I would like to print out the name of a variable that is supplied when a function is used in Python.

The goal is to use the supplied name in some printed text.

There are multiple questions dealing with similar topics, but I am unable to find an exact solution or approach.

I am running Python 3 on Windows.

(Python version: 3.12.3 (tags/v3.12.3:f6650f9, Apr 9 2024, 14:05:25) [MSC v.1938 64 bit (AMD64)]

Previous questions and answers:

How to get literal value

How to print original variables name

Print a name and value

Getting the name as a string

Example:

import pandas as pd

data_ok = {'col_a':[1,1,1,1],
           'col_b':[2,2,2,2],
           'col_c':[3,3,3,3]}


data_no = {'col_a':[1,1,1,1],
           'col_b':[2,2,2,2],
           'col_d':[4,4,4,4]}

df_ok = pd.DataFrame(data_ok)
df_no = pd.DataFrame(data_no)


print(df_ok)
print(df_no)


def df_check(df_in):
    need_cols = ['col_a', 'col_b', 'col_c']
    have_cols = df_in.columns.tolist()
    check_cols = all(e in have_cols for e in need_cols)
    assert check_cols == True, f"---------- Import Error - Check dataframe {df_in} columns in file.  The columns must include : {need_cols} ----------"
    if check_cols == True:
        print("nn", "-"*80, '(required columns found!' , need_cols)
        print("nn", "-" * 80, '(continuing with analysis)' )



df_check(df_ok)
df_check(df_no)

 -------------------------------------------------------------------------------- (required columns found! ['col_a', 'col_b', 'col_c'] )
 -------------------------------------------------------------------------------- (continuing with analysis)

#...

    assert check_cols == True, f"---------- Import Error - Check dataframe {df_in} columns in file.  The columns must include : {need_cols} ----------"
       ^^^^^^^^^^^^^^^^^^
AssertionError: ---------- Import Error - Check dataframe    col_a  col_b  col_d
0      1      2      4
1      1      2      4
2      1      2      4
3      1      2      4 columns in file.  The columns must include : ['col_a', 'col_b', 'col_c'] ----------

Goal:

Is there a way to have the printed message report the name of the provided dataframe as opposed to printing the data frame itself?

AssertionError: ---------- Import Error - Check dataframe "df_no" columns in file.  The columns must include : ['col_a', 'col_b', 'col_c'] ----------