Assignment 20 — function implementation

Due before class Monday, March 26

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Module take_two.py

• Your module should implement the below two functions.

• A simple tester taken.py is available.

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Function signum( x )

• Function parameter x is a numeric value. The function does not print any output. The function returns integer -1, 0, or 1 depending respectively whether x is negative, zero, or positive.

• A run of of the tester should produce output

f( -3.5 ): -1

f( 0 ) : 0

f( 5 ): 1

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Function mid( s )

• If the length of s is odd, the function returns the middle character of s; otherwise, the function returns the two middle characters of s. The function does not print any output.

• For example, mid( 'abcdef' ) evaluates to 'cd' and mid( 'abcde' )

• A run of of the tester should produce output

mid( 'abcdef' ): 'cd'

mid( 'abcde' ): 'c'

 

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