Data commit

Task/Nautical-bell/Python/nautical-bell.py

@@ -0,0 +1,63 @@
+import time, calendar, sched, winsound
+
+duration = 750      # Bell duration in ms
+freq = 1280         # Bell frequency in hertz
+bellchar = "\u2407"
+watches = 'Middle,Morning,Forenoon,Afternoon,First/Last dog,First'.split(',')
+
+def gap(n=1):
+    time.sleep(n * duration / 1000)
+off = gap
+
+def on(n=1):
+    winsound.Beep(freq, n * duration)
+
+def bong():
+    on(); off(0.5)
+
+def bongs(m):
+    for i in range(m):
+        print(bellchar, end=' ')
+        bong()
+        if i % 2:
+            print('  ', end='')
+            off(0.5)
+    print('')
+
+scheds =  sched.scheduler(time.time, time.sleep)
+
+def ships_bell(now=None):
+    def adjust_to_half_hour(atime):
+        atime[4] = (atime[4] // 30) * 30
+        atime[5] = 0
+        return atime
+
+    debug = now is not None
+    rightnow = time.gmtime()
+    if not debug:
+        now = adjust_to_half_hour( list(rightnow) )
+    then = now[::]
+    then[4] += 30
+    hr, mn = now[3:5]
+    watch, b = divmod(int(2 * hr + mn // 30 - 1), 8)
+    b += 1
+    bells = '%i bell%s' % (b, 's' if b > 1 else ' ')
+    if debug:
+        print("%02i:%02i, %-20s %s" % (now[3], now[4], watches[watch] + ' watch', bells), end=' ')
+    else:
+        print("%02i:%02i, %-20s %s" % (rightnow[3], rightnow[4], watches[watch] + ' watch', bells), end=' ')
+    bongs(b)
+    if not debug:
+        scheds.enterabs(calendar.timegm(then), 0, ships_bell)
+        #print(time.struct_time(then))
+        scheds.run()
+
+def dbg_tester():
+    for h in range(24):
+        for m in (0, 30):
+            if (h,m) == (24,30): break
+            ships_bell( [2013, 3, 2, h, m, 15, 5, 61, 0] )
+
+
+if __name__ == '__main__':
+    ships_bell()