os.remove()删除文件报错，是什么原因？

[i14v]

import sensor, image, time, os

from pid import PID
from pyb import Servo
from pyb import LED
from pyb import Pin
from pyb import UART

pan_servo=Servo(1)
tilt_servo=Servo(2)

p_out = Pin('P6', Pin.OUT_PP)

pan_servo.calibration(500,2500,500)
tilt_servo.calibration(500,2500,500)

red_threshold  = (9, 39, 20, 102, 3, 101)
fire_threshold = (90, 100, -7, 56, -32, 4)
m_threshold = (9, 39, 20, 102, 3, 101)

pan_pid = PID(p=0.04, i=0.02, d=0.004,imax=90) #脱机运行或者禁用图像传输，使用这个PID
tilt_pid = PID(p=0.03, i=0.015, d=0.004,imax=90) #脱机运行或者禁用图像传输，使用这个PID
#pan_pid = PID(p=0.1, i=0, imax=90)#在线调试使用这个PID
#tilt_pid = PID(p=0.1, i=0, imax=90)#在线调试使用这个PID
print('mulu', os.listdir(os.getcwd()))
os.remove("temp")

运行结果：mulu ['.openmv_disk', 'temp', 'README.txt', 'System Volume Information', 'tanke.pgm', 'pid.py', 'main.py']
File “”, line 32, in
OSError: [Errno 21] EISDIR

没有插sd卡，想删除temp这个文件，为什么会报错？

[kidswong999]

os.remove() 只能删除文件，不能删除目录

https://www.runoob.com/python/os-remove.html