Importing CSV file into Google Colab using numpy loadtxt

I'm trying to migrate a JupyterLab notebook to Google Colab. In JupyterLab, when I have the notebook file and the associated csv files in the same directory, it is easy to import the data using numpy's loadtxt function as follows:

import numpy as np
filein = "testfile.csv"
data = np.loadtxt(open(filein, "rb"), delimiter=",", skiprows=1)

For various reasons I'd like to continue to use np.loadtxt in Colab. However when I try the same code there, it can't find the csv file despite it residing in the same Google Drive location as the notebook file. I get this error: "FileNotFoundError: [Errno 2] No such file or directory: 'testfile.csv'".

I gather I somehow need to provide a path to the file, but haven't been able to figure out how to do this. Is there any straightforward way to use np.loadtxt?

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