doublechenchenchen的博客

conda install av -c conda-forge

conda install pillow=6.1

让一个文件夹变成python的包，然后才可以通过文件夹名引用里面的module简化外面的调用者，引用更加简单

cd ~/catkin_ws/srccatkin_create_pkg beginner_tutorials std_msgs rospy roscppcd ~/catkin_wscatkin_make. ~/catkin_ws/devel/setup.bash

在python2.7的环境中python2.7 -m pip install pyyaml

查看pip install numpy中numpy安装的地方： /usr/local/lib/pthon2.7/dist-packagesimport syssys.path.append('/usr/local/lib/python2.7/dist-packages')sudo gedit ~/.bashrcexport PYTHONPATH=$PYTHON:/...

pip install virtualenvpip install virtualenvwrappermkdir $HOME/.virtualenvsvim ~/.bashrc在末尾加上三行：export WORKON_HOME=$HOME/.virtualenvsVIRTUALENVWRAPPER_PYTHON=/usr/bin/python3.5sour...

rr+ww+a 写内容， 不覆盖内容a+ 可读可写，不覆盖内容

from PIL import Image im = Image.open("a.png")rgb_im = im.convert('RGB')rgb_im.save('color.jpg')

sudo apt-get install filezilla

import osimport cv2image = cv2.imread('img1.jpg')cropImg = image[int(302-150):int(302+150), int(278-150):int(278+150)]cv2.imwrite('crop1.jpg', cropImg)

import scipy.io as sioimport numpy as npimport h5pyimport osIMG_PATH= '../../data/my_bus/images/'SAVE_PATH = '../../data/my_bus/'ANNOT_PATH = '../../data/my_bus/Annotations'if not os.path.exists(SAVE_...

1. 创建一般的多维数组import numpy as npa = np.array([1,2,3], dtype=int)type(a)a.shapea.dtype.namea.sizea.itemsizeb=np.array([1,2,3],[4,5,6], dtype=int)b.shapeb.sizeb.itemsizec = np.ones((2,3,4), dtype = np.int...

sudo snap install pycharm-community --classicrun:     pycharm-community