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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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3 top IT Skills every new IT Professionals learn to progress in software career

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it skills
What are the skills needed by the new IT professionals or job seekers who help the organisation transition to IT-as-a-Service. In order to lead their organisations to the cloud, IT professionals must focus on three fundamental areas:

Core Virtualisation Skill Sets

IT professionals must think and operate in the virtual world. No longer can they be tied to the old paradigm of physical assets dedicated to specific users or applications.

They must think in terms of “services” riding on top of a fully virtualized infrastructure, and how applications will take advantage of shared resources with both servers and storage.

This requires comprehensive skills in both server and storage virtualization technology, and enough experience as a practitioner to understand the intricacies and critical elements of managing virtual platforms.

Rules of Old IT and New IT

it skills

Cross-training Competency

Leaders of IT innovation cannot be completely siloed and hyper-focused. Although there will still be a need for deep domain expertise, the architects who lead the transition must have broad skills.

They must understand enough about security, networking, storage, servers, databases, and applications to develop a vision and look at infrastructure holistically. 

As infrastructure is deployed and managed, these lead architects will then consult with, and rely on domain experts. To broaden their skills, it will be necessary for IT professionals to invest time in acquiring skills in fields adjacent to their own.

Business Skills

IT professionals will take on the role of business advisors and, in some ways, “brokers” of services. 

 They must collaborate with line-of-business and application owners, guiding the discussion to answer the questions “Where should this workload run?” “Cloud or dedicated?” “Public? Private? Hybrid?” 

 The new architect will be part technologist, part product manager, and part salesperson, helping assess needs and guiding end-users to the appropriate technology solution for a set of business requirements. 

Communication Skills

The requirements include not only communication and customer service skills, but also business analytics and finance, in order to align the right solution to end-user budgets.

 With these skills serving as the foundation for cloud computing leadership, it is more critical than ever that companies hire this talent or invest the time and money to develop it internally. However, organizational changes will be just as critical as evolving the skills within the IT organization.

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