Skip to main content
St Louis

Back to all posts

How to Drop Nan Values But Not Columns In Pandas?

Published on
3 min read
How to Drop Nan Values But Not Columns In Pandas? image

Best Data Cleaning Tools to Buy in March 2026

1 Cleaner Kit for AirPod, Multi-Tool iPhone Cleaning Kit, Cell Phone Cleaning Repair & Recovery iPhone and iPad (Type C) Charging Port, Lightning Cables, and Connectors, Easy to Store and Carry Design

Cleaner Kit for AirPod, Multi-Tool iPhone Cleaning Kit, Cell Phone Cleaning Repair & Recovery iPhone and iPad (Type C) Charging Port, Lightning Cables, and Connectors, Easy to Store and Carry Design

  • CLEAN & REPAIR PORTS: RESTORE YOUR DEVICES FOR RELIABLE CHARGING.

  • PORTABLE DESIGN: LIGHTWEIGHT KIT FOR ON-THE-GO CLEANING CONVENIENCE.

  • 24/7 SUPPORT: COUNT ON US FOR QUICK SOLUTIONS AND EXCELLENT SERVICE.

BUY & SAVE
$15.99 $19.99
Save 20%
Cleaner Kit for AirPod, Multi-Tool iPhone Cleaning Kit, Cell Phone Cleaning Repair & Recovery iPhone and iPad (Type C) Charging Port, Lightning Cables, and Connectors, Easy to Store and Carry Design
2 Cleaning Data for Effective Data Science: Doing the other 80% of the work with Python, R, and command-line tools

Cleaning Data for Effective Data Science: Doing the other 80% of the work with Python, R, and command-line tools

BUY & SAVE
$26.49 $43.99
Save 40%
Cleaning Data for Effective Data Science: Doing the other 80% of the work with Python, R, and command-line tools
3 AstroAI Windshield Cleaner Tool, Car Interior Window Detailing Cleaning Kit with Extendable Handle and 4 Easy-to-Install Reusable Microfiber Pads, Auto Glass Wiper Brush Kit for Car&Home, Blue, 21in

AstroAI Windshield Cleaner Tool, Car Interior Window Detailing Cleaning Kit with Extendable Handle and 4 Easy-to-Install Reusable Microfiber Pads, Auto Glass Wiper Brush Kit for Car&Home, Blue, 21in

  • ALL-IN-ONE CONVENIENCE: COMPLETE KIT WITH EXTRA PADS AND STORAGE BAG.
  • SUPERIOR CLEANING POWER: UPGRADED MICROFIBER PADS ABSORB STAINS EFFORTLESSLY.
  • VERSATILE USE: IDEAL FOR CARS, SUVS, AND HARD-TO-REACH HOUSEHOLD WINDOWS.
BUY & SAVE
$16.99 $22.99
Save 26%
AstroAI Windshield Cleaner Tool, Car Interior Window Detailing Cleaning Kit with Extendable Handle and 4 Easy-to-Install Reusable Microfiber Pads, Auto Glass Wiper Brush Kit for Car&Home, Blue, 21in
4 PurePort USB-C Multi-Tool Phone Cleaning Kit | Clean Repair & Restore Cell Phone Tablet & Laptop USB C Ports & Cables | Fix Unreliable & Bad Connections | Extend The Life of Your Tech Devices (Black)

PurePort USB-C Multi-Tool Phone Cleaning Kit | Clean Repair & Restore Cell Phone Tablet & Laptop USB C Ports & Cables | Fix Unreliable & Bad Connections | Extend The Life of Your Tech Devices (Black)

  • SAVE HUNDREDS BY REPAIRING CONNECTIVITY ISSUES WITH PUREPORT!
  • EXTEND YOUR DEVICE'S LIFE WITH SAFE, EFFECTIVE CLEANING SOLUTIONS.
  • REVIVE CHARGING PORTS AND CABLES FOR RELIABLE CONNECTIONS EVERY TIME.
BUY & SAVE
$24.99
PurePort USB-C Multi-Tool Phone Cleaning Kit | Clean Repair & Restore Cell Phone Tablet & Laptop USB C Ports & Cables | Fix Unreliable & Bad Connections | Extend The Life of Your Tech Devices (Black)
5 Ordilend for iPhone Cleaning Kit for Charging Port Cleaner, Cleaner Kit for AirPod Multi-Tool iPhone Cleaner Repair Lightning Cable for iPad Connector Airpod Speaker Compact Portable with Storage Case

Ordilend for iPhone Cleaning Kit for Charging Port Cleaner, Cleaner Kit for AirPod Multi-Tool iPhone Cleaner Repair Lightning Cable for iPad Connector Airpod Speaker Compact Portable with Storage Case

  • REVIVE CONNECTIONS: RESTORE CHARGING EFFICIENCY WITH EFFECTIVE CLEANING.

  • COMPREHENSIVE KIT: CLEAN PORTS, SPEAKERS, AND EARBUDS WITH PRECISION TOOLS.

  • SAFE & PORTABLE: USE ANYWHERE WITHOUT DAMAGING DEVICES; COMPACT DESIGN!

