Method to find the domain of a function( ex. log(x)) in sympy

[Gaurav Dhingra]

Hi everyone.

Is there any method using which i can find the domain of a function in sympy ?

Ex. if can get something like this

>> real_domain( log(x), x )

Interval(0, oo, left_open=True)

Or even if there is no such function. Then is there any method i can get whether a particular function is real in an Interval.

For ex.

>>>  IsReal( log(x), Interval(1, 5))

True

It will be helpful for me. Thank you.