TypeError:参数应该是字符串、字节或整数，而不是 PosixPath

Question

我的代码在我的Raspberry Pi 4系统(Raspbian(上运行良好，但即使我使用字符串，也会在Petalinux系统中抛出这个奇怪的错误。路径存在，我以 root 身份登录。

法典

import os
from pathlib import Path
...
@app.route("/api/stopRecording")
def stopRecording():
recording_end_datetime = datetime.today().strftime('%m-%d-%Y-%H-%M-%S.mp4')
recordings_folder = '/home/pi/Documents/Recordings/'
f = open("run.pid", "r")
pidnum = int(f.readline())
os.system('kill -15 ' + str(pidnum))
video_filename = str((sorted(Path('/home/pi/Documents/Recordings').iterdir(), key=os.path.getctime))[-1])
if "---.mp4" in video_filename: # No stop timing has been set
os.system('mv "' + video_filename + '" "' + video_filename[:-4] + ' ' + recording_end_datetime + '"')
else: # Stop timing was set
os.system('mv "' + video_filename + '" "' + video_filename[:-24] + ' ' + recording_end_datetime + '"')
return jsonify({'response': 'recording off'})
@app.route("/api/loadRecordings")
def loadRecordings():
paths = sorted(Path('/home/pi/Documents/Recordings').iterdir(), key=os.path.getctime)
spaths = []
for p in paths:
spaths.append(str(p).replace('/home/pi/Documents/Recordings/','').replace('.mp4',''))
return jsonify(listToDict(spaths))

错误

[2020-06-03 21:01:55,591] ERROR in app: Exception on /api/loadRecordings [GET]
Traceback (most recent call last):
File "/usr/local/lib/python3.5/dist-packages/flask/app.py", line 2447, in wsgi_app
response = self.full_dispatch_request()
File "/usr/local/lib/python3.5/dist-packages/flask/app.py", line 1952, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/usr/local/lib/python3.5/dist-packages/flask/app.py", line 1821, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/usr/local/lib/python3.5/dist-packages/flask/_compat.py", line 39, in reraise
raise value
File "/usr/local/lib/python3.5/dist-packages/flask/app.py", line 1950, in full_dispatch_request
rv = self.dispatch_request()
File "/usr/local/lib/python3.5/dist-packages/flask/app.py", line 1936, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "Backend/filetest.py", line 94, in loadRecordings
paths = sorted(Path('/root/web_gui/Recordings').iterdir(), key=os.path.getctime)
File "/usr/lib/python3.5/genericpath.py", line 65, in getctime
return os.stat(filename).st_ctime
TypeError: argument should be string, bytes or integer, not PosixPath

PS：我已经尝试过使用"//根//web_gui//录音"，但出现相同的错误

Answer 1

通过将 Python 更新到 3.6+ 来解决！ 看起来os.path.getctime函数在3.5版本中有点不同

Answer 2

快速摘要

这可能是文件中其他代码的问题。我已经复制了您的代码，它似乎对我有用。(我用...替换了一些路径(

>>> str((sorted(Path('/Users/.../Desktop').iterdir(), key=os.path.getctime))[-1])
'/Users/.../Desktop/Programming'

接下来呢？

• 尝试向此问题添加更多代码。我认为您已经正确识别了这是特定于平台的问题。

在在线Linux上运行良好

>>> str((sorted(Path('/home').iterdir(), key=os.path.getctime))[-1])
'/home/user'