小编use*_*271的帖子

我收到一个错误：

COPY失败：stat / var / lib / docker / tmp / docker-builder700869788 / private：无此类文件或目录。

我在Dockerfile中写道：

FROM "centos"

    RUN mkdir ~/.ssh
    COPY ./private ~/.ssh/id_rsa
    RUN yum install -y https://centos7.iuscommunity.org/ius-release.rpm
    RUN yum install -y wget
    RUN yum update -y

当我跑步时docker build ./ -t docker/app，出现错误：

Status: Downloaded newer image for centos:latest
 ---> ff426288ea90
Step 2/22 : RUN mkdir ~/.ssh
 ---> Running in 49d3950mwpion
Removing intermediate container 49d73360f899
 ---> 24shentufhckm
Step 3/22 : COPY ./private ~/.ssh/id_rsa
COPY failed: stat /var/lib/docker/tmp/docker-builder700869788/private: no such …

我收到错误，TypeError: src 不是 numpy 数组，也不是标量。

Traceback says 
Traceback (most recent call last):
  File "img.py", line 19, in <module>
    gray = cv2.cvtColor(images,cv2.COLOR_BGR2GRAY)
TypeError: src is not a numpy array, neither a scalar 

。我写在img.py中

import numpy as np
import cv2
import glob
from PIL import Image

# termination criteria
criteria = (cv2.TERM_CRITERIA_EPS + cv2.TERM_CRITERIA_MAX_ITER, 30, 0.001)

# prepare object points, like (0,0,0), (1,0,0), (2,0,0) ....,(6,5,0)
objp = np.zeros((6*7,3), np.float32)
objp[:,:2] = np.mgrid[0:7,0:6].T.reshape(-1,2)

# Arrays to store object points and image points from …