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Modifying DataFrames
Reviewing Lambda Function
A lambda function is a way of defining a function in a single line of code. Usually, we would assign them to a variable.
For example, the following lambda function multiplies a number by 2 and then adds 3:
mylambda = lambda x: (x * 2) + 3
print(mylambda(5))The output:
> 13Lambda functions work with all types of variables, not just integers! Here is an example that takes in a string, assigns it to the temporary variable x, and then converts it into lowercase:
stringlambda = lambda x: x.lower()
print(stringlambda("Oh Hi Mark!"))The output:
> "oh hi mark!"Learn more about lambda functions in this article!
Instructions
1.
Create a lambda function mylambda that returns the first and last letters of a string, assuming the string is at least 2 characters long.
For example,
print(mylambda('This is a string'))should produce:
'Tg'