Recitation Two MIT | Python Fiddle

#Recitation 2 Code

#What is the decrementing funtion?
#What does this loop do?

#Prints even numbers from 2 to 10
#a =2
#while (a<= 10): 
#    a += 2 
#    print a

#For loop.

#for i in (2,4,6, 8, 10):
#	print i

#for loops require something that is ennumerable
#	that is, to take one element after the other and
#	assign it to (in this case i)
### for loops iterat over enumerable items

#inconvenient to enter all the numbers over large amounts

#Range function

#print range(100)
#print range(1, 100)
#print range (1, 100, 2)
#print range (100, 1, -1)

#for i in range (2, 1001, 2):
#    	print i

#Tuple

#tuple_of_numbers = (3.1459, 2, 1, -100, 100, 240)
#tuple_of_strings = ('What', 'is', 'my', 'name?')

##Tules start at index 0
##print tuple_of_numbers [0]
##print tuple_of_strings [0]
##print tuple_of_strings [-1]
##print tuple_of_strings [-4]

#how many elements in the tuple
##print len(tuple_of_numbers)

#can hold different types
#tuple_of_numbers_and_strings = (3.14159, 'is', 'an imperfect', 'representation')

#including other tuples
#tuple_of_tuples = (('stuff', 'just', 'got', 'real')
#print tuple_of_tuples (0)
#print tuple_of_tuples

##Can't do this! Immutable!  (i.e. can't change it)
##following example attempts to change an element of the tuple
##tuple_of_numbers (0) = 3

## tuples can be sliced
#print tuple_of_numbers
#print tuple_of_numbers [1:3]
##implies to start at index 0
#print tuple_of_numbers [:2]
##implies to begin at 1 and go to end of tuple
#print tuple_of_numbers [1:]
##go from 0 to -1 from the end
#print tuple_of_numbers [:-1]

##iterate over
##for number in tuple_of_numbers:
##	print number

#Oddity

#print 'Before:', tuple_of_numbers
#tuple_of_numbers = tuple_of_numbers + (100, 20)
#print 'After:', tuple_of_numbers
#it creates a new tuple with 100, 20 added

##Wart.

##Possible to create a tuple with a single element

#oopsie = (50)
###Note parentheses is the grouping operator in python
##but also used to make tuples
##this makes integer and assigns to oopsie
#print 'oopsie: ', oopsie

##this is what we want
#onsie = (50,)
#print 'onsie: ', onsie

##Strings
##also immutable; nonscalar

#name = 'Mitch'

#immutable
##name[0] = 'P' - Werong!!

##you can get to individual characters
#print name
#print name[0]
#print name[1]

##iterate over a string
##for letter in name:
##print letter

##print name [1:3]

##they also have functions

#Make upper, lower case
##print name.upper()
##print nam.lower()

##find characters or entire strings
##print name.find('i')

##can replace
##print name.replace('M', 'P')
#name = name.replace ('M', 'P')

#print name

#name=name.lower().replace('t', 'r')

#print name

##dir (str)
##returns all symbols that exist within the str object

##help str
##ex
#help (str.replace)

##example of using break
##break kicks you out of the innermost loop

#x = int(raw_input('Enter an integer: '))
#ans = 0
#While ans**3 < abs(x):
#    	ans = ans +1
#        print 'current guess =', ans
        
#if ans*3 |= abs(x)
#	print x, 'is not a perfect cube'
#else:
#    if x<0
#    	ans = -ans
#    print 'Cube root of ' + str (x) + ' is ' + str(ans)
    
##x= int(raw_input('Enter an integer: '))
#for ans in range (0, abs(x)+1):
#    if ans**3 == abs(x):
#        break
#if ans**3 |= abs(x):
#    print x, 'is not a erfect cube'
#else
#	if x<0:
#        ans = -ans
#    print 'Cube root of ' + str(x) + ' is ' + str(ans)

## Functions
        
#def cube(number):	
## Takes a number and returns the cube of that number.
##	Input: number (float or int)int
##    Output: number (float)
#    return number**3

#print cube(3)
#print cube(5)

#def times2(number):
## Takes a number and doubles it
##	Input: number (float or int)
##    Output: number (float)***
#    answer = number * 2
#    return answer

#print times2(10)

#variable scope

all_hope = 'Here be dragons'
def all_your_vars_are_belong_to_us(variables):
    ##Steals all your variables.
    #Input: variables (stuff)
    #Output: None (it's stolen)
    
    my_variable = 'Make your time'
    print 'parameter passed into the function: ', variables
    print 'Global variable: ', all_hope
    print 'Local variable:', my_variable
     
    
old_meme_is_old = 'Somebody set up us the bomb'
all_your_vars_are_belong_to_us(old_meme_is_old)
    
#print my_variable
##This will give an error - my_variable has local scope

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