Practical Data Science using Python - Python Lambda Functions and Date-Time Operations

The video tutorial covers the use of the filter function in Python, demonstrating its application with user-defined and Lambda functions. It explains how to filter elements from an iterable based on a condition. The tutorial also delves into datetime operations, including creating date objects, calculating time deltas, and converting strings to datetime objects. Additionally, it explores using Pandas for datetime operations, such as creating date ranges and extracting date components.

What does the filter function return when applied to an iterable?

• A list of all elements

• Only elements that satisfy the filter condition

• The first element of the iterable

• A boolean value

Which of the following can be used with the filter function?

• Only built-in functions

• User-defined functions, lambda expressions, or lambda function names

• Only lambda expressions

• Only user-defined functions

In the context of the filter function, what does a lambda expression return?

• A string

• A number

• A boolean value

• A list

What is the first step in performing datetime operations in Python?

• Formatting a date string

• Importing the datetime module

• Creating a date object

• Calculating the difference between two dates

How can you find the difference between two dates in Python?

• Using the subtract function

• Using the datetime function

• By subtracting one date object from another

• By converting dates to strings

Which function is used to convert a string into a datetime object?

• timedelta

• datetime

• strptime

• strftime

What does the strftime function do?

• Calculates the difference between two dates

• Creates a date range

• Formats a datetime object into a string

• Converts a string to a datetime object

Which library provides the to_datetime function?

• NumPy

• Matplotlib

• Pandas

• SciPy

What does the date_range function in pandas do?

• Formats a datetime object

• Creates a range of dates

• Calculates the difference between two dates

• Converts a string to a datetime object

How can you extract the year component from a datetime object in a pandas DataFrame?

• Using the date_range function

• Using the year attribute of the datetime object

• Using the strftime function

• Using the strptime function