os.path.join的作用
时间: 2023-11-23 13:07:10 浏览: 79
`os.path.join()` 方法用于将多个路径组合成一个完整的路径。在 Windows 系统中,使用反斜杠 (\) 作为路径分隔符,在 Unix/Linux 系统中,使用正斜杠 (/) 作为路径分隔符。 `os.path.join()` 方法能够根据当前操作系统自动识别路径分隔符,从而确保生成的路径是正确的。
例如,如果在 Windows 系统上执行以下代码:
```
import os
path = os.path.join('C:\\', 'Users', 'User', 'Desktop', 'file.txt')
print(path)
```
输出将会是:
```
C:\Users\User\Desktop\file.txt
```
而在 Unix/Linux 系统上执行相同的代码:
```
import os
path = os.path.join('/home', 'user', 'Desktop', 'file.txt')
print(path)
```
输出将会是:
```
/home/user/Desktop/file.txt
```
`os.path.join()` 方法不仅可以组合路径,还可以组合文件名和文件夹名,生成一个完整的文件路径。
相关问题
os.path.join作用
os.path.join函数用于合并路径,将多个路径字符串连接起来形成一个完整的路径。它会根据操作系统不同,自动选择适合的路径分隔符。例如,在Unix系统中路径分隔符为“/”,在Windows系统中路径分隔符为“\”。
语法:
os.path.join(path1[, path2[, ...]])
参数说明:
path1, path2, ...: 多个路径字符串,将被连接成一个完整的路径。
返回值:
返回一个字符串,表示连接后的完整路径。
示例:
```
import os
path1 = '/home/user'
path2 = 'documents'
path3 = 'file.txt'
full_path = os.path.join(path1, path2, path3)
print(full_path)
```
输出:
```
/home/user/documents/file.txt
```
将下面代码简洁化:def split_dataset(img_path, target_folder_path, output_path): filename = [] total_imgs = os.listdir(img_path) #for root, dirs, files in os.walk(img_path): for img in total_imgs: filename.append(img) np.random.shuffle(filename) train = filename[:int(len(filename) * 0.9)] test = filename[int(len(filename) * 0.9):] out_images = os.path.join(output_path, 'imgs') if not os.path.exists(out_images): os.makedirs(out_images) out_images_train = os.path.join(out_images, 'training') if not os.path.exists(out_images_train): os.makedirs(out_images_train) out_images_test = os.path.join(out_images, 'test') if not os.path.exists(out_images_test): os.makedirs(out_images_test) out_annotations = os.path.join(output_path, 'annotations') if not os.path.exists(out_annotations): os.makedirs(out_annotations) out_annotations_train = os.path.join(out_annotations, 'training') if not os.path.exists(out_annotations_train): os.makedirs(out_annotations_train) out_annotations_test = os.path.join(out_annotations, 'test') if not os.path.exists(out_annotations_test): os.makedirs(out_annotations_test) for i in train: print(os.path.join(img_path, i)) print(os.path.join(out_images_train, i)) shutil.copyfile(os.path.join(img_path, i), os.path.join(out_images_train, i)) annotations_name = "gt_" + i[:-3] + 'txt' shutil.copyfile(os.path.join(target_folder_path, annotations_name), os.path.join(out_annotations_train, annotations_name)) for i in test: shutil.copyfile(os.path.join(img_path, i), os.path.join(out_images_test, i)) annotations_name = "gt_" + i[:-3] + 'txt' shutil.copyfile(os.path.join(target_folder_path, annotations_name), os.path.join(out_annotations_test, annotations_name))
def split_dataset(img_path, target_folder_path, output_path):
filename = os.listdir(img_path)
np.random.shuffle(filename)
train = filename[:int(len(filename) * 0.9)]
test = filename[int(len(filename) * 0.9):]
out_images = os.path.join(output_path, 'imgs')
os.makedirs(out_images, exist_ok=True)
out_images_train = os.path.join(out_images, 'training')
os.makedirs(out_images_train, exist_ok=True)
out_images_test = os.path.join(out_images, 'test')
os.makedirs(out_images_test, exist_ok=True)
out_annotations = os.path.join(output_path, 'annotations')
os.makedirs(out_annotations, exist_ok=True)
out_annotations_train = os.path.join(out_annotations, 'training')
os.makedirs(out_annotations_train, exist_ok=True)
out_annotations_test = os.path.join(out_annotations, 'test')
os.makedirs(out_annotations_test, exist_ok=True)
for i in train:
img_src = os.path.join(img_path, i)
img_dst = os.path.join(out_images_train, i)
shutil.copyfile(img_src, img_dst)
annotations_name = "gt_" + i[:-3] + 'txt'
annotations_src = os.path.join(target_folder_path, annotations_name)
annotations_dst = os.path.join(out_annotations_train, annotations_name)
shutil.copyfile(annotations_src, annotations_dst)
for i in test:
img_src = os.path.join(img_path, i)
img_dst = os.path.join(out_images_test, i)
shutil.copyfile(img_src, img_dst)
annotations_name = "gt_" + i[:-3] + 'txt'
annotations_src = os.path.join(target_folder_path, annotations_name)
annotations_dst = os.path.join(out_annotations_test, annotations_name)
shutil.copyfile(annotations_src, annotations_dst)
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