Constructor: Histogram(data, bins, range=None)
a sequence of data points
the number of bins into which the data is to be sorted
a tuple of two values, specifying the lower and the upper end of the interval spanned by the bins. Any data point outside this interval will be ignored. If no range is given, the smallest and largest data values are used to define the interval.
The number of points in a bin can be obtained by indexing the histogram with the bin number. Application of len() yields the number of bins. A histogram thus behaves like a sequence of numbers.
Methods:Add the values in data (a sequence of numbers) to the originally supplied data. Note that this does not affect the default range of the histogram, which is fixed when the histogram is created.
Scales all counts by the same factor such that their sum is norm.