0         1         2       date
153  0.280575  0.810817  0.534509 2000-06-02
154  0.490319  0.873906  0.465698 2000-06-03
155  0.070790  0.898340  0.390777 2000-06-04
156  0.896007  0.824134  0.134484 2000-06-05
157  0.539633  0.814883  0.976257 2000-06-06
158  0.772454  0.420732  0.499719 2000-06-07
159  0.498020  0.495946  0.546043 2000-06-08
160  0.562385  0.460190  0.480170 2000-06-09
161  0.924412  0.611929  0.459360 2000-06-10

df[df[0] > 0.7] = 0
mask = (df['date'] > '2000-6-1') & (df['date'] <= '2000-6-10')
print(df.loc[mask])

TypeError: '>' not supported between instances of 'int' and 'str'