【Python】pandas.DataFrameで複数条件指定時のエラーの対処 - Qiitaimport numpy as np import pandas as pd cols = ['var1', 'var2', 'var3', 'var4'] df = pd.DataFrame(np.random.randn(4, 4), columns=cols) df var1 var2 var3 var4 0 0.597118 -0.853204 1.813645 0.694750 1 -1.118426 0.011119 -2.161933 0.792262 2 0.665828 0.384975 1.676278 -0.487037 3 -0.216118 2.084042 -0.279242 -1.785128 df[df['var1'] >= 0 and df['var2'] <= 0.5] ValueError: The truth value of a Series is
