import pandas as pd

df = pd.read_csv('Data_Tracerstudy/Data_2024_Tracer_study.csv', sep=';', encoding='utf-8-sig')

for i in range(26):
    col = df.columns[i]
    unique_vals = df[col].dropna().unique()
    sample_vals = unique_vals[:3] if len(unique_vals) > 0 else ['ALL_NULL']
    print(f"[{i+1}] {col}")
    print(f"    Sample: {sample_vals}")