tt = 100
print tt

tt0 = tt<<1
tt1 = tt>>1
tt2 = tt>>2
tt3 = tt>>3
print tt0
print tt1
print tt2
print tt3

id = "167772160"
result = int(id)
print result
sct = result >> 27
print sct
result1 = result - (sct<<27)
print result1
eb = result1 >> 25
print "eb="+str(eb)
result2 = result1 - (eb << 25)
l1 = (result2 >> 21)
if (eb == 1):
  bar = l1 + 3
if (eb == 0 or eb == 2):
  bar = l1 + 1
print "bar="+str(bar)
result3 = result2 - (l1 << 21)
phi = result3 >> 15
print "phi="+str(phi)
result4 = result3 - (phi << 15)
eta = (result4 >> 11) - 6;
print "eta="+str(eta)

-------------------------------output---------------------
$ python bitshift.py
100    <===== tt = 100   print tt   [0110 0100]=64+32+4=100
200  <==== tt0 = tt<<1  (1 bit shift to left)  [1100 1000]=128+64+8=200
50    <==== tt1 = tt>>1  (1 bit shift to right) [0011 0010]=32+16+2= 50
25    <==== tt2 = tt>>2  (2 bit shift to right)
12    <==== tt3 = tt>>3  (3 bit shift to right) [0000 1100]=8+4=12
167772160
1
33554432
eb=1
bar=3
phi=0
eta=-6