short exp() function for get_experiment

t.py

@@ -5,6 +5,7 @@ from sehistory.seinflux import SEHistory, fmtime
 from influx import RegExp
 
 DAY = 24 * 3600
+ETERNITY = 1e10
 
 # token = "zqDbTcMv9UizfdTj15Fx_6vBetkM5mXN56EE9CiDaFsh7O2FFWZ2X4VwAAmdyqZr3HbpIr5ixRju07-oQmxpXw=="
 
@@ -13,6 +14,7 @@ db = SEHistory(access='write')
 print("""
 qry([start], [stop], [interval=...,] [last=True,] [columns=[...],] [<tag>=<value>, ] ...)
 crv([start], [stop], [mod.par], ['float'], [interval=...,] [add_prev=False,] [add_end=True,] [<tag>=<value>, ] ...)
+exp([start], [end], [stream], ...))
 """)
 
 now = int(time.time())
@@ -54,6 +56,16 @@ def crv(*args, **kwds):
     prt()
 
 
+def exp(*args, **kwds):
+    res = db.get_experiments(*args, **kwds)
+    for exp, streams in res.items():
+        print('---',' '.join(exp))
+        for key, periods in streams.items():
+            print(' '.join(','.join(k) for k in key))
+            for period in periods:
+                print('    ', fmtime(period[0]), fmtime(period[1]))
+
+
 def sry(prectime=False):
     interval = 3600
     res = db.query(-DAY * 365, interval=interval, _field='float',