pandas.read\u csv在循环中给出FileNotFound错误
pandas.read\u csv在循环中给出FileNotFound错误,pandas,python-3.6,Pandas,Python 3.6,pandas.read\u csv作为单个语句使用时工作正常。但是当它在循环中使用时,即使文件存在,也会给出FileNotFoundError for filename in os.listdir("./Datasets/pollution"): print(filename) # To check which file is under processing df = pd.read_csv(filename, sep=",").head(1) 以上几行给出了以下错误 pol
pandas.read\u csv
作为单个语句使用时工作正常。但是当它在循环中使用时,即使文件存在,也会给出FileNotFoundError
for filename in os.listdir("./Datasets/pollution"):
print(filename) # To check which file is under processing
df = pd.read_csv(filename, sep=",").head(1)
以上几行给出了以下错误
pollutionData184866.csv <----- The name of the file is printed properly.
Traceback (most recent call last):
File "/home/parnab/PycharmProjects/FinalYearProject/locationExtractor.py", line 13, in <module>
df = pd.read_csv(i, sep=",").head(1)
File "/usr/lib/python3.6/site-packages/pandas/io/parsers.py", line 646, in parser_f
return _read(filepath_or_buffer, kwds)
File "/usr/lib/python3.6/site-packages/pandas/io/parsers.py", line 389, in _read
parser = TextFileReader(filepath_or_buffer, **kwds)
File "/usr/lib/python3.6/site-packages/pandas/io/parsers.py", line 730, in __init__
self._make_engine(self.engine)
File "/usr/lib/python3.6/site-packages/pandas/io/parsers.py", line 923, in _make_engine
self._engine = CParserWrapper(self.f, **self.options)
File "/usr/lib/python3.6/site-packages/pandas/io/parsers.py", line 1390, in __init__
self._reader = _parser.TextReader(src, **kwds)
File "pandas/parser.pyx", line 373, in pandas.parser.TextReader.__cinit__ (pandas/parser.c:4184)
File "pandas/parser.pyx", line 667, in pandas.parser.TextReader._setup_parser_source (pandas/parser.c:8449)
FileNotFoundError: File b'pollutionData184866.csv' does not exist
它工作得很好
我做错了什么?os.listdir(“./Datasets/pollution”)
返回一个没有路径的文件列表,并且根据路径“/Datasets/pollution”
您正在解析的CSV文件不是来自当前目录”
,因此将其更改为glob.glob(“./Datasets/pollution/*.CSV')
,因为glob.glob()
演示:
如果您尝试glob.glob('./Datasets/pollution/*.csv')
而不是os.listdir(“./Datasets/pollution”)
?@MaxU它正在工作,会发生什么情况。。。那么第一个有什么问题吗?非常感谢。:-。我从终端执行单个命令,它在同一个目录上,这就是它工作的原因。
filename = 'pollutionData184866.csv'
df = pd.read_csv(filename, sep=',')
In [19]: os.listdir('d:/temp/.data/629509')
Out[19]:
['AAON_data.csv',
'AAON_data.png',
'AAPL_data.csv',
'AAPL_data.png',
'AAP_data.csv',
'AAP_data.png']
In [20]: glob.glob('d:/temp/.data/629509/*.csv')
Out[20]:
['d:/temp/.data/629509\\AAON_data.csv',
'd:/temp/.data/629509\\AAPL_data.csv',
'd:/temp/.data/629509\\AAP_data.csv']