@staticmethod<EOL><INDENT>def from_EV(E, V):<DEDENT>
a = np.square(E) / V<EOL>b = E / V<EOL>return Gamma(a, b)<EOL>
Creates an instance of a Gamma Prior  by specifying the Expected value(s)
and Variance(s) of the distribution.

:param E: expected value
:param V: variance