6 Answered Questions for the topic dataframe


how do I calculate average value of columns of a file in Python?

import pandas as pdmy_file = pd.read_csv("file.tsv", sep="\t")my_file.head()my_file['item_price'].mean()I could easily do this by using Pandas. However how could I do it without using Pandas?... more
Dataframe Python Pandas


Get list from pandas DataFrame column headers?

I want to get a list of the column headers from a pandas DataFrame. The DataFrame will come from user input so I won't know how many columns there will be or what they will be called.For example,... more
Dataframe Python Pandas Replace


Renaming columns in pandas?

I have a DataFrame using pandas and column labels that I need to edit to replace the original column labels. I'd like to change the column names in a DataFrame `A` where the original column names... more


Adding new column to existing DataFrame in Python pandas?

I have the following indexed DataFrame with named columns and rows not- continuous numbers: a b c d 2 0.671399 0.101208 -0.181532 0.241273 3 0.446172... more
Dataframe Python Pandas


Select rows from a DataFrame based on values in a column in pandas?

How to select rows from a DataFrame based on values in some column in pandas? In SQL I would use: select * from table where colume_name = some_value. *I tried to look at pandas documentation... more
Dataframe Python Pandas


Delete column from pandas DataFrame?

When deleting a column in a DataFrame I use: del df['column_name']And this works great. Why can't I use the following? del df.column_name*As you can access the column/Series as... more

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