Python for Data Science

Consider the function add, what is the result of calling the following Add('1','1') (look closely at the return statement ) def Add(x,y): z=y+x return(y)

'1'

What is the output of the following few lines of code ? A=['1','2','3'] for a in A: print(2*a)

'11' '22' '33'

The variables A='1' and B='2' ,what is the result of the operation A+B?

'12'

Consider the string A='1234567', what is the result of the following operation: A[1::2]

'246'

What does the following loop print? for n in range(3): print(n+1)

1 2 3

Consider the tuple A=((11,12),[21,22]), that contains a tuple and list. What is the result of the following operation A[0][1]:

12

how many iterations are performed in the following loop? for n in range(3): print(n)

3

Consider the string Name="Michael Jackson" , what is the result of the following operation Name.find('el')

5

What is the result of the following operation 3+2*2?

7

Consider the variable F="You are wrong", Convert the values in the variable F to uppercase?

F.upper()

What is the output of the following lines of code: x="Go" if(x!="Go"): print('Stop') else: print('Go ') print('Mike')

Go Mike

What is the output of the following lines of code: x="Go" if(x=="Go"): print('Go ') else: print('Stop') print('Mike')

Go Mike

What is the result of the print("Hello\nWorld!") statement?

Hello World!

Consider the class Points, what are the data attributes: class Points(object): def __init__(self,x,y): self.x=x self.y=y def print_point(self): print('x=',self.x,'y=',self.y)

self.x.self.y

What is the result of the following operation int(3.2)?

3

Concatenate the following lists A=[1,'a'] and B=[2,1,'d']:

A+B

How do you cast the list 'A' to the set 'a'?

a=set(A)

What is the type of the following variable: True?

bool

What is the output of executing the following statement: # print('Hello World!')?

There is no output as it is a comment. (A # is always a comment)

What is the result of the following operation '1,2,3,4'.split(',')

['1','2','3','4']

Consider the tuple A=((11,12),[21,22]), that contains a tuple and list. What is the result of the following operation A[1]:

[21,22]

Enter the code to convert the number 1 to a Boolean.

bool(1)

What is the type of the following: int(1.0)?

int

Consider the following line of code: with open(example1,"r") as file1: What mode is the file object in?

read

What is the result of running the following lines of code ? class Points(object): def __init__(self,x,y): self.x=x self.y=y def print_point(self): print('x=',self.x,' y=',self.y) p1=Points(1,2) p1.print_point()

x=1 y=2

What is the result of running the following lines of code ? class Points(object): def __init__(self,x,y): self.x=x self.y=y def print_point(self): print('x=',self.x,' y=',self.y) p2=Points(1,2) p2.x=2 p2.print_point()

x=2 y=2

Consider the Set: V={'A','B','C' }, what is the result of V.add('C')?

{'A','B','C'}

Consider the Set: V={'A','B'}, what is the result of V.add('C')?

{'A','B','C'}