Computer Programming Chapter 6 Exercises Exercise 5: Take the following Python c

ID: 3883052 • Letter: C

Question

Computer Programming

Chapter 6 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.

string = "X-DSPAM-Confidence: 0.8475"

start_index = string.find(':')

num = string[start_index+1:].strip()

print float(num)

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