Windows path object is not iterable

whenever I run the server or executing any commands in the terminal this error is showing in the terminal. The server is running and the webpage is working fine but when I quit the server or run any commands(like python manage.py migrate) this error is showing.

   `Watching for file changes with StatReloader
    Performing system checks...
    
    System check identified no issues (0 silenced).
    September 21, 2020 - 12:42:24
    Django version 3.0, using settings 'djangoblog.settings'
    Starting development server at http://127.0.0.1:8000/
    Quit the server with CTRL-BREAK.

Traceback (most recent call last):
  File "manage.py", line 22, in <module>
    main()
  File "manage.py", line 18, in main
    execute_from_command_line(sys.argv)
  File "C:Python37libsite-packagesdjangocoremanagement__init__.py", line 401, in execute_from_command_line
    utility.execute()
  File "C:Python37libsite-packagesdjangocoremanagement__init__.py", line 395, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "C:Python37libsite-packagesdjangocoremanagementbase.py", line 341, in run_from_argv
    connections.close_all()
  File "C:Python37libsite-packagesdjangodbutils.py", line 230, in close_all
    connection.close()
  File "C:Python37libsite-packagesdjangoutilsasyncio.py", line 24, in inner
    return func(*args, **kwargs)
  File "C:Python37libsite-packagesdjangodbbackendssqlite3base.py", line 261, in close
    if not self.is_in_memory_db():
  File "C:Python37libsite-packagesdjangodbbackendssqlite3base.py", line 380, in is_in_memory_db
    return self.creation.is_in_memory_db(self.settings_dict['NAME'])
  File "C:Python37libsite-packagesdjangodbbackendssqlite3creation.py", line 12, in is_in_memory_db
    return database_name == ':memory:' or 'mode=memory' in database_name
TypeError: argument of type 'WindowsPath' is not iterable
`

import numpy as np
import os
import cv2
import matplotlib.pyplot as plt
from os import listdir

from pathlib import Path

all_images = list(Path(r'D:/face/train').glob('**/*.jpg'))
np.array([np.array(cv2.imread(str(file))).flatten() for file in all_images])
Path = r'D:facetrain'
print(all_images[0])

train_images = ([x for x in all_images if val_families not in x])
val_images = ([x for x in all_images if val_families in x])

TypeError                                 Traceback (most recent call last)
<ipython-input-8-8de97a2e12c1> in <module>
----> 1 train_images = ([x for x in all_images if val_families not in x])
  2 val_images = ([x for x in all_images if val_families in x])

<ipython-input-8-8de97a2e12c1> in <listcomp>(.0)
----> 1 train_images = ([x for x in all_images if val_families not in x])
  2 val_images = ([x for x in all_images if val_families in x])

TypeError: argument of type 'WindowsPath' is not iterable

 all_images = glob(train_folders_path + "*/*/*.jpg")
 print(all_images[0])

1 ответ

Лучший ответ

>>> from pathlib import Path
>>> 
>>> path = Path('foo')
>>> path
PosixPath('foo')
>>>
>>> for x in path:
...   print(x)
... 
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'PosixPath' object is not iterable
>>> 
>>> for x in str(path):
...   print(x)
... 
f
o
o
>>> 

Created on 2020-08-27 14:25 by rasjani, last changed 2022-04-11 14:59 by admin.

