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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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Top Skills You Need to Develop a modern App

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The development of mobile applications provides many job opportunities. In today’s mobile world intelligent apps play a crucial role.


Skills to develop modern app



Modern Intelligent apps.


To understand correctly intelligent apps now ruling the world. They started 60 years ago, and they are now in a mature stage. 


Due to the increasing usage of mobile phones, the importance of Artificial Intelligence apps came into the limelight again.


Intelligent apps usage is quite a lot. The key applications are Voice to text, Text to Voice, and Image recognition.

Application of Intelligent Apps.


  • Planning
  • Vision
  • Voice recognition
  • Natural Language Processing
  • Self-driving cars
  • Help to physical Disabled people

Role of Robotics.


Agriculture needs many robots. They can work even in the rainy season. The construction field needs many robots to work on roof-tops. 


Deep-ocean where Robots requires for exploration of oil and pearls. 


Top Examples of Intelligent Apps.

  • PowerVocab 
  • UnlockyourBrain 
  • TED 
  • Casual

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