recursion

问题 I have a directory which contains a lot of folders. I want to list all folder (path) that go deeper than 2 levels. So in below case folder 1 & 2. Directory/folder1 Directory/folder1/test1/test/testsub Directory/folder1/test2 Directory/folder1/test3 Directory/folder2/blablabla/bla/1 Directory/folder3/test Directory/folder4/test Directory/folder5/test I was trying the following: $Depth = 3 $Path = "." $Levels = "\*" * $Depth $Folder = Get-Item $Path $FolderFullName = $Folder.FullName Resolve

问题 I have a directory which contains a lot of folders. I want to list all folder (path) that go deeper than 2 levels. So in below case folder 1 & 2. Directory/folder1 Directory/folder1/test1/test/testsub Directory/folder1/test2 Directory/folder1/test3 Directory/folder2/blablabla/bla/1 Directory/folder3/test Directory/folder4/test Directory/folder5/test I was trying the following: $Depth = 3 $Path = "." $Levels = "\*" * $Depth $Folder = Get-Item $Path $FolderFullName = $Folder.FullName Resolve

问题 I have a directory which contains a lot of folders. I want to list all folder (path) that go deeper than 2 levels. So in below case folder 1 & 2. Directory/folder1 Directory/folder1/test1/test/testsub Directory/folder1/test2 Directory/folder1/test3 Directory/folder2/blablabla/bla/1 Directory/folder3/test Directory/folder4/test Directory/folder5/test I was trying the following: $Depth = 3 $Path = "." $Levels = "\*" * $Depth $Folder = Get-Item $Path $FolderFullName = $Folder.FullName Resolve

问题 I can't find any advice on how to deal with infinite recursion in R. I would like to illustrate my problem in the most general way so that others can benefit from it. Feel free to edit it. I used to run a double for loop for (k in 1:n){ for (i in 1:m){ f[i,,k] <- an expression that depends on g[i-1,,k] g[i,,k] <- a mixture of g[i-1,,k] and f[i,,k]}} This was running fine but now I hoped to find the k that would best fit my criterion. So I decided to turn it into a function so that i could

问题 I looked over Python Docs (I may have misunderstood), but I didn't see that there was a way to do this (look below) without calling a recursive function. What I'd like to do is generate a random value which excludes values in the middle. In other words, Let's imagine I wanted X to be a random number that's not in range(a - b, a + b) Can I do this on the first pass, or 1. Do I have to constantly generate a number, 2. Check if in range() , 3. Wash rinse ? As for why I don't wish to write a

问题 I have the following code as part of a Python file, and it traverses .py files in the folder called controllers, and preforms some operations with them. This is my prototype, but now I want to use os.walk to recurse into the folders. controller_folder_path = "applications/%s/controllers/*.py" % application_name for module_path in glob.glob(controller_folder_path): print module_path Any help? 回答1: import os controller_folder_path = "applications/%s/controllers" % application_name for root,

问题 So we have a problem where we need to crawl through hundreds of thousands of images and rename all of them to comply with ASCII standards. After doing a lot of research online, we found this handy piece of code: mv 'file' $(echo 'file' | sed -e 's/[^A-Za-z0-9._-]/_/g') sourced from: How to remove invalid characters from filenames I have tried merging it into a recursive find command, to be run whilst in our main images directory: find . -print0 | xargs -0 mv $(echo | sed -e 's/[^A-Za-z0-9._-]

问题 I have a nested structure read from YAML which is composed of nested lists and/or nested dicts or a mix of both at various levels of nesting. It can be assumed that the structure doesn't contain any recursive objects. How do I extract from it the leaf values only? Also, I don't want any None value. The leaf values contain strings which is all I care for. It's okay for recursion to be used, considering that the maximum depth of the structure is not large enough to exceed stack recursion limits

问题 I write a function to copy files from directory A to directory B recursive. The code is like this: import os import shutil import sys from os.path import join, exists def copy_file(src, dest): for path, dirs, files in os.walk(src, topdown=True): if len(dirs) > 0: for di in dirs: copy_file(join(path, di), join(dest, di)) if not exists(dest): os.makedirs(dest) for fi in files: shutil.copy(join(path, fi), dest) In my test, the input args are like this: src = d:/dev and it have one sub directory

问题 Just started to deal with recursion - I don’t understand everything in it yet. I think that i don't use a basic conditional, but i don't have any idea how to write it. The program itself works and execute everything i need, but there is no recursion. The idea of the program is that there is a list in which is neede to sum of every x'th number in the list - x here as a step. If x = 0, then the sum is automatically zero. If x is out of range, then the sum is also 0 def sum_elements(nums, x) ->