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  DataFrame
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Returns a DataFrame with only the specified columns. Useful for pruning columns to a small set before data is displayed. See drop() on how to drop specific columns instead.

df = px.DataFrame('process_stats', select=['upid', 'cpu_ktime_ns', 'rss_bytes'])
# Keep only the upid and rss_bytes columns
df = df[['upid', 'rss_bytes']]