Pandas object type cannot be represented as a node feature

[nevzatseferoglu]

Describe the bug

I created a DataFrame which has a series that is object type. I cannot use the row of this object type as a feature of single node. I'm initiating stellar graph with following code by using my custom dataset that i attached as a screenshot below.

square_node_data = pd.DataFrame(
    {'of': nf_obj, 'nf': nf_num}, index=from_node_ids
)
square_node_features = StellarGraph(square_node_data, square_edges)

Stellar graph initialization gives an error as:

ValueError: could not convert string to float: 'object_feature_A'

It seems that there is no support for the feature as numpy object type. I want to ensure it because I couldn't find the answer in the documentation. Maybe there is an another way of giving that feature type 🤔