I would like to know if it\'s possible to force os.walk in python3 to visit directories in alphabetical order. For example, here is a directory and some code that will walk
This answer is not specific to this question and the problem is a little different but the solution can be used in either case.
Consider having these files ("one1.txt"
, "one2.txt"
, "one10.txt"
) and the content of all of them is a String "default"
:
I want to loop through a directory that contains these files and find a specific String in every file and replace it with the name of the file.
If you use any other methods which have already mentioned here and in other questions (like dirs.sort()
and sorted(files)
and sorted(dirs)
, the result will be something like this:
"one1.txt"--> "one10"
"one2.txt"--> "one1"
"one10.txt" --> "one2"
But we want it to be:
"one1.txt"--> "one1"
"one2.txt"--> "one2"
"one10.txt" --> "one10"
I found this method which changes file content alphabetically:
import re, os, fnmatch
def atoi(text):
return int(text) if text.isdigit() else text
def natural_keys(text):
'''
alist.sort(key=natural_keys) sorts in human order
http://nedbatchelder.com/blog/200712/human_sorting.html
(See Toothy's implementation in the comments)
'''
return [ atoi(c) for c in re.split('(\d+)', text) ]
def findReplace(directory, find, replace, filePattern):
count = 0
for path, dirs, files in sorted(os.walk(os.path.abspath(directory))):
dirs.sort()
for filename in sorted(fnmatch.filter(files, filePattern), key=natural_keys):
count = count +1
filepath = os.path.join(path, filename)
with open(filepath) as f:
s = f.read()
s = s.replace(find, replace+str(count)+".png")
with open(filepath, "w") as f:
f.write(s)
Then run this line:
findReplace(os.getcwd(), "default", "one", "*.xml")