mò ÏVFc@sZdkZdkZdkTdefd„ƒYZd„ZedjoeeiŒndS(N(t*tHistcBshtZdZgd„Zd„Zd„Zd„Zd„Zd„Zd„Z e d„Z e d „Z RS( s{a histogram is a dictionary that maps from each key (x) to the number of times the key has appeared (frequency, f) cCs"x|D]}|i|ƒqWdS(s5create a new histogram starting with the items in seqN(tseqtxtselftcount(RRR((t/home/downey/cm/code/Hist.pyt__init__ scCs|i|dƒd||