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Top Questions People Ask About Pandas, NumPy, Matplotlib & Scikit-learn — Answered!

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 Whether you're a beginner or brushing up on your skills, these are the real-world questions Python learners ask most about key libraries in data science. Let’s dive in! 🐍 🐼 Pandas: Data Manipulation Made Easy 1. How do I handle missing data in a DataFrame? df.fillna( 0 ) # Replace NaNs with 0 df.dropna() # Remove rows with NaNs df.isna(). sum () # Count missing values per column 2. How can I merge or join two DataFrames? pd.merge(df1, df2, on= 'id' , how= 'inner' ) # inner, left, right, outer 3. What is the difference between loc[] and iloc[] ? loc[] uses labels (e.g., column names) iloc[] uses integer positions df.loc[ 0 , 'name' ] # label-based df.iloc[ 0 , 1 ] # index-based 4. How do I group data and perform aggregation? df.groupby( 'category' )[ 'sales' ]. sum () 5. How can I convert a column to datetime format? df[ 'date' ] = pd.to_datetime(df[ 'date' ]) ...
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5 Key Services on AWS Cloud computing

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Amazon web services offers 5 services on its cloud computing.

aws services

Top AWS Services

Store Files

Store Files:  AWS provides highly scalable, reliable, secure, fast storage for your digital files.
 Host a Website: AWS provides many ways to host your website in order to suit the needs of large-scale enterprises,startups, and individuals.

Database

Run a Database: Adds or removes virtual servers to handle peaks and lulls in traffic. Requires CloudWatch.Distributes traffic among multiple virtual servers.

Deployment

Deploy an Application:  AWS offers application management services that help you build, deploy, and scale applications.You can use an application management service to leverage other AWS services without having to manage each of them separately and manually.

Net Work

Create a Network: You can create virtual private clouds on AWS. These can be isolated from the Internet, or you can add a public-facing subnet that makes part of your network accessible from the Internet.

You can also create a hardware virtual private network (VPN) connection between your network and AWS in order to create a hybrid solution in which part of your IT infrastructure runs in your physical data center and part of it runs in your virtual private cloud on AWS 

Manage My AWS Resources: AWS provides several services that help you monitor, manage, and configure your AWS account and resources.

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