Shift a string

You're going to create a generator that, given a string, produces a sequence of constituent characters shifted by a specified number of positions shift. For example, the string 'sushi' produces the sequence 'h', 'i', 's', 'u', 's' when we shift by 2 positions to the right (shift = 2). When we shift by 2 positions to the left (shift = -2), the resulting sequence will be 's', 'h', 'i', 's', 'u'.

Tip: use the % operator to cycle through the valid indices. Applying it to a positive or negative number gives a non-negative remainder, which can be helpful when shifting your index.

For example, consider the following variable string = 'python', holding a string of 6 characters:

2 % 6 = 2 (thus, string[2 % 6] is t)
0 % 6 = 0 (thus, string[0 % 6] is p)
-2 % 6 = 4 (thus, string[-2 % 6] is o)

This is a part of the course

“Practicing Coding Interview Questions in Python”

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Exercise instructions

Loop over the indices of a string using the provided len_string variable.
Find which character will correspond to the index when we perform the shift.
Create a generator that shifts the string 'DataCamp' by 3 positions to the right (i.e. "ampDataC").
Create a new string using the generator and print it out.

Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

def shift_string(string, shift):
    len_string = len(string)
    # Loop over the indices of a string
    for idx in ____:
        # Find which character will correspond to the index.
        ____ ____[____]
       
# Create a generator
gen = ____

# Create a new string using the generator and print it out
string_shifted = ''.____
print(string_shifted)

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