Python3 convert StringVar() to string?

[vailixi]

I'm learning tkinter for python3. I'm trying to use a StringVar() from Entry (txtbox)

txtvara = StringVar()

c=Button(root)
photo1=PhotoImage(file="/root/install.gif")
c.config(image=photo1,width="100",height="30",activebackground="#f2f1f0",bg="#f2f1f0",command=sysinstall)
c.place(x = 100,y = 92)

e=Entry(root, width=12,textvariable=txtvara)
e.place(x = 3, y = 92)

I want to use the text in the system call but I can't even get it to print the variable to console. It just prints PY_VAR1 which I don't really understand.

def sysinstall():
    txtvarb = str(txtvara)
    print(txtvarb)

Question: How do I convert StringVar() into string and use that to change label text in a system call?

[vailixi]

I figured this. .get() will give you the text of the entry box so you can set that as a variable like so.

package=e.get()