Messages (5)
msg375993 — (view)	Author: Jani Mikkonen (rasjani)	Date: 2020-08-27 14:25
Following code: ``` from pathlib import Path import os import subprocess dir_name = os.environ.get("WORKSPACE", None) or "." output_directory = Path(dir_name) / "results" res = subprocess.run(["mytest", "--output", output_directory]) ``` Works on macos and linux but on windows, this causes "TypeError: argument of type 'WindowsPath' is not iterable" at https://github.com/python/cpython/blob/master/Lib/subprocess.py#L568 (line is different, depending on the actual python release but i guess that gives the idea where it is).. Quick test to check if i can do `" " in Path("/tmp")` on posix platforms shows the same exception but with PosixPath type but apparently this sort of check does not happen on those platforms as the example code works fine there. It would be nice to be able to pass path objects to subprocess api calls also in windows without explicitly casting the object into string before passing it as argument.
msg375995 — (view)	Author: Karthikeyan Singaravelan (xtreak) *	Date: 2020-08-27 14:40
See also https://bugs.python.org/issue31961
msg376024 — (view)	Author: Jani Mikkonen (rasjani)	Date: 2020-08-28 08:59
@xtreak I went thru the comments of the report you linked. It definitely looks like the discussion was related but it didnt really fix the issue here. https://bugs.python.org/issue31961#msg311775 without trying out, that comment actually touches the underlying issue, on windows, list2cmdline throws that typeerror because iterated argument list (output_directory in my example) is WindowsPath and thus not iterable and and testing the arg with "in" operator fails ..
msg376043 — (view)	Author: Serhiy Storchaka (serhiy.storchaka) *	Date: 2020-08-28 16:10
I do not understand how you get this result. At that line of code arg can only be string, because it is a result of os.fsdecode(). Are you sure that you use Python version which includes issue31961 changes? What exactly Python version do you use?
msg376760 — (view)	Author: Terry J. Reedy (terry.reedy) *	Date: 2020-09-12 01:28
I closed #41753 as a duplicate of this. On that issue, Eryk Sun said "The underlying subprocess.Popen class was updated in 3.8 to support path-like objects in `args` (with shell=False) and `executable` on Windows [1]. This change was not backported to 3.6 and 3.7." The latter is because 3.6 and 3.7 only get security patches. Jani, please verify that this is still an issue with 3.8 and/or 3.9.

(env) C:UsersAmitesh SethiOneDriveDesktopTdjsocial>python manage.py migrate
Traceback (последний последний вызов):
Файл «C:UsersAmitesh SethiOneDriveDesktopTdjsocialmanage.py», строка 22, in
main()
Файл «C:UsersAmitesh SethiOneDriveDesktopTdjsocialmanage.py», строка 18, in main
execute_from_command_line(sys.argv)
Файл «C:UsersAmitesh SethiOneDriveDesktopTdjenvlibsite-packagesdjangocoremanagement_init_.py», строка 419, in execute_from_command_line
utility.execute()
Файл «C:UsersAmitesh SethiOneDriveDesktopTdjenvlibsite-packagesdjangocoremanagement_init_.py», строка 413, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
Файл «C:UsersAmitesh SethiOneDriveDesktopTdjenvlibsite-packagesdjangocoremanagementbase.py», строка
354, in run_from_argv
self.execute(*args, **cmd_options)
Файл «C:UsersAmitesh SethiOneDriveDesktopTdjenvlibsite-packagesdjangocoremanagementbase.py», строка
398, in execute
output = self.handle(*args, **options)
Файл «C:UsersAmitesh SethiOneDriveDesktopTdjenvlibsite-packagesdjangocoremanagementbase.py», строка
89, в wrapped
res = handle_func(*args, **kwargs)
Файл «C:UsersAmitesh SethiOneDriveDesktopTdjenvlibsite-packagesdjangocoremanagementcommandsmigrate.py», строка 75, в handle
self.check(databases=[database])
Файл «C:UsersAmitesh SethiOneDriveDesktopTdjenvlibsite-packagesdjangocoremanagementbase.py», строка
419, в check
all_issues = checks.run_checks(
Файл «C:UsersAmitesh SethiOneDriveDesktopTdjenvlibsite-packagesdjangocorechecksregistry.py», строка
76, in run_checks
new_errors = check(app_configs=app_configs, databases=databases)
Файл «C:UsersAmitesh SethiOneDriveDesktopTdjenvlibsite-packagesdjangocontribstaticfileschecks.py», строка 7, в check_finders
for finder in get_finders():
File «C:UsersAmitesh SethiOneDriveDesktopTdjenvlibsite-packagesdjangocontribstaticfilesfinders.py», line 281, in get_finders
yield get_finder(finder_path)
Файл «C:UsersAmitesh SethiOneDriveDesktopTdjenvlibsite-packagesdjangocontribstaticfilesfinders.py», строка 294, in get_finder
return Finder()
Файл «C:UsersAmitesh SethiOneDriveDesktopTdjenvlibsite-packagesdjangocontribstaticfilesfinders.py», строка 57, in init
for root in settings.STATICFILES_DIRS:
TypeError: объект ‘WindowsPath’ не является итерируемым

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