我试图将输入作为图像提供给以下程序，该程序将生成直方图。但是当我通过终端将图像作为输入传递给程序时，它会出错，但是当我对输入进行硬编码时，它不会给出错误。
Mac OS Sierra - 10.13.2
matplotlib - 2.1.1
OpenCV - 3.3
python - 3.6
代码： -
from sys import platform as sys_pf
if sys_pf == 'darwin':
import matplotlib
matplotlib.use("TkAgg")
# import matplotlib
# matplotlib.use("TkAgg")
import cv2
# import numpy as np
from matplotlib import pyplot as plt
import argparse
ap = argparse.ArgumentParser()
ap.add_argument("-i","--image",help="path to image")
args = vars(ap.parse_args())
image = cv2.imread(args["image"])
gray = cv2.cvtColor(image,cv2.COLOR_BGR2GRAY)
cv2.imshow("BGR",image)
cv2.imshow("Gray",gray)
hist = cv2.calcHist([gray],[0],None,[256],[0, 256])
plt.figure()
plt.title("Grayscale Histogram")
plt.xlabel("Bins")
plt.ylabel("# of pixel")
plt.plot(hist)
plt.xlim([0,256])
img = plt.show()
错误： -
(cv) Arjuns-MacBook-Air:computer vision arjungoyal$ python grayscale_hist.py -i grant.jpg
2017-12-15 19:52:21.304 python[2005:77022] -[NSApplication _setup:]: unrecognized selector sent to instance 0x7fdcdad1dd30
2017-12-15 19:52:21.306 python[2005:77022] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSApplication _setup:]: unrecognized selector sent to instance 0x7fdcdad1dd30'
*** First throw call stack:
(
0 CoreFoundation 0x00007fff30a7400b __exceptionPreprocess + 171
1 libobjc.A.dylib 0x00007fff57652c76 objc_exception_throw + 48
2 CoreFoundation 0x00007fff30b0ccd4 -[NSObject(NSObject) doesNotRecognizeSelector:] + 132
3 CoreFoundation 0x00007fff309ea3f0 ___forwarding___ + 1456
4 CoreFoundation 0x00007fff309e9db8 _CF_forwarding_prep_0 + 120
5 Tk 0x00007fff3ceae328 TkpInit + 467
6 Tk 0x00007fff3ce2d262 Tk_Init + 1710
7 _tkinter.cpython-36m-darwin.so 0x0000000109848de3 Tcl_AppInit + 82
8 _tkinter.cpython-36m-darwin.so 0x000000010984454d _tkinter_create + 1040
9 Python 0x000000010297a6c1 _PyCFunction_FastCallDict + 166
10 Python 0x00000001029df00f call_function + 489
11 Python 0x00000001029d7ecc _PyEval_EvalFrameDefault + 4930
12 Python 0x00000001029df7df _PyEval_EvalCodeWithName + 1829
13 Python 0x00000001029e0096 _PyFunction_FastCallDict + 444
14 Python 0x0000000102942ab9 _PyObject_FastCallDict + 196
15 Python 0x0000000102942bdc _PyObject_Call_Prepend + 156
16 Python 0x000000010294293a PyObject_Call + 101
17 Python 0x000000010298d8fa slot_tp_init + 57
18 Python 0x000000010298a846 type_call + 184
19 Python 0x0000000102942a84 _PyObject_FastCallDict + 143
20 Python 0x00000001029defdf call_function + 441
21 Python 0x00000001029d7ecc _PyEval_EvalFrameDefault + 4930
22 Python 0x00000001029e0166 _PyFunction_FastCall + 121
23 Python 0x00000001029defe6 call_function + 448
24 Python 0x00000001029d7ecc _PyEval_EvalFrameDefault + 4930
25 Python 0x00000001029df7df _PyEval_EvalCodeWithName + 1829
26 Python 0x00000001029d6b4f PyEval_EvalCodeEx + 52
27 Python 0x0000000102962c1b function_call + 338
28 Python 0x000000010294293a PyObject_Call + 101
29 Python 0x00000001029d8121 _PyEval_EvalFrameDefault + 5527
30 Python 0x00000001029df7df _PyEval_EvalCodeWithName + 1829
31 Python 0x00000001029dfecb fast_function + 227
32 Python 0x00000001029defe6 call_function + 448
33 Python 0x00000001029d7ecc _PyEval_EvalFrameDefault + 4930
34 Python 0x00000001029df7df _PyEval_EvalCodeWithName + 1829
35 Python 0x00000001029d6b15 PyEval_EvalCode + 43
36 Python 0x00000001029fe25a run_mod + 54
37 Python 0x00000001029fe53a PyRun_FileExFlags + 180
38 Python 0x00000001029fdac7 PyRun_SimpleFileExFlags + 280
39 Python 0x0000000102a11878 Py_Main + 3268
40 python 0x0000000102935e1d python + 7709
41 libdyld.dylib 0x00007fff58242115 start + 1
42 ??? 0x0000000000000004 0x0 + 4
)
libc++abi.dylib: terminating with uncaught exception of type NSException
Abort trap: 6
此外，在此错误之后，python意外退出。 如何删除此错误？