#  Python 2.7 file for Numerical Methods II, Spring 2016
#  http://www.math.nyu.edu/faculty/goodman/teaching/NumericalMethodsII2016/index.html

#  File: PythonBasics.py

#  See that you can run basic Python

#  Type: python PythonBasics.py   ... and hope for the best

print "Hello world, from python"                                         #  bullet 1

WelcomeString = "Hello world, again, from python"                        #  bullet 2
print WelcomeString

WelcomeStart = "A final hello world "                                    #  bullet 3
WelcomeEnd   = "from python"
print WelcomeStart + WelcomeEnd

x = 10                                                                   #  bullet 4
y = 3
print str(x) + " + " + str(y) + " = " + str(x+y)                         #  bullet 5
print str(x) + " / " + str(y) + " = " + str(x/y)                         #  bullet 6
x = 10.0                                                                 #  bullet 7
OutputString = str(x) + " / " + str(y) + " = " + str(x/y)                #  bullet 8
print OutputString

print "x has type " + str(type(x)) + ", and y has type " + str(type(y))  #  bullet 9

DumbList = []                                                            #  bullet 10
print "DumbList has type " + str(type(DumbList))

DumbList.append(x)                                                       #  bullet 11
DumbList.append(y)                                                       #  bullet 12
DumbList.append(WelcomeString)
print "Now DumbList has " + str( len(DumbList) ) + " items"              #  bullet 13

ListNumber = 0   # numbers the elements of DumbList
for item in DumbList:                                                    #  bullet 14
   print "Item number " + str(ListNumber) + \
         " has type: "  + str(type(item)) + \
         " and value: " + str(item)
   ListNumber = ListNumber + 1
print "DumbList has value: " + str(DumbList)                             #  bullet 15

SmartList = DumbList                                                     #  bullet 16
print "SmartList has value:    " + str(SmartList)

DumbList[0] = "Not ten"                                                  #  bullet 17
print "Now DumbList has value:  " + str(DumbList)                        #  bullet 18
print "And SmartList has value: " + str(SmartList)                       #  bullet 19

a = 5
b = a               #  This is a deep copy, why?
a = 6
print "a = " + str(a) + ", and b = " + str(b)                            #  bullet 20

m       = 5
n       = 10
iList   = range(m,n)                                                     #  bullet 21
print "iList has type " + str(type(iList)) + ", and value " + str(iList)
squares = []
for i in range(m,n):                                                     #  bullet 22
   squares.append(i*i)
print "The squares are: " + str(squares)                                 #  bullet 23