71. What is the primary purpose of the "pivot_table" function in Pandas when aggregating data?
72. In Python, which library is commonly used for geospatial data analysis and mapping, especially in geographic information systems (GIS)?
73. Which Python library is often used for anomaly detection and outlier analysis in time series data?
74. What is the primary purpose of the "unstack" method in Pandas when working with hierarchical index data?
75. In Python, which library is commonly used for working with data stored in the Apache Parquet file format?
76. In Pandas, which method is used to calculate the variance of a numerical column in a DataFrame?
77. Which Python library is commonly used for creating interactive 3D visualizations and plots?
78. What is the primary purpose of the "explode" function in Pandas when working with nested data in a DataFrame?
79. In Python, which library provides tools for working with time series data, including time-based indexing and resampling?
80. Which Python library is commonly used for distributed data processing and parallel computing, especially for big data analysis?
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