Check if a directory exists in a zip file with Python
Initially I was thinking of using os.path.isdir but I don't think this works for zip files. Is there a way to peek into the zip file and verify that this directory exists? I would like to prevent using unzip -l "$@" as much as possible, but if that's the only solution then I guess I have no choice.
Answer
Just check the filename with "/" at the end of it.
import zipfile
def isdir(z, name):
return any(x.startswith("%s/" % name.rstrip("/")) for x in z.namelist())
f = zipfile.ZipFile("sample.zip", "r")
print isdir(f, "a")
print isdir(f, "a/b")
print isdir(f, "a/X")
You use this line
any(x.startswith("%s/" % name.rstrip("/")) for x in z.namelist())
because it is possible that archive contains no directory explicitly; just a path with a directory name.
Execution result:
$ mkdir -p a/b/c/d
$ touch a/X
$ zip -r sample.zip a
adding: a/ (stored 0%)
adding: a/X (stored 0%)
adding: a/b/ (stored 0%)
adding: a/b/c/ (stored 0%)
adding: a/b/c/d/ (stored 0%)
$ python z.py
True
True
False