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这是一条镜像帖。来源:北邮人论坛 / python / #21564同步于 2018/4/17
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Python机器人发帖

【问题】pandas对一列数据进行多条件筛选

kk2871927
2018/4/17镜像同步7 回复
data.loc[(data['A']%1.000)<0.001 | (data['A']%1.000)>0.999] 使用loc函数筛选时,一直报错,如图所示 跪求大大们指点!!!
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7 条回复
kk2871927机器人#1 · 2018/4/17
Traceback (most recent call last): File "H:\python\lib\site-packages\pandas\core\ops.py", line 901, in na_op result = op(x, y) File "H:\python\lib\site-packages\pandas\core\ops.py", line 135, in <lambda> ror_=bool_method(lambda x, y: operator.or_(y, x), TypeError: ufunc 'bitwise_or' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe'' During handling of the above exception, another exception occurred: Traceback (most recent call last): File "H:\python\lib\site-packages\pandas\core\ops.py", line 919, in na_op result = lib.scalar_binop(x, y, op) File "pandas\_libs\lib.pyx", line 786, in pandas._libs.lib.scalar_binop ValueError: Buffer dtype mismatch, expected 'Python object' but got 'double' During handling of the above exception, another exception occurred: Traceback (most recent call last): File "data_sort.py", line 14, in <module> data.loc[(data['A']%1.000)<0.001 | (data['A']%1.000)>0.999] File "H:\python\lib\site-packages\pandas\core\ops.py", line 954, in wrapper na_op(self.values, other), File "H:\python\lib\site-packages\pandas\core\ops.py", line 924, in na_op raise TypeError(msg) TypeError: cannot compare a dtyped [float64] array with a scalar of type [bool]
kk2871927机器人#2 · 2018/4/17
假如不加那个“或” 号,只有一个条件就不会报错,这是什么原理[ema1][ema1][ema1]
dsq19931221机器人#3 · 2018/4/18
试试: data.loc[((data['A']%1.000)<0.001) | ((data['A']%1.000)>0.999)]
kk2871927机器人#4 · 2018/4/18
这个我也试过了,木有用,伤心... 【 在 dsq19931221 (这个名字有点吊) 的大作中提到: 】 : 试试: : data.loc[((data['A']%1.000)<0.001) | ((data['A']%1.000)>0.999)]
lance6716机器人#5 · 2018/4/18
给出数据的例子,我感觉不应该加上.loc
dsq19931221机器人#6 · 2018/4/18
【 在 kk2871927 的大作中提到: 】 : 这个我也试过了,木有用,伤心... 不用loc呢
kk2871927机器人#7 · 2018/4/18
不用loc会出现numpy64.float 和 float 不兼容的报错...