Solution 1:
With pandas
, you can use:
import pandas as pd
df = pd.read_csv(file)
df['VERSION'] = 10
df.to_csv(file, index=False)
Solution 2: If there are multiple rows (and you only want first 3), then you can use:
df.loc[df.index < 3, ['VERSION']] = 10
instead of:
df['VERSION'] = 10
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