remove Single type, rework get stream

t.py

@@ -1,7 +1,7 @@
 import time
 import math
 import numpy as np
-from sehistory.seinflux import SEHistory
+from sehistory.seinflux import SEHistory, fmtime
 from influx import RegExp
 
 DAY = 24 * 3600
@@ -16,7 +16,6 @@ crv([start], [stop], [mod.par], ['float'], [interval=...,] [add_prev=False,] [ad
 """)
 
 now = int(time.time())
-offset = (now // 3600) * 3600
 result = {}
 maxcurves = 7
 maxpoints = 7
@@ -38,7 +37,7 @@ def prt():
                 print('...')
             else:
                 for row in crv:
-                    print(round(row[0] - offset, db.timedig), row[1:])
+                    print(fmtime(row[0]), row[1:])
 
 
 def qry(*args, **kwds):
@@ -97,9 +96,9 @@ def sry(prectime=False):
     for end, start, _, device, stream, pset in sorted(summary):
         if prectime:
             res = db.query(start, end, device=device, stream=stream, single=-1)
-            first = int(min(t[0] for t in res.values()))
+            first = int(min(t[0][0] for t in res.values()))
             res = db.query(start, end, device=device, stream=stream, single=1)
-            last = math.ceil(max(t[0] for t in res.values()))
+            last = math.ceil(max(t[0][0] for t in res.values()))
             tm1 = time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(first))
             tm2 = time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(last))
         else: