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How to Check Column Nulls and Replace: Pandas

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Here is a post that shows how to count Nulls and replace them with the value you want in the Pandas Dataframe. We have explained the process in two steps - Counting and Replacing the Null values. Count null values (column-wise) in Pandas ## count null values column-wise null_counts = df.isnull(). sum() print(null_counts) ``` Output: ``` Column1    1 Column2    1 Column3    5 dtype: int64 ``` In the above code, we first create a sample Pandas DataFrame `df` with some null values. Then, we use the `isnull()` function to create a DataFrame of the same shape as `df`, where each element is a boolean value indicating whether that element is null or not. Finally, we use the `sum()` function to count the number of null values in each column of the resulting DataFrame. The output shows the count of null values column-wise. to count null values column-wise: ``` df.isnull().sum() ``` ##Code snippet to count null values row-wise: ``` df.isnull().sum(axis=1) ``` In the above code, `df` is the Panda
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3 Best Ways to Learn AWS on Weekends

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Amazon web services are one of the popular skills. So, many developers started adding this skill to their list. Due to digital transformation, companies started giving more weightage to the developers who have AWS skills.

How to Learn AWS

I want to share in this post how to learn AWS quickly.  The idea is to use your weekends to learn AWS.  My learning plan to allocate 5 hours a week. You can take out 2 hours  Saturday and 3 hours Sunday time for this learning.


how to start learning aws for beginners
3 Best Ways to Learn AWS on Weekends


 As I said in my previous post basic interview questions on Amazon web services really a quick start.


3 Best Ways to Learn AWS During Weekends.

What is next how to start learning and be industry-ready. You need to have a good laptop to begin your learning. If it is Ubuntu pre-installed one, really this is good for your study and practices...


What materials online you need to refer to. This is basically a question for the developer. Just begin with AWS manuals published by AWS-Amazon web services.


1. AWS manuals or materials.

These you can refer are as follows


Then, manuals are looked heavy with details. This is a little complex to understand as a beginner.


What next...


2. Read books.

Yes, reading AWS books and DevOps really a basic start to gain knowledge.


I am sure the below list of books useful for AWS learners.

The next best option is... 

3. Amazon web services Online.

You can save your time with the online courses.  All the commands you can learn quickly.  They also help you with what to read next.


Our recommended and best selling video courses on amazon web services are as follows.


The list may be short but these are value courses...

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