DOWNLOADER COUB's VIDEOS!

+----------------------------------------------------+
| How to use the program?                            |
| 1) Copy link of the coub                           |
| 2) Start xCoub-DL                                  |
| 3) Insert the link  (press a right mouse's button) |
| 4) Click the button "Download"                     |
| 5) It's all ;-)                                    |
| 6) For new downloading press the button "New link" |
+----------------------------------------------------+
#(c) 2017, coded 5n6r
#!/usr/bin/env  python3
from tkinter import *
import requests,urllib.request,sys,json,re,os
def mous(event):
    try:
        cb=app.clipboard_get()
        ii.set(cb)
    except:
        cl()
def runner():
    i=ii.get()
    if i!="":
        if len(sys.argv)>1:
            os.environ["http_proxy"]=sys.argv[1]
        opener=urllib.request.build_opener()
        opener.addheaders=[("User-agent","Mozilla/5.0")]
        st=re.findall(r"/\w+$",i)
        url="http://coub.com//api/v2/coubs"+str("".join(st))
        r = requests.get(url)
        s=r.json()
        try:
            htm5=s["file_versions"]["html5"]["video"]["high"]["url"]
            n=s["file_versions"]["html5"]["video"]["high"]["size"]
        except:
            htm5=s["file_versions"]["html5"]["video"]["med"]["url"]
            n=s["file_versions"]["html5"]["video"]["med"]["size"]
        z=s["channel"]["title"]
        x=s["permalink"]
        txt2.set("Name of the video: "+s["title"][:30]+";\n")
        txt2.set(txt2.get()+"Author of the coub'a: "+z+";")
        txt3.set("Size of the file: "+str(n)+" байт; \n")
        client=opener.open(htm5)
        f=open("video_"+str(x)+".mp4","wb")
        f.write(client.read())
        f.close()
def cl()    :
    app.clipboard_clear()
    txt2.set("\n"+"")
    txt3.set("\n"+"")
    txt4.set("\n"+"")
    ii.set("")
app=Tk()
app.title(chr(10029)*3+" xCoub-DL version 0.0.2 beta "+chr(169)+" 2017, coded by 5n6r "+chr(10029)*3)
app.geometry("590x180")
app.resizable(0,0)
fr0=Frame(app,bd=0,height=12)
fr0.pack(padx=10,pady=10)
fr1=Frame(fr0,bd=2,relief="groove")
fr1.grid(row=0, column=0,pady=5,padx=5)
fr2=Frame(fr0,bd=0)
fr2.grid(row=1, column=0,pady=5,padx=5)
fr3=Frame(fr0,bd=2,relief="groove")
fr3.grid(row=2, column=0,pady=5,padx=5)
ii=StringVar()
ii.set("")
txt2=StringVar()
txt2.set("\n"+"")
txt3=StringVar()
txt3.set("\n"+"")
txt4=StringVar()
txt4.set("\n"+"")
l=Label(fr1,text=">>> Link of the video >>>",height=2)
l.grid(row=0,column=0,pady=5,padx=5)
e=Entry(fr1,textvariable=ii,bd=3,cursor="cross",width=40)
e.focus()
e.grid(row=0,column=1,pady=5,padx=5)
l2=Label(fr2,textvariable=txt2)
l2.grid(row=0,column=0,padx=1,pady=1)
l3=Label(fr2,textvariable=txt3)
l3.grid(row=0,column=1,padx=1,pady=1)
l4=Label(fr2,textvariable=txt4)
l4.grid(row=0,column=2,padx=1,pady=1)
b1=Button(fr3,text="Download!",command=runner,cursor="hand2")
b1.grid(row=0,column=0,padx=3,pady=3)
b2=Button(fr3,text="New link",command=cl,cursor="hand2")
b2.grid(row=0,column=1,padx=3,pady=3)
b3=Button(fr3,text="Exit...",command=app.destroy,cursor="hand2")
b3.grid(row=0,column=2,padx=3,pady=3)
e.bind("<Button-3>",mous)
app.mainloop()