print "Hello World"

#!/usr/bin/env python

print "Hello World!"

#  Writing to standard out:

print "Python is awesome!"

#  Reading from standard input and output to standard output

name = raw_input("What is your name?")
print name

#String
a = "apple"
type(a)
#print type(a)

#Integer 
b = 3
type(b)
#print type(b)

#Float  
c = 3.2
type(c)
#print type(c)

#Boolean
d = True
type(d)
#print type(d)

14/b

14/c

14./b

#Concatenating strings

a = "Hello"  # String
b = " World" # Another string
print a + b  # Concatenation

# Slicing strings

a = "World"

print a[0]
print a[-1]
print "World"[0:4]
print a[::-1]

# Popular string functions
a = "Hello World"
print "-".join(a)
print a.startswith("Wo")
print a.endswith("rld")
print a.replace("o","0").replace("d","[)").replace("l","1")
print a.split()
print a.split('o')

string = "string"
string[-1] = "y"  #Here we attempt to assign the last character in the string to "y"

for i in range(5):
    print "Hi \n"

for i in range(3):
    for j in range(3):
        print i, j
    
    print "This statement is within the i-loop, but not the j-loop"

# Writing to a file
with open("example.txt", "w") as f:
    f.write("Hello World! \n")
    f.write("How are you? \n")
    f.write("I'm fine.")

# Reading from a file
with open("example.txt", "r") as f:
    data = f.readlines()
    for line in data:
        words = line.split()
        print words

# Count lines and words in a file
lines = 0
words = 0
the_file = "example.txt"

with open(the_file, 'r') as f:
    for line in f:
        lines += 1
        words += len(line.split())
print "There are %i lines and %i words in the %s file." % (lines, words, the_file)


groceries = []

# Add to list
groceries.append("oranges")  
groceries.append("meat")
groceries.append("asparangus")

# Access by index
print groceries[2]
print groceries[0]

# Find number of things in list
print len(groceries)

# Sort the items in the list
groceries.sort()
print groceries

# List Comprehension
veggie = [x for x in groceries if x is not "meat"]
print veggie

# Remove from list
groceries.remove("asparangus")
print groceries

#The list is mutable
groceries[0] = 2
print groceries

L1 = [x**2 for x in range(10)]
L2 = [2**i for i in range(13)]
L3 = [x for x in L1 if x % 2 == 0]
print L1
print L2 
print L3

noprimes = [j for i in range(2, 8) for j in range(i*2, 50, i)]
print noprimes
primes = [x for x in range(2, 50) if x not in noprimes]
print primes

primes = [x for x in range(2, 50) if x not in [j for i in range(2, 8) for j in range(i*2, 50, i) ]]
print primes

# Tuple grocery list

groceries = ('orange', 'meat', 'asparangus', 2.5, True)

print groceries

#print groceries[2]

#groceries[2] = 'milk'

numbers = range(10)
evens = [2, 4, 6, 8]

evens = set(evens)
numbers = set(numbers)

# Use difference to find the odds
odds = numbers - evens

print odds

# Note: Set also allows for use of union (|), and intersection (&)



# A simple dictionary

simple_dic = {'cs591': 'data-mining tools'}

# Access by key
print simple_dic['cs591']


# A longer dictionary
classes = {
    'cs591': 'data-mining tools',
    'cs565': 'data-mining algorithms'
}

# Check if item is in dictionary
print 'cs530' in classes

# Add new item
classes['cs530'] = 'algorithms'
print classes['cs530']

# Print just the keys
print classes.keys()

# Print just the values
print classes.values()

# Print the items in the dictionary
print classes.items()

# Print dictionary pairs another way
for key, value in classes.items():
    print key, value

# Complex Data structures
# Dictionaries inside a dictionary!

professors = {
    "prof1": {
        "name": "Evimaria Terzi",
        "department": "Computer Science",
        "research interests": ["algorithms", "data mining", "machine learning",]
    },
    "prof2": {
        "name": "Chris Dellarocas",
        "department": "Management",
        "interests": ["market analysis", "data mining", "computational education",],
    }
}

for prof in professors:
    print professors[prof]["name"]

for i in [1,2,3,4]:
    print i

for k in {'evimaria': 'terzi', 'aris': 'anagnostopoulos'}:
    print k

for l in 'python is magic':
    print l

list({'evimaria': 'terzi', 'aris': 'anagnostopoulos'})

list('python is magic')

print '-'.join('evimaria')
print '-'.join(['a','b','c'])

i = iter('magic')
print i
print i.next()
print i.next()
print i.next()
print i.next()
print i.next()
print i.next()

a = [x for x in range(10)]
print sum(iter(a))

def func(n):
    for i in range(n):
        yield i

g = func(10)
print g
print g.next()
print g.next()

def demonstrate(n):
    print 'begin execution of the function'
    for i in range(n):
        print 'before yield'
        yield i*i
        print 'after yield'

g = demonstrate(5)
print g.next()
print g.next()
print g.next()
print g.next()

g = (x for x in range(10))
print g
print sum(g)
y = [x for x in range(10)]
print y

def displayperson(name,age):
    print "My name is "+ name +" and I am "+age+" years old."
    return
    
displayperson("Bob","40")

def f (x): return x**2
print f(8)

g = lambda x: x**2
print g(8)

f = lambda x, y : x + y
print f(2,3)

def multiply (n): return lambda x: x*n
 
f = multiply(2)
g = multiply(6)
print f(10), g(10)

multiply(3)(30)

def dollar2euro(x):
    return 0.89*x
def euro2dollar(x):
    return 1.12*x

amounts= (100, 200, 300, 400)
dollars = map(dollar2euro, amounts)
print dollars

amounts= (100, 200, 300, 400)
euros = map(euro2dollar, amounts)
print euros

map(lambda x: 0.89*x, amounts)

a = [1,2,3,4,5]
b = [-1,-2,-3, -4, -5] 
c = [10, 20 , 30, 40, 50]

l1 = map(lambda x,y: x+y, a,b)
print l1
l2 = map (lambda x,y,z: x-y+z, a,b,c)
print l2

nums = [i for i in range(100)]
print nums

even = filter(lambda x: x%2==0 and x!=0, nums)
print even

print reduce(lambda x,y: x+y, [x for x in range(10)])

print reduce (lambda x,y: x if x>y else y, [1, 15, 26, -27])

import random
myList = [2, 109, False, 10, "data", 482, "mining"]
random.choice(myList)

from random import shuffle
x = [[i] for i in range(10)]
shuffle(x)
print x

# Getting data from an API

import requests

width = '200'
height = '300'
#response = requests.get('http://placekitten.com/' + width + '/' + height)
response = requests.get('http://lorempixel.com/400/200/sports/1/')

print response

with open('image.jpg', 'wb') as f:
    f.write(response.content)

from IPython.display import Image
Image(filename="image.jpg")

# Code for setting the style of the notebook
from IPython.core.display import HTML
def css_styling():
    styles = open("theme/custom.css", "r").read()
    return HTML(styles)
css_styling()