Check if the file is tab-separated (TSV) or comma-separated (CSV).
Often used to filter a "white British" subset or a specific cohort of ~406,000 participants. 406K.txt
import pandas as pd # Load the first 1000 rows to test df_preview = pd.read_csv('406K.txt', sep='\t', nrows=1000) print(df_preview.columns) # Load the full file if memory allows df = pd.read_csv('406K.txt', sep='\t') Use code with caution. Copied to clipboard 3. Cleaning the Data df.isnull().sum() Remove Duplicates: df.drop_duplicates() Check if the file is tab-separated (TSV) or