optimized hasproperty(o::Py, attr) = pyhasattr(o, attr)

[stevengj]

Currently, hasproperty(o, attr) works by falling back to Julia's default method, which checks attr in propertynames(o). This is functional but rather inefficient because it first constructs the propertynames list.

Since you already have an optimized pyhasattr method, it seems like you should just define:

hasproperty(o::Py, attr::Symbol) = hasproperty(o, String(attr))
hasproperty(o::Py, attr::AbstractString) = pyhasattr(o, attr)

[cjdoris]

Good idea, this is more consistent with getproperty and setproperty. Done.