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Expert roadmaps, tutorials, salary guides and interview prep across Data Science, Generative AI, Python, Cloud & Analytics — written by GloryTecks trainers in Hyderabad.
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Pandas Guide: DataFrames, Cleaning and Aggregation
One messy sales export, cleaned and summarised step by step with pandas: reading it with the right types, the values pandas silently turns into missing data, fixing text and number columns, removing duplicates, named aggregations with groupby, pivot tables that can hide gaps, and merges that check themselves.
PySpark Tutorial: DataFrames, Transformations and Actions
A practical PySpark DataFrame tutorial on three million real New York taxi trips: declaring schemas, filtering and deriving columns with when and otherwise, grouped aggregation that exposes a trap in tip data, a join and a window function for top zones per borough, the same logic in Spark SQL, and the actions.