BUG: AttributeError: 'TextFileReader' object has no attribute 'f'

[theinexorable]

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Reproducible Example

import pandas as pd
file = 'random.csv'
chunks = pd.read_csv(file, chunksize=n)
name = chunks.f.rsplit('.', 1)[0]

Issue Description

TextFileReader object no more has .f attribute, containing the name of the given file.
I can't find in the changelog of 1.4.1 this deprecation.

Expected Behavior

.f or other attribute to keep the file name. Helpful to implement in a function to create multiple same-name export files.

Installed Versions

INSTALLED VERSIONS

commit : 06d2301
python : 3.9.7.final.0
python-bits : 64
OS : Windows
OS-release : 10
Version : 10.0.19044
machine : AMD64
processor : AMD64 Family 23 Model 1 Stepping 1, AuthenticAMD
byteorder : little
LC_ALL : None
LANG : en
LOCALE : Bulgarian_Bulgaria.1251

pandas : 1.4.1
numpy : 1.20.3
pytz : 2021.3
dateutil : 2.8.2
pip : 21.2.4
setuptools : 58.0.4
Cython : 0.29.25
pytest : 6.2.5
hypothesis : None
sphinx : 4.4.0
blosc : None
feather : None
xlsxwriter : 3.0.2
lxml.etree : 4.7.1
html5lib : 1.1
pymysql : None
psycopg2 : None
jinja2 : 2.11.3
IPython : 7.31.1
pandas_datareader: None
bs4 : 4.10.0
bottleneck : 1.3.2
fastparquet : None
fsspec : 2022.01.0
gcsfs : None
matplotlib : 3.5.1
numba : 0.54.1
numexpr : 2.8.1
odfpy : None
openpyxl : 3.0.9
pandas_gbq : None
pyarrow : 4.0.1
pyreadstat : None
pyxlsb : None
s3fs : None
scipy : 1.7.3
sqlalchemy : 1.4.27
tables : 3.6.1
tabulate : None
xarray : None
xlrd : 2.0.1
xlwt : 1.3.0
zstandard : None

[theinexorable]

so i found out it was in https://github.com/pandas-dev/pandas/blob/v1.3.5/pandas/io/parsers/readers.py
line 774 within class TextFileReader(abc.Iterator):
self.f = f
question is why remove and can I get the name out of some other attribute?

[twoertwein]

Was f ever documented to be public? If not, it was (meant) to be private.

Also, f does not need to be a string, it can be a file-like object.

[phofl]

I don‘t know if TextFileReader is documented at all

[twoertwein]

At the very least, we should have a doc-page about TextFileReader that says that only __next__, __enter__, and __exit__ are supposed to be used (for-loop and context manager). Maybe also add more methods/attributes if there are common use-cases.