Пост My favorite way to work with multiple filters in pandas.Series — not a chain of .loc, but a single mask. 🐼

My favorite way to work with multiple filters in pandas.Series — not a chain of .loc, but a single mask. 🐼 The chain looks neat, but breaks on real data and easily gives unexpected results: s = pd.Series([10, 15, 20, 25, 30]) s.loc[s > 20].loc[s % 2 == 1] The problem is that the second .loc again looks at the original s, not the already filtered result. The logic gets messy. 🤯 It's more reliable to gather everything into one expression: s = pd.Series([10, 15, 20, 25, 30]) mask = (s > 20) & (s % 2 == 1) result = s.loc[mask] One mask, one point of truth. ✅ It's easier to debug. Fewer surprises when the code grows. 🚀 #Pandas #Python #DataScience #CodingTips #DataEngineering #Debugging