6-3

#! /usr/bin/env python3.2
# -*- coding: utf-8 -*-

# main.py
""" Task: Exercise 6.3
    Encapsulate this code in a function named count, and generalize it so that
    it accepts the string and the letter as arguments.

    word = 'banana'
    count = 0
    for letter in word:
        if letter == 'a':
            count = count + 1
    print(count)
"""

''' Functions '''
def count(word, letter):
    count = 0
    for letter in word:
        if letter == 'a':
            count += 1
    return count

''' Test '''
word = 'banana'
count = count(word, 'a')
print(count)