EXE.pythonEval("{callback}(4*4)", "showResult");
function showResult(res) {
NSB.MsgBox(res);
}
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{{Deprecated|newvarlink=Using Node and Electron to build Desktop Apps|newvarname=Using Node and Electron to build Desktop Apps}} | |||
EXE.pythonEval(''code''[, ''callback'']) | EXE.pythonEval(''code''[, ''callback'']) | ||
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The length of the code string is limited -around 220 characters. However, the return data can be much larger. | The length of the code string is limited -around 220 characters. However, the return data can be much larger. | ||
== Example | == Example == | ||
Do a simple calculation and return the result | Do a simple calculation and return the result | ||
<tabber> | |||
JavaScript= | |||
<syntaxhighlight lang="JavaScript"> | |||
< | |||
< | |||
EXE.pythonEval("{callback}(4*4)", "showResult"); | EXE.pythonEval("{callback}(4*4)", "showResult"); | ||
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NSB.MsgBox(res); | NSB.MsgBox(res); | ||
} | } | ||
</ | </syntaxhighlight> | ||
|-| | |||
BASIC= | |||
<syntaxhighlight lang="vb.net"> | |||
EXE.pythonEval("{callback}(4*4)", "showResult") | |||
Function showResult(res) | |||
MsgBox res | |||
End Function | |||
</syntaxhighlight> | |||
</tabber> | |||
== Other examples == | == Other examples == |
This deprecated feature should no longer be used, but is still available for reasons of backwards compatibility.
Please see Using Node and Electron to build Desktop Apps for an alternative way to use this feature. |
EXE.pythonEval(code[, callback])
EXE.pythonEval executes code in the EXE runtime wrapper. It only works in EXE apps. AppStudio's EXE apps work by wrapping your app in a executable wrapper which is written in Python. This function requires you to know Python to use it.
Code has to be properly formatted Python code, following all Python syntax rules. In addition to the base Python language, the following libraries can be used:
Others may be included in a future release.
Calls to EXE.pythonEval are processed asynchronously. To return values, put {callback}(value) in your code, and supply the name of the function you want called as callback.
The length of the code string is limited -around 220 characters. However, the return data can be much larger.
Do a simple calculation and return the result
EXE.pythonEval("{callback}(4*4)", "showResult");
function showResult(res) {
NSB.MsgBox(res);
}
EXE.pythonEval("{callback}(4*4)", "showResult")
Function showResult(res)
MsgBox res
End Function
Exit the app
EXE.pythonEval("sys.exit(0)")
Put up a wx Message Box:
EXE.pythonEval("wx.MessageBox('It works!', 'Info', wx.OK | wx.ICON_INFORMATION)", "MessageBox")
Run a code snippet. Put the following code into a TextArea:
# Code must be in Python. # note how to return results. a=64 {callback}(a*a)
And execute it as follows:
EXE.pythonEval(TextArea1.value, "showResult")
Get a list of files in the current directory (BASIC):
EXE.pythonEval("{callback}('\r'.join(os.listdir('./')))", "showResult") Function showResult(res) TextArea1.text = res End Function
Get a list of files in the current directory (JavaScript):
EXE.pythonEval("{callback}('\\r'.join(os.listdir('./')))", "showResult"); function showResult(res) { TextArea1.text = res; }
Read a file. (Also: Send multiple lines of code to Python.) (BASIC)
s = "file = open('./package.json')" & vbCRLF s += "{callback}(file.read())" EXE.pythonEval(s, "showResult")
Read a file. (Also: Send multiple lines of code to Python.) (JavaScript)
s = "file = open('./package.json')" + '\n'; s += "{callback}(file.read())"; EXE.pythonEval(s, "showResult");