自动创建字典值？

Question

因此，我有一个列表，其中包含图像路径的字符串：

["folder1/_D7327", "folder1/_D7527", "folder2/_D7455", "folder3/_D1237"]

我想自动创建一个字典来存储每张照片：

{"folder1": ["_D7327", "_D7527"], "folder2": ["_D7455"], "folder3": ["_D1237"]}

我怎样才能自动实现这样的目标

Answer 1

您可以使用dict.setdefault。例如：

lst = ["folder1/_D7327", "folder1/_D7527", "folder2/_D7455", "folder3/_D1237"]

out = {}
for path in lst:
    folder, file = path.split("/")
    out.setdefault(folder, []).append(file)

print(out)

印刷品：

{'folder1': ['_D7327', '_D7527'], 'folder2': ['_D7455'], 'folder3': ['_D1237']}