Python
Explore fundamental Python topics crucial for data science interviews such as differences between tuples and lists, pandas Series versus DataFrame, sorting NumPy arrays, negative indexing, lambda functions, and creating plots using Matplotlib and Seaborn. Understand how to manipulate and convert data efficiently using Python libraries to prepare confidently for technical questions.
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What is a Python tuple, and how does it differ from a list?
A tuple is a sequence of elements that can be a numeric value, date, character, etc. A tuple is different from a list because it can't be edited, but a list can be edited. We can completely delete a tuple but not add or delete an element in the tuple. Also, the tuple uses round brackets, and the list uses square brackets.
What is the main difference between a pandas Series and a single-column DataFrame in Python?
A single-column DataFrame looks similar to a pandas Series but has rows and columns. On the other hand, a pandas Series is represented by a single column. If we want to apply a pandas Series method on a single column of a DataFrame, it must be converted into a pandas Series. This is the main difference between a single-column DataFrame and a pandas Series.
What is the command to ...