• • 此问题在此处已有答案**：

What exactly is current working directory?（5个答案）
昨天关门了。
代码：

import pandas as pd
file_path='./read_csv_sample.csv'

df1=pd.read_csv(file_path)
print(df1)
df2=pd.read_csv(file_path,header=None)
print(df2)
df3=pd.read_csv(file_path,index_col=None)
print(df3)
df4=pd.read_csv(file_path,index_col='c0')
print(df4)

错误：

---------------------------------------------------------------------------
FileNotFoundError                         Traceback (most recent call last)
<ipython-input-11-4a42e39c37ec> in <module>
      2 file_path='./read_csv_sample.csv'
      3 
----> 4 df1=pd.read_csv(file_path)
      5 print(df1)
      6 df2=pd.read_csv(file_path,head=None)

7 frames
/usr/local/lib/python3.8/dist-packages/pandas/io/common.py in get_handle(path_or_buf, mode, encoding, compression, memory_map, is_text, errors, storage_options)
    700         if ioargs.encoding and "b" not in ioargs.mode:
    701             # Encoding
--> 702             handle = open(
    703                 handle,
    704                 ioargs.mode,

FileNotFoundError: [Errno 2] No such file or directory: './read_csv_sample.csv'

我已经下载了read_csv_sample. csv文件在壁纸（桌面），但它不工作的第2和第4行。