move first semester to first semester

I/Karto/lesson6/deg.py

@@ -0,0 +1,12 @@
+from math import pi
+
+def deg(inp):
+    """return angle in radians"""
+    if isinstance(inp, str) and '-' in inp:
+        deg, mm, ss = inp.split('-')
+        ddeg, dmm, dss = float(deg), float(mm), float(ss)
+        deg = ddeg + dmm/60 + dss/3600
+    else:
+        deg = float(instr)
+
+    return deg * pi / 180