I have create an empty dataframe as:
df = pd.DataFrame(columns=["steps","amount","token_id"])
Now I want to add index to it. The index is not readily defined, but are going to set by the program in run time. I tried the following:
df.index = ["new1"]
But got error. I want to know how an empty dataframe can be set with the new index.
I want the outcome be like the following:  
         amount steps token_id
new1    NaN      NaN      NaN
Please let me know how is this possible.
