# Week 1
# 
# TA: Francis Hsu
# Email: fahsu@ucdavis.edu
# Website: http://wwwcsif.cs.ucdavis.edu/~cs145t
# Office Hours: 3104 Kemper, Tue 3-4:30 Wed 3-4:30

## Python Introduction ##

######################################################################
# Numbers

1/2           # integer division

1/2.0         # float division

math.sqrt(42) # remember to import math first

2**2**2**2**2 # almost a 20,000 digit number

######################################################################
# Strings

s = "the mind is a terrible thing to waste"

s.index("waste")

s[32]

s[32:]        # slicing

s[-5:]

s[:-5]

s[32] = "t"   # error

l = list(s)   # list conversion

l[32] = "t"

s = ''.join(l)

######################################################################
# Lists

x = [ 2 ]

y = range(10)

z = ['moo'] * 3 # multiply lists

x + y + z       # add lists

x.append(4)     # lists are mutable

x.pop()

x.extend([3,1,4])

x.sort()

x.reverse()

x[2:] = x[0:]

del x[0:2]

x[0] = x[:]     # nested lists

######################################################################
# Tuples

x = tuple(range(5))

x[0] = 1      # error

######################################################################
# Dictionaries

courses = {'140': 'prog lang', '142': 'compilers'}

'142' in courses

courses.keys()

courses['145'] = 'script lang'

courses.get('145')

######################################################################
# Files

f = open("file1")

s = f.read()

lines = f.readlines()

lines.sort()

f = open("file2", "w")

s = ''.join(lines)

f.write(s)

######################################################################
# Functions

def foo (arg):
    if str(arg) == '':
        return
    else :
        foo(str(arg)[0:-1])
        print arg

######################################################################
# An extended version of tme.py from lecture
# tme-dis.py

import sys

def checkline():
    global l
    global wordcount
    global palindromecount
    if isPalindrome(l):
        palindromecount += 1
    w = l.split()
    wordcount += len(w)

def isPalindrome(l):
    lower = l.lower()
    nospace = lower.replace(' ','')
    front = list(nospace[len(nospace)/2:])
    back = list(nospace[:len(nospace)/2])
    back.reverse()
    return front == back

def pigLatinWord(w):
    if w[0] in ['a', 'e', 'i', 'o', 'u']:
        return w+"way"
    else:
        return w[1:]+w[0]+"ay"
    
wordcount = 0
f = open(sys.argv[1])
flines = f.readlines()
linecount = len(flines)
for l in flines:
    checkline()
print linecount, wordcount, palindromecount
pl = []
for l in flines:
    for w in l.split():
        pl.append(pigLatinWord(w))
    print ' '.join(pl)
    pl = []