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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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Skills Need Every Employee By 2020

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With all the predictions about the future of work, we are constantly painting a picture of how the future workplace will look. But, what most of us should focus on is what the workforce will need to look like – meaning, what skills employees need to have to ensure continued success into the next decade?
The Top 10 Online Colleges website has the answer. They’ve done the research and compiled a list of skills that all employees will need by 2020 (which is only six years away!) and the drivers of the new skill set.
First, we must understand what is driving change and molding the future of work.
The six key drivers of change include:
  1. Extreme longevity: People are living longer.
  2. The rise of smart machines and systems: Tech will augment and extend our own capabilities.
  3. Computational world: There will be an increase in sensors and processing that will make the world a programmable system.
  4. New media ecology: There will be new communication tools that will require media literacies beyond text.
  5. Superstructured organizations: Social technologies will drive new forms of production and value creation.
  6. Globally connected world: Diversity and adaptability will be at the center of operations.

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