When written as a sample, webview.load_html() is sometimes called before the webview is ready.

Specification

• Platform: Windows 10 1809 Build 17763.379
• Version: 2.4(Rendering Engine: Trident)

Description

A sample of the load_html() described in sample page is written as follows.

def load_html():
    webview.load_html('<h1>This is dynamically loaded HTML</h1>')

if __name__ == '__main__':
    t = threading.Thread(target=load_html)
    t.start()

    webview.create_window('Load HTML Example')

However, in this case, in a low-spec PC environment, such as the Atom CPU, webview#load_html() is invoked before WebView is ready and may cause an error.

As follows, it seems that it is desirable to perform the ready waiting for WebView.

def load_html():
    webview.webview_ready()
    webview.load_html('<h1>This is dynamically loaded HTML</h1>')

if __name__ == '__main__':
    t = threading.Thread(target=load_html)
    t.start()

    webview.create_window('Load HTML Example')

What to expect.

The program works in many environments by writing it as shown in the sample.

[r0x0r]

I have changed the timeout to 15 seconds and made it to throw a separate exception if the window is not opened by then. Closing this.

[TakamiChie]

When I tried to edit the above line, the error certainly no longer occurred.

        try:
            _webview_ready.wait(10)
            return function(*args, **kwargs)
        except NameError:
            raise Exception('Create a web view window first, before invoking this function')
        except KeyError as e:

• pywebview/WebView/init.py Pre-edited: tried to start 20 times and four times the error.
• After editing: 20 attempts to start and without error.

Also, running the application in GPD Pocket, the error is no longer occur, it is considered to have been sufficiently effective.