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This article mainly introduces the relevant knowledge of "how to use win32api to automatically wake up and take screenshots in Python". The editor shows you the operation process through an actual case. The operation method is simple, fast and practical. I hope this article "how to use win32api in Python to automatically wake up and take screenshots" can help you solve the problem.

1. Prepare for

Before you begin, make sure that Python and pip are successfully installed on your computer. If not, you can visit this article: hyperdetailed Python installation Guide for installation.

(optional 1) if you use Python for data analysis, you can directly install Anaconda: Python data analysis and mining helper-Anaconda, which has built-in Python and pip.

(optional 2) in addition, it is recommended to use the VSCode editor, which has many advantages: the best partner for Python programming-VSCode detailed guide.

Please choose any of the following ways to enter the command to install dependencies:

1. Windows environment opens Cmd (start-run-CMD).

2. Open Terminal in MacOS environment (enter Terminal in command+ space).

3. If you are using a VSCode editor or Pycharm, you can use Terminal directly at the bottom of the interface.

Pip install pypiwin32pip install pillow2. How to get window coordinates

Through the FindWindow function of win32gui, we can easily find the window of any process:

Import win32api, win32con, win32guidef get_window_pos (name): name = name handle = win32gui.FindWindow (0, name) # get window handle if handle = = 0: return None else: return win32gui.GetWindowRect (handle) x1

Results:

> > python 1.py

# (349, 83, 1549, 1013)

The tuple in the output is the window information (x1, y1, x2, y2):

(x1, y1) is the coordinate of the upper-left corner of the window.

(x2, y2) is the coordinate of the lower right corner of the window.

We can use this information to take screenshots with PIL. But before we do that, we have two more problems to solve:

1. The window is not on the current interface and is covered by other software at the bottom, so you need to highlight the window.

two。 What if the window is minimized?

2.win32gui highlight window

In order for the window that is stacked on the bottom to be displayed at the top, we need to get the handle of the window and highlight it.

You can easily implement this feature with win32gui. When we first got the coordinate information, we already got handle. Just call a SetForegroundWindow method:

Import win32api, win32con, win32guidef get_window_pos (name): name = name handle = win32gui.FindWindow (0, name) # get window handle if handle = = 0: return None else: # returns coordinate values and handle return win32gui.GetWindowRect (handle), handle (x1, y1, x2, y2), handle = get_window_pos (Blizzard Battle.net) text = win32gui.SetForegroundWindow (handle)

In this way, the window that is covered to the bottom can be placed on the top, as shown in the following figure.

3. Restore the minimize window

Another special case is that the window is shrunk, so we need to restore the minimized window, which is very simple, as long as we use win32gui and win32con to send a message to the window.

Import win32api, win32con, win32guidef get_window_pos (name): name = name handle = win32gui.FindWindow (0, name) # get window handle if handle = = 0: return None else: # returns coordinate values and handle return win32gui.GetWindowRect (handle), handle (x1, y1, x2, y2), handle = get_window_pos (Blizzard Battle.net) win32gui.SendMessage (handle, win32con.WM_SYSCOMMAND, win32con.SC_RESTORE 0) # send the message to restore the minimized window win32gui.SetForegroundWindow (handle) # set to highlight

The effect is shown in the figure:

4. Screenshot

Finally, you can try our complete code. Use the PIL module to capture screenshots for the specified coordinates. The code is as follows:

Import win32api, win32con, win32guidef get_window_pos (name): name = name handle = win32gui.FindWindow (0, name) # get window handle if handle = = 0: return None else: # returns coordinate values and handle return win32gui.GetWindowRect (handle), handle (x1, y1, x2, y2), handle = get_window_pos (Blizzard Battle.net) win32gui.SendMessage (handle, win32con.WM_SYSCOMMAND, win32con.SC_RESTORE 0) # send the message to restore the minimized window win32gui.SetForegroundWindow (handle) # set to highlight from PIL import Image, ImageGrabimg_ready = ImageGrab.grab ((x1, y1, x2, y2)) # screenshot img_ready.show () # display

The effect is as follows:

This feature is easy to use, for example, you need to monitor the operation of a window, it is impossible to observe it all the time, you can use the while loop to call this window screenshot script, first take a screenshot to save.

This is the end of the introduction to "how to use win32api to automatically wake up and take screenshots in Python". Thank you for reading. If you want to know more about the industry, you can follow the industry information channel. The editor will update different knowledge points for you every day.

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