In [ ]:
#We are going to go over concepts from yesterday and things
#That people might be confused about.
#How to define a function and what it means
#Calling functions within functions
#Calling functions confused when to define functions
#and when to define variables
#Intuition behind functions
#e.g. Def inches to centimeters x
#Make connection that x is input in a function
#The word return
#Go through lab 1
#Indentation, columns
#Different brackets

In [130]:
#Write a function called myMultiplier
#that takes in 3 variables and returns the
#multiplication of those 3 variables. And those
#Variables can be int, float, long,

def myMultiplier(a,b,c):
return a*b*c

x=3
y=4
z=5
timnit= myMultiplier(x,y,z)
#timnit = myMultiplier(3,4,5)
print timnit

60

In [254]:
def timnit_multiplier(a,b,c,d,e,f):
return myMultiplier(a,b,c)*myMultiplier(d,e,f)
#what does this return?

In [115]:
def passing_grade(h):
if h>50:
print 'good'#True
return True
else:
return False

In [ ]:
#One function can call another function. What does this function do?
return 'candy'
else:
return 'no_candy'

In [119]:
y=candy_for_grade(100)
print 'y='+str(y)

good
y=no_candy

In [123]:
#if x is None it is evaluated as False.
x=None
if x:
print 'good'
else:

bad

In [255]:
candy_for_grade(51)

good

Out[255]:
'no_candy'
In [59]:
y=timnit_multiplier(3,4,5,6,7,8)
print x

In [ ]:
#How to define a function (review from lab 1)
def inchesToCentimeters(x):
return x*2.54

def doubleIt(x):
return 2*x

def timeFromSeconds(x):
hour = x/60/60
minutes = x/60%60
seconds = x%60

return str(hour) + ':' + str(minutes) + ':' + str(seconds)

In [241]:
#for loops
fruits=['orange', 'pineapple','banana','mango']
x='timnit'
x='meseret'
for x in fruits:
if x=='pineapple':
print x
#break
#continue
print x

orange
pineapple
pineapple
banana
mango

In [217]:
x=[]
str='a b c d e'
y=range(0,len(str)/2)
for y in range(0,len(str)/2):
x += [y]

print x

[0, 1, 2, 3]

In [223]:
y=range(0,len(str)/2)
print y
y[0]
type(y[0])
print [y[0]]
print (type([y[0]]))

[0, 1, 2, 3]
[0]
<type 'list'>

In [195]:
numbers=[1,2,3,4,5,6]
for x in xrange(7):
if x==3:
continue
#break
print x
print x

0
1
2
4
5
6
6

In [ ]:
my_fruits=[]
len(my_fruits)
my_fruits += ['my_'+fruits[0]]
my_fruits += ['my_'+fruits[1]]
my_fruits += ['my_'+fruits[2]]
my_fruits += ['my_'+fruits[3]]
print my_fruits

x=67
x=([67])
y=[]
y += [x[0]]
print y

In [253]:
fruits=['orange', 'pineapple','banana','mango']
#my_fruits=['my_orange', 'my_pineapple','my_banana','my_mango']
#my_favorite_fruits=['pineapple','mango']
#best_fruit = 'banana'

In [158]:
#what does this print?
fruits=['orange', 'pineapple','banana','mango']
x='timnit'
x='meseret'
for x in fruits:
print x
print x

orange
pineapple

In [ ]:
#what does this print?
fruits=['orange', 'pineapple','banana','mango']
x='timnit'
x='meseret'
for y in fruits:
if y=='pineapple':
break
print y
print x

In [ ]:
#what does this print?
fruits=['orange', 'pineapple','banana','mango']
x='timnit'
x='meseret'
for y in fruits:
if y=='pineapple':
break
print y
print x

In [156]:
#what does this print?
fruits=['orange', 'pineapple','banana','mango']
x='timnit'
x='meseret'
for y in fruits:
if y=='pineapple':
break
print y
print x

pineapple
meseret

In [256]:
#what does this print?
fruits=['orange', 'pineapple','banana','mango']
my_fruits=[]
for x in fruits:
print my_fruits

[]
[]
[]
[]

In [257]:
#Example of for loop
fruits = ['orange', 'pineapple', 'banana', 'mango']
my_fruits=[]
for x in fruits:
print x
my_fruits += ['my_'+x]
my_fruits

orange
pineapple
banana
mango

Out[257]:
['my_orange', 'my_pineapple', 'my_banana', 'my_mango']
In [258]:
#Other useful functions:
#It will be helpful for today's lab to know the
#following functions.
#len(x) returns the length of an iterable data
#type (such as a str or list) as an int. For example,
print len('abc')
print len(['a', 'b', 'c'])
print len(['a', ['b', 'c', 'd']])

3
3
2

In [259]:
#range(x) returns a list of ints from 0 to x − 1.
#example,
print range(5)
print range(2, 5) #Start at 2
print range(0, 10, 2) #give every 2 values back

[0, 1, 2, 3, 4]
[2, 3, 4]
[0, 2, 4, 6, 8]

In [ ]:
#What does this do
# Example 1
for x in range(1000):
if x == 6:
break
print x

In [ ]:
#Convert ints to strings
#Say I have 3 variables
hours=0
minutes=1
seconds=0

#I want to output '0:1:0'
#The code below does that
str(hours)+':'+str(minutes)+':'+str(seconds)
#str(x) converts x to string from int