How to delete the points that have been typed in the python cv2 module, or how to restore them?

If you are using a camera, you need to use a loop to read the frame continuously.

python] view plain copyc =

while 1:

ret, image =

origin", image) to display the screen.

It must be matched with this sentence to get out of the picture.

2.Await.

Parameter 1: Wait time, in milliseconds.

Generally used in combination.

Another useful feature is to enter the if conditional statement by pressing a key.

For example, press esc to close the window, exit the loop, and end the program.

python] view plain copyc =

while 1:

ret, image =

origin", image)

key =if key == 27:

break

Python is a very popular programming language at the moment, especially when it comes to artificial intelligence applications. If you are interested in working in the direction of programming, it is best to go to a professional organization to study in depth, practice more, and be closer to the market, which is more conducive to future development.

Here's how to uninstall a module that has been installed on python (in this case, uninstall matplotlib as an example):

1.Open the Anaconda software and enter **:p ip uninstall matplotlib under the Anaconda prompt

2.If the deletion fails, find the [matplotlib] file of d: python lib site-packages (the path here varies according to the individual installation path), delete the file directly, and then repeat the first step again.

3.In order to check whether the uninstallation is complete, enter the pip list to view all the modules installed, if the uninstall module is successful, you will no longer see the [matplotlib] module.

The python module is installed in the lib directory under python, or in the lib site-packages directory, and you can delete the module directly if you find it.

Modules installed on python can be installed with pip or execution.

If you're installing with pip, you can use the pip uninstall module name directly.

If you use python install to install, use python uninstall to uninstall.

Find the installation package: you use python install when installing; Uninstall with python uninstall

There is no suitable version, depending on what version of your python is.

"del + module name" can delete the imported module in the shell. For example, to delete the division you have imported, enter the following command in the python shell.

del division

With or without importing a new division, you can use to implement integer division.

So if you want to use truncated division, you can write 5 3

Importing division from future can use both the floating-point division of 5 3 and the integer division of 5 3.

If you have already imported, you cannot delete it. If there are two identical function names, then an alias should be used.

from __future__ import division as f_division

a = f division(args) untruncated division b = division(args) truncated.

Many IDEs come with automatic prompts, such as Wingide and PyCharm.

If you want to install ipython in the shell, press the tab key after typing the click, and you will be prompted.

In the Python native shell, you can use DIR (module or object name) to view the properties of an object.

Hope it helps.

Lilun rocks with python 5,7,1,-1,3,-2,-3

Extract the largest element, delete the minimum wax element, modify the number of spikes closed 7 to 4, remove the negative sign of the negative number, and add the number 6

1、import module

2、module.__version__

where module stands for a specific module).

Example: <>

Looking at the modules that have already been installed, you can consider.

import sys

Satisfied, thank you.

Generally speaking, modules have a property:

Access by doing so.

module.__version__

Or use dir(module) to see if there is a version of the property.