python - 我的错误是由于绝对路径问题造成的吗？

Question

我正在尝试创建一个变量，用于存储我正在工作的目录中名为 TimeSeries 的文件夹。之后，我尝试读取 TimeSeries 中的每个文件。显然，我的错误源于 df = pd.read_csv(f) 是相对路径而不是绝对路径。但是，我无法确认这一点，因为当我检查 isabs(direct) 时，我得到了 True。我确实知道错误与该特定行有关，但我只是不知道它是什么。

代码:

import pandas as pd
import numpy as np
import os

direct = os.path.abspath('TimeSeries')


for f in direct:
    df = pd.read_csv(f)
    df = df.replace(np.nan, 'Other', regex=True)
    if df.columns[0] == ['FIPS']:
        print(df.columns)
        df = df.drop(['FIPS', 'Last_Update', 'Lat', 'Long_'], axis=1)
        df = df.rename(columns={'Admin2': 'County',
                                'Province_State': 'State',
                                'Country_Region': 'Country',
                                'Combined_Key': 'City'})
        df.to_csv(f)
    elif df.columns[0] == ['Province/State']:
        print(df.columns)
        df = df.drop(['Last Update'], axis=1)
        df = df.rename(columns={'Province/State': 'State',
                                'Country/Region': 'Country'})
        df.to_csv(f)
    else:
        pass

结果:

Traceback (most recent call last):
  File "C:/Users/USER/PycharmProjects/Corona Stats/Corona.py", line 9, in <module>
    df = pd.read_csv(f)
  File "C:\Users\USER\AppData\Local\Programs\Python\Python38\lib\site-packages\pandas\io\parsers.py", line 676, in parser_f
    return _read(filepath_or_buffer, kwds)
  File "C:\Users\USER\AppData\Local\Programs\Python\Python38\lib\site-packages\pandas\io\parsers.py", line 448, in _read
    parser = TextFileReader(fp_or_buf, **kwds)
  File "C:\Users\USER\AppData\Local\Programs\Python\Python38\lib\site-packages\pandas\io\parsers.py", line 880, in __init__
    self._make_engine(self.engine)
  File "C:\Users\USER\AppData\Local\Programs\Python\Python38\lib\site-packages\pandas\io\parsers.py", line 1114, in _make_engine
    self._engine = CParserWrapper(self.f, **self.options)
  File "C:\Users\USER\AppData\Local\Programs\Python\Python38\lib\site-packages\pandas\io\parsers.py", line 1891, in __init__
    self._reader = parsers.TextReader(src, **kwds)
  File "pandas\_libs\parsers.pyx", line 374, in pandas._libs.parsers.TextReader.__cinit__
  File "pandas\_libs\parsers.pyx", line 674, in pandas._libs.parsers.TextReader._setup_parser_source
FileNotFoundError: [Errno 2] File C does not exist: 'C'

Process finished with exit code 1

这就是我直接打印时发生的情况。

C:\Users\USER\PycharmProjects\Corona Stats\TimeSeries

Answer 1

IIUC:尝试:

source = "C:/Users/USER/PycharmProjects/Corona Stats/TimeSeries"
for filename in os.listdir(source):
    filepath = os.path.join(source, filename)
    if not os.path.isfile(filepath):
        continue

    df = pd.read_csv(filepath)
    df = df.replace(np.nan, 'Other', regex=True)
    if df.columns[0] == 'FIPS':
        print(df.columns)
        df = df.drop(['FIPS', 'Last_Update', 'Lat', 'Long_'], axis=1)
        df = df.rename(columns={'Admin2': 'County',
                                'Province_State': 'State',
                                'Country_Region': 'Country',
                                'Combined_Key': 'City'})
        df.to_csv(filepath)
    elif df.columns[0] == 'Province/State':
        print(df.columns)
        df = df.drop(['Last Update'], axis=1)
        df = df.rename(columns={'Province/State': 'State',
                                'Country/Region': 'Country'})
        df.to_csv(filepath)