我有一个目录“ ... / dados”,其中有多个子目录,这些子目录的名称是序列号以及一些无用的信息,例如“ 17448_2017_Jul_2017_Oct”,其中的第一个数字是序列号。在每个子目录中,我有四个“ .txt”文件,其行/行具有日期和时间信息,以及某种类型的属性(例如湿度),在每个子目录中的命名方式相同,例如“ 2019-01-29 03:11:26 54.7”。
我想将它们全部连接起来,以生成带有日期索引的数据集。
path = "/.../dados/"
df = pd.DataFrame()
for fld in os.listdir(path):
subfld = path + fld
if os.path.isdir(subfld):
aux = pd.DataFrame()
sn = fld.split('_')[0]
for file in os.listdir(subfld):
filepath = os.path.join(subfld, file)
if os.path.isfile(filepath):
new_col = pd.read_fwf(filepath, colspecs=[(0, 19), (20, -1)], skiprows=8, names=[file.split('_')[2][:-4]], parse_dates=[0], nrows=9999999)
aux = pd.concat([aux, new_col], axis=1, sort=False)
aux['Machine'] = sn
df = df.append(aux)
这是df.head(10)的打印件:
HumTechRoom TempTechRoom TempExamRoom HumExamRoom Machine
2018-03-04 00:45:11 82.6 NaN NaN NaN 22162
2018-03-04 00:45:47 80.0 NaN NaN NaN 22162
2018-03-04 00:45:53 78.0 NaN NaN NaN 22162
2018-03-04 00:46:04 75.9 NaN NaN NaN 22162
2018-03-04 00:46:20 73.7 NaN NaN 51.3 22162
2018-03-04 00:46:58 71.7 NaN NaN NaN 22162
2018-03-04 00:47:40 NaN NaN NaN 53.4 22162
2018-03-04 00:47:41 NaN 14.5 NaN NaN 22162
2018-03-04 00:47:54 74.3 NaN NaN NaN 22162
2018-03-04 00:47:59 76.6 NaN NaN NaN 22162
这是我收到的错误消息:
...
line 31, in <module>
aux = pd.concat([aux, new_col], axis=1, sort=False)
File ".../concat.py", line 226, in concat
return op.get_result()
File ".../concat.py", line 423, in get_result
copy=self.copy)
File ".../internals.py", line 5425, in concatenate_block_managers
return BlockManager(blocks, axes)
File ".../internals.py", line 3282, in __init__
self._verify_integrity()
File ".../internals.py", line 3493, in _verify_integrity
construction_error(tot_items, block.shape[1:], self.axes)
File ".../internals.py", line 4843, in construction_error
passed, implied))
ValueError: Shape of passed values is (2, 19687), indices imply (2, 19685)
答案 0 :(得分:1)
您的数据框形状不兼容:
ValueError: Shape of passed values is (2, 19687), indices imply (2, 19685)
换句话说,问题是19687!=19685。无论您遇到什么答案,都会从数据的细节中得出,鉴于数据的大小,要共享它可能不切实际。您至少需要在某处添加或删除2行。您需要调查以确定什么地方。
答案 1 :(得分:1)
似乎您在错误的轴上使用了pd.concat
。从axis=1
行中删除pd.concat..
,因为axis=0
是默认设置,可以在docs
为了您的方便。要获得更整洁的数据框,请同时使用ignore_index=True
:
aux = pd.concat([aux, new_col], ignore_index=True, sort=False)
哪个会返回重置索引。