Academic Search Application Python v0.2

from webbrowser import open
from tkinter import Tk, Button, Entry, mainloop, END
from tkinter.ttk import Button, Entry
m=Tk()
def bpm():
    open("www.ncbi.nlm.nih.gov/pubmed/?term="+es.get())
def bsc():
    open("www.ncbi.nlm.nih.gov/pubmed/?term="+es.get())
    open("http://scholar.google.com.tr/scholar?hl=tr&q="+es.get())
def bcc():
    es.delete(0,END)
es=Entry(m)
es.grid(row=0,column=1)
bs=Button(m,text="Search",command=bsc)
bs.grid(row=0,column=0)
bc=Button(m,text="Clear",command=bcc)
bc.grid(row=1,column=0)
bq=Button(m,text="Quit",command=m.destroy)
bq.grid(row=1,column=1,sticky="w")
bpm=Button(m,text="PMID",command=bpm)
bpm.grid(row=0,column=2)
m.title("Search Tool")
mainloop()

# - Added PMID Search.
# - Condensed code for easy compilation process.