[英]Calling Tcl procedures with Function pointers as argument from Python
Is it possible to call Tcl procedures that have function pointers (or callback functions) from Python? 是否可以从Python调用具有函数指针(或回调函数)的Tcl过程? I am using Tkinter to call Tcl procedures from Python.
我正在使用Tkinter从Python调用Tcl过程。
Python Snippet : Python片段:
proc callbackFunc():
print "I am in callbackFunc"
cb = callbackFunc
Tkinter.Tk.call('tclproc::RetrieveInfo', cb)
Tcl Snippet : Tcl片段:
proc tclproc::RetrieveInfo() { callback } {
eval $callback
}
Note I cannot modify Tcl code as its an external library to my application. 注意我不能将Tcl代码修改为我的应用程序的外部库。
//Hemanth // Hemanth
Yes, and your pseudocode is pretty close. 是的,你的伪代码非常接近。 You have to register your python code with the Tcl interpreter.
您必须使用Tcl解释器注册您的python代码。 This will create a tcl command that will call your python code.
这将创建一个调用python代码的tcl命令。 You then reference this new tcl command whenever you pass it to a Tcl procedure that expects a procedure name.
然后,每当将其传递给需要过程名称的Tcl过程时,都会引用此新tcl命令。 It goes something like this:
它是这样的:
import Tkinter
root=Tkinter.Tk()
# create a python callback function
def callbackFunc():
print "I am in callbackFunc"
# register the callback as a Tcl command. What gets returned
# must be used when calling the function from Tcl
cb = root.register(callbackFunc)
# call a tcl command ('eval', for demonstration purposes)
# that calls our python callback:
root.call('eval',cb)
A tiny bit of documentation is here: 这里有一些文档:
http://epydoc.sourceforge.net/stdlib/Tkinter.Misc-class.html#register http://epydoc.sourceforge.net/stdlib/Tkinter.Misc-class.html#register
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