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Engineering LibreTexts

6.E: Strings (Exercises)

Exercise 5: Take the following Python code that stores a string:`

str = 'X-DSPAM-Confidence:0.8475'

Use find and string slicing to extract the portion of the string after the colon character and then use the float function to convert the extracted string into a floating point number.

Exercise 6:

 

Read the documentation of the string methods at

https://docs.python.org/3.5/library/stdtypes.html#string-methods

You might want to experiment with some of them to make sure you understand how they work. strip and replace are particularly useful.

The documentation uses a syntax that might be confusing. For example, in find(sub[, start[, end]]), the brackets indicate optional arguments. So sub is required, but start is optional, and if you include start, then end is optional.


  1. A tuple is a sequence of comma-separated values inside a pair of parenthesis. We will cover tuples in Chapter 10