def search_module(bec,lay,eta,phi):
  n = 0
  while n < 4088:
    if bec==Bec[n] and lay==Lay[n] and eta==Eta[n] and phi==Phi[n]:
      break
    n += 1
  return (Typ[n],Alias[n])　　　 <=====ここに注目


Bec = [0]*4088;Lay = [0]*4088;Eta = [0]*4088;Phi = [0]*4088
Typ = [0]*4088;Alias = [0]*4088



n=0
f = open("AliasDB.txt","r")
for r in f:
   a = r.split()
   Bec[n] = int(a[0]);  Lay[n] = int(a[1])
   Eta[n] = int(a[2]);  Phi[n] = int(a[3])
   Typ[n] = int(a[4]);  Alias[n] = a[5]
   n += 1
f.close()

bec=1
lay=5
phi=25
eta=-6
typ, alias = search_module(bec,lay,eta,phi)  <=====ここに注目
print "%d %d %d %d %d %s" %(bec,lay,phi,eta,typ,alias)


-------------------------------output---------------------
$ python read_aliasDB.py
1 5 25 -6 111 SCT/PS/BARREL/Q3/BARREL5/B507_Loop109/CapilliaryC/Inlet/Pipe25/ModuleC6