Simplify intervals skips and fix throughput computation per second

Don't use Excel dates, do all the tests in python datetime class
Aslo, we need to divide by the actual duration of the interval to
get a viable throughput per second for when some data are missing

plog95.py

@@ -10,13 +10,8 @@ import gzip
 import lzma
 
 def to_date(s):
-    dt=datetime.datetime.strptime(s,"%a %b %d %H:%M:%S %Z %Y")-datetime.datetime(1899,12,30)
-    return dt.days+(dt.seconds+dt.microseconds*1.0e-6)/86400.0
-
-def to_datetime(xd):
-    return datetime.datetime(1900,1,1)+datetime.timedelta(xd)
-
-
+    dt=datetime.datetime.strptime(s,"%a %b %d %H:%M:%S %Z %Y")
+    return dt
 
 
 b_or_p=sys.argv[1] # "b" or "p"
@@ -74,21 +69,19 @@ for t in t_l:
         iface_d[i]=None
 
 iface_l=iface_d.keys()
-#iface_l.sort()
-#print(iface_l)
 
-#print "T,",",".join(iface_l)
 prev={}
-for i in iface_l:
-    prev[i]=None
 t0=t_l[0]
-tn0=0
+for i in iface_l:
+    prev[i]=d[t0][i][b_or_p][txrx]
+tn0=t_l[0]
 mb_l=[]
 for t in t_l:
-    tn=int(86400.0*(t-t0)/300.0)
-    if tn<=tn0 and t!=t0: continue
-    tn0=tn
-    s="%f"%t
+    # print(t, " ", tn0, " ", tn0 + datetime.timedelta(minutes=5))
+    if (t < tn0 + datetime.timedelta(minutes=5)): continue
+    delta = (t - tn0).seconds
+    # if (delta > 450): print("xxxx ", tn0, " ", t, " ", delta)
+    tn0=t
     tot_mbit_s = 0.0;
     for i in iface_l:
         y=0
@@ -98,14 +91,12 @@ for t in t_l:
         if prev[i]!=None and x!=None:
             y=x-prev[i]
         if y<0.0: y=0
-        s+=",%d"%y
-        mbit_s=float(y)*8.0/300.0e6
-        #if mbit_s>600.0: print to_datetime(t),mbit_s
+        mbit_s=float(y)*8.0/(delta*1e6)
+        # if mbit_s>600.0: print(i, " ", t, " ", mbit_s)
         if mbit_s>10000.0: mbit_s=0.0
         tot_mbit_s += mbit_s;
-        prev[i]=x
+         prev[i]=x
     mb_l.append(tot_mbit_s)
-    #print(s)
 
 mb_l.sort()
 mb_n=len(mb_l)