Lesson 8.3: Working with External Libraries (like pandas, NumPy)
Introduction:
Python’s external libraries like pandas and NumPy are essential for data analysis, numerical computing, and handling large datasets efficiently. This lesson covers installing, importing, and using these libraries to perform real-world tasks.
1. Installing Libraries:
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Use
pipto install external libraries.
2. NumPy – Numerical Computing:
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NumPy provides fast, efficient operations on arrays.
Example – NumPy Array:
Advantages of NumPy:
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Efficient memory usage
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Vectorized operations
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Mathematical and statistical functions
3. pandas – Data Analysis:
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pandas provides DataFrame and Series for structured data.
Example – pandas DataFrame:
Advantages of pandas:
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Handles tabular data easily
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Supports CSV, Excel, SQL, JSON formats
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Powerful data manipulation functions
4. Practical Tips:
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Use NumPy for numerical computations and pandas for data analysis
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Learn indexing, slicing, and aggregation operations for efficiency
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Combine pandas with CSV/JSON files for real-world applications
Learning Outcome of This Lesson:
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Install and import external Python libraries
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Work with NumPy arrays for numerical operations
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Use pandas DataFrame and Series for data analysis
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Apply these libraries to handle real-world datasets efficiently
