"""
Interface summary:

        import copy

        x = copy.copy(y)        # make a shallow copy of y
        x = copy.deepcopy(y)    # make a deep copy of y

For module specific errors, copy.Error is raised.

The difference between shallow and deep copying is only relevant for
compound objects (objects that contain other objects, like lists or
class instances).

- A shallow copy constructs a new compound object and then (to the
  extent possible) inserts *the same objects* into it that the
  original contains.

- A deep copy constructs a new compound object and then, recursively,
  inserts *copies* into it of the objects found in the original."""

def myreplace(old, new, s):
    """
    Replace all occurences of old with new in the string s.

      >>> myreplace(',', ';', 'this, that, and, some, other, thing')
      'this; that; and; some; other; thing'
      >>> myreplace(' ', '**', 'Words will now be separated by stars.')
      'Words**will**now**be**separated**by**stars.'
      
    """
    old_removed = s.split(old)
    new_added = new.join(old_removed)
    return new_added
# Shorter version
#    new_added = new.join(s.split(old))

def cleanword(word):
    """
      >>> cleanword('what?')
      'what'
      >>> cleanword('"now!"')
      'now'
      >>> cleanword('?+="word!,@$()"')
      'word'
    """
    cleaned_word = ''
    for i in range(len(word)):
        char = word[i]
        if char.isalpha():
            cleaned_word += char
    return cleaned_word
    

def has_dashdash(s):
    """
      >>> has_dashdash('distance--but')
      True
      >>> has_dashdash('several')
      False
      >>> has_dashdash('critters')
      False
      >>> has_dashdash('spoke--fancy')
      True
      >>> has_dashdash('yo-yo')
      False
    """
    return s.find('--') != -1


def extract_words(s):
    """
      >>> extract_words('Now is the time!  "Now", is the time? Yes, now.')
      ['now', 'is', 'the', 'time', 'now', 'is', 'the', 'time', 'yes', 'now']
      >>> extract_words('she tried to curtsey as she spoke--fancy')
      ['she', 'tried', 'to', 'curtsey', 'as', 'she', 'spoke', 'fancy']
    """
    if has_dashdash(s):
        s = myreplace('--', ' ', s) #using myreplace function from Q. 10
    words_punc = s.split()
    cleanlist = []
    for word in words_punc:
        cleanedword = cleanword(word).lower()
        cleanlist.append(cleanedword)
    return cleanlist
        
        
def wordcount(word, wordlist):
    """
      >>> wordcount('now', ['now', 'is', 'time', 'is', 'now', 'is', 'is'])
      ['now', 2]
      >>> wordcount('is', ['now', 'is', 'time', 'is', 'now', 'is', 'the', 'is'])
      ['is', 4]
      >>> wordcount('time', ['now', 'is', 'time', 'is', 'now', 'is', 'is'])
      ['time', 1]
      >>> wordcount('frog', ['now', 'is', 'time', 'is', 'now', 'is', 'is'])
      ['frog', 0]
    """

    return [word, wordlist.count(word)]


def wordset(wordlist):
    """
      >>> wordset(['now', 'is', 'time', 'is', 'now', 'is', 'is'])
      ['is', 'now', 'time']
      >>> wordset(['I', 'a', 'a', 'is', 'a', 'is', 'I', 'am'])
      ['I', 'a', 'am', 'is']
      >>> wordset(['or', 'a', 'am', 'is', 'are', 'be', 'but', 'am'])
      ['a', 'am', 'are', 'be', 'but', 'is', 'or']
    """

    for word in wordlist:
        count = wordcount(word, wordlist)[1]
        if count > 1:
            for a in range(count - 1):
                wordlist.remove(word)
    wordlist.sort()
    return wordlist
            

def longestword(wordset):
    """
      >>> longestword(['a', 'apple', 'pear', 'grape'])
      5
      >>> longestword(['a', 'am', 'I', 'be'])
      2
      >>> longestword(['this', 'that', 'supercalifragilisticexpialidocious'])
      34
    """
    longest = 0
    for word in wordset:
        length = len(word)
        if length > longest:
            longest = length
    return longest


if __name__ == '__main__':
    import doctest
    doctest.testmod()

#sort_fruits.py

source = open('unsorted_fruits.txt', 'r')
fruits = source.readlines()
source.close()
fruits.sort()
newfile = open('sorted_fruits.txt', 'w')
newfile.writelines(fruits)
newfile.close()

#mean.py

from sys import argv

nums = argv[1:]

for i, value in enumerate(nums):
    nums[i] = float(value)

mean = sum(nums) / len(nums)

print mean

#median.py

from sys import argv
nums = argv[1:]

for i, value in enumerate(nums):
    nums[i] = float(value)

nums.sort()
size = len(nums)
middle = size / 2

if size % 2 == 0:
    median = (nums[middle - 1] + nums[middle]) / 2
else:
    median = nums[middle]

if median == float(int(median)):
    median = int(median)

print median

#
# countletters.py
#

def display(i):
    if i == 10: return 'LF'
    if i == 13: return 'CR'
    if i == 32: return 'SPACE'
    return chr(i)

from sys import argv

filename = argv[1]

infile = open(filename, 'r')
text = infile.read()
infile.close()

counts = 128 * [0]

for letter in text:
    counts[ord(letter)] += 1

filenamesplit = filename.split('.') # splits 'name.txt' -> ['name', 'txt']
count_file = filenamesplit[0] + '_counts.dat' # 'name' -> 'name_counts.dat'

outfile = open(count_file, 'w')
outfile.write("%-12s%s\n" % ("Character", "Count"))
outfile.write("=================\n")

for i in range(len(counts)):
    if counts[i]:
        outfile.write("%-12s%d\n" % (display(i), counts[i]))

outfile.close()