BUY & SAVE
$15.99 $19.99
Save 20%
Ordilend for iPhone Cleaning Kit for Charging Port Cleaner, Cleaner Kit for AirPod Multi-Tool iPhone Cleaner Repair Lightning Cable for iPad Connector Airpod Speaker Compact Portable with Storage Case
6 Keyboard Cleaning Kit Laptop Cleaner, All-in-1 Computer Screen Cleaning Brush Tool, Multi-Function PC Accessories Electronic Cleaner Kit Spray for iPhone iPad Macbook Earbud Camera Monitor with Patent

Keyboard Cleaning Kit Laptop Cleaner, All-in-1 Computer Screen Cleaning Brush Tool, Multi-Function PC Accessories Electronic Cleaner Kit Spray for iPhone iPad Macbook Earbud Camera Monitor with Patent

  • COMPREHENSIVE KIT: INCLUDES BRUSHES, CLOTHS, AND KEYCAP PULLER.
  • PROFESSIONAL PERFORMANCE: DEEP CLEANS LAPTOPS AND KEYBOARDS EFFORTLESSLY.
  • PORTABLE DESIGN: EASY TO CARRY FOR ON-THE-GO CLEANING NEEDS.
BUY & SAVE
$14.99 $19.98
Save 25%
Keyboard Cleaning Kit Laptop Cleaner, All-in-1 Computer Screen Cleaning Brush Tool, Multi-Function PC Accessories Electronic Cleaner Kit Spray for iPhone iPad Macbook Earbud Camera Monitor with Patent
7 STREBITO Spudger Pry Tool Kit 12 Piece Opening Tool, Metal & Plastic Spudger Tool Kit, Prying Cleaning & Open Tool for iPhone, Laptop, iPad, Cell Phone, MacBook, Tablet, Computer, PS4, Electronics

STREBITO Spudger Pry Tool Kit 12 Piece Opening Tool, Metal & Plastic Spudger Tool Kit, Prying Cleaning & Open Tool for iPhone, Laptop, iPad, Cell Phone, MacBook, Tablet, Computer, PS4, Electronics

  • VERSATILE TOOLS FOR ALL DEVICES: PERFECT FOR IPHONES, LAPTOPS, TABLETS, AND MORE!

  • DURABLE, SCRATCH-FREE DESIGN: MADE FROM TOUGH CARBON FIBER PLASTIC FOR SAFE USE.

  • COMPREHENSIVE KIT WITH LIFETIME WARRANTY: INCLUDES EVERYTHING YOU NEED, PLUS PEACE OF MIND!

BUY & SAVE
$7.49
STREBITO Spudger Pry Tool Kit 12 Piece Opening Tool, Metal & Plastic Spudger Tool Kit, Prying Cleaning & Open Tool for iPhone, Laptop, iPad, Cell Phone, MacBook, Tablet, Computer, PS4, Electronics
+
ONE MORE?

To drop NaN values but not columns in pandas, you can use the dropna() method with the axis parameter set to 0. This will drop rows that contain any NaN values while keeping all columns intact. You can also use the [subset](https://ubuntuask.com/blog/how-to-subset-a-teradata-table-in-python) parameter to specify specific columns to check for NaN values before dropping rows. Additionally, you can use the thresh parameter to set a threshold for the number of non-NaN values a row must have in order to be kept. This allows you to drop rows that have too many NaN values without dropping entire columns.

How to fill missing values in a pandas DataFrame?

There are several ways to fill missing values in a pandas DataFrame. Some common methods include:

  1. Using the fillna() method: The fillna() method allows you to fill missing values with a specific value or using a method like ffill for forward fill or bfill for backward fill.

df.fillna(0) # fill missing values with 0 df.fillna(method='ffill') # fill missing values with the previous non-missing value df.fillna(method='bfill') # fill missing values with the next non-missing value

  1. Using the interpolate() method: The interpolate() method will interpolate missing values based on the values before and after the missing values.

df.interpolate() # interpolate missing values

  1. Using the replace() method: The replace() method allows you to replace specific values in the DataFrame with another value.

df.replace(-999, np.nan) # replace -999 with NaN

  1. Using the dropna() method: If you prefer to simply drop rows with missing values, you can use the dropna() method.

df.dropna() # drop rows with missing values

These are just a few examples of how you can fill missing values in a pandas DataFrame. The best method to use will depend on your specific data and requirements.

How to drop rows with NaN values while keeping a copy of the original DataFrame in pandas?

You can achieve this by creating a copy of the original DataFrame before dropping the rows with NaN values. Here is an example:

import pandas as pd

Creating a sample DataFrame with NaN values

data = {'A': [1, 2, None, 4, 5], 'B': ['foo', 'bar', 'baz', None, 'qux']} df = pd.DataFrame(data)

Creating a copy of the original DataFrame

df_copy = df.copy()

Dropping rows with NaN values from the original DataFrame

df.dropna(inplace=True)

Print the original DataFrame and the copy after dropping NaN values

print("Original DataFrame:") print(df_copy) print("\nDataFrame after dropping NaN values:") print(df)

In this example, the original DataFrame df_copy is created as a copy of the original DataFrame df. The dropna() method is then used to drop rows with NaN values from the original DataFrame df, while the original DataFrame df_copy remains unchanged.

How to drop rows with NaN values in a specific column in pandas?

You can drop rows with NaN values in a specific column in pandas using the dropna() method. You can specify the column using the subset parameter. Here's an example:

import pandas as pd

Create a sample DataFrame

data = {'A': [1, 2, 3, 4], 'B': [5, 6, None, 8], 'C': [9, 10, 11, 12]} df = pd.DataFrame(data)

Drop rows with NaN values in column 'B'

df = df.dropna(subset=['B'])

print(df)

In this example, rows with NaN values in column 'B' will be dropped from the DataFrame.