from tkinter import Entry, StringVar, TOP
class traceEntry(Entry):
    def __init__(self, master, **kwargs):
        self.var = StringVar()
        trace = None
        if 'trace' in kwargs.keys():
            trace= kwargs['trace']
            del kwargs['trace']
        kwargs['textvariable'] = self.var
        Entry.__init__(*(self, master), **kwargs)
        if traceis not None:
            self.var.trace('w', command=trace)
    def get(self):
        return self.var.get()

myentrys = {}
for i in range(100):
    myentries["e%s"%i] = traceEntry(root, trace=check)
    myentries["e%s"%i].pack(side=TOP)