Asked By – Roman
I have constructed a condition that extract exactly one row from my data frame:
d2 = df[(df['l_ext']==l_ext) & (df['item']==item) & (df['wn']==wn) & (df['wd']==1)]
Now I would like to take a value from a particular column:
val = d2['col_name']
But as a result I get a data frame that contains one row and one column (i.e. one cell). It is not what I need. I need one value (one float number). How can I do it in pandas?
Now we will see solution for issue: How to get a value from a cell of a dataframe?
If you have a DataFrame with only one row, then access the first (only) row as a Series using
iloc, and then the value using the column name:
In : sub_df Out: A B 2 -0.133653 -0.030854 In : sub_df.iloc Out: A -0.133653 B -0.030854 Name: 2, dtype: float64 In : sub_df.iloc['A'] Out: -0.13365288513107493