Python Test

What value of x will produce the output:

Hi

Mike

x=

if(x!=1):

  print(‘Hello’)

else:

  print(‘Hi’)

print(‘Mike’)

x=“Go”

if(x==“Go”):

  print(‘Go Mike’)

else:

  print(‘Stop’)

print(‘Mike’)

{ “The Bodyguard”:”1992″, “Saturday Night Fever”:”1977″}

select the keys

The variable release_year_dict is a Python Dictionary, what is the result of applying the following method: release_year_dict.values()

How many identical keys can a dictionary have

What is the result of the following code segment:1/2

What is the value of x after the following lines of code:

x=1

x=x+1

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

In Python 3, what is the type of the variable x after the following: x=2/2

Consider the function delta, when will the function return a value of 1

def delta(x):

  if x==0:

    y=1;

  else:

    y=0;

  return(y)

given the function add shown below, what does the following return :

def add(x):

    return(x+x)

add(1)

What is the correct way to sort list ‘B’ using a method, the result should not return a new list, just change the list ‘B’.

what is the output of the following lines of code:

a=1

def do(x):

    return(x+a)

print(do(1))

Write a function name add that takes two parameter a and b, then return the output of a + b (Do not use any other variable! Do not need to run it. Only write the code about how you define it.)

Consider the tuple tuple1=(“A”,”B”,”C” ), what is the result of the following operation tuple1[-1]?

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

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]:

What is the result of the following operation: ‘A,B,C,D’.split(‘,’)

The method append does the following:

What is an important difference between lists and tuples?

Consider the following list : A=[“hard rock”,10,1.2]

what will list A contain affter the following command is run: del(A[1])

If A is a list what does the following syntax do: B=A[:]

what is the result of the following: len((“disco”,10))

What is the output of the following few lines of code?

A=[‘1’,‘2’,‘3’]

for a in A:

  print(2*a)

What is the output of the following few lines of code?

x=5

while(x!=2):

  print(x)

  x=x–1

What is the output of the following few lines of code?

for i,x in enumerate([‘A’,‘B’,‘C’]):

  print(i,2*x)

what is the output of the following:

for i in range(1,5):

    if (i==2):

        print(i)

Consider the class Points, what are the data attributes:

class Point(object):

  def __init__(self,x,y):

    self.x=x

    self.y=y

  def print_point(self):

    print(‘x=’,self.x,‘y=’,self.y)

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(“A”,“B”)

p1.print_point()

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()

what is the result of the following lines of code:

a=np.array([0,1,0,1,0])

b=np.array([1,0,1,0,1])

a*b

what is the result of the following lines of code:

a=np.array([0,1])

b=np.array([1,0])

np.dot(a,b) 

what is the result of the following lines of code:

a=np.array([1,1,1,1,1])

a+10

how would you select the columns with the headers: artist, length and genre from the dataframe df and assign them to the variable y

Consider the dataframe df how would you access the element in the 1st row 3rd column

What function would you use to load a csv file in Pandas

Consider the following text file: Example1.txt:

This is line 1

This is line 2

This is line 3

What is the output of the following lines of code:

with open(“Example1.txt”,“r”) as file1:  

    FileContent=file1.read()

    print(FileContent)

Consider the file object: File1. How would you read the first line of text?

What do the following lines of code do?

with open(“Example1.txt”,“r”) as file1:  

  FileContent=file1.readlines()

  print(FileContent)

Consider the list A, what will be the result of the following operation: set(A)

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

What is the result of the following: ‘1’ in {‘1′,’2’}?

In Python, if you executed name = ‘Lizz’, what would be the output of print(name[0:2])?

Consider the string A=’1934567′, what is the result of the following operation A[1::2]

In Python, what is the result of the following operation: ‘1’+’2′

What is the result of the following: ‘hello’.upper()?

Consider the string Name=”Michael Jackson” , what is the result of the following operation Name.find(‘el’)

What is the result of the following : str(1+1)

What is the result of the following: “ABC”.replace(“AB”, “ab”)?

How do you perform matrix multiplication on the numpy arrays A and B

What values does the variable out take if the following lines of code are run:

X=np.array([[1,0,1],[2,2,2]]) 

out=X[0,1:3]

out

What is the value of Z after the following code is run:

X=np.array([[1,0],[0,1]])

Y=np.array([[2,1],[1,2]]) 

Z=np.dot(X,Y)

What is the type of the following “7.1”

what is the type of the following: 1.0

What is the result of the following code segment: int(12.3)

What is the result of the following code segment: int(False)

Consider the following line of code:

with open(“Example.txt”,“a”) as file1:

What mode is the file object in?

What do the following lines of code do?

with open(“Example.txt”,“a”) as writefile:

  writefile.write(“This is line A\n“)

  writefile.write(“This is line B\n“)

what task do the following lines of code perform:

with open(‘Example2.txt’,’r’) as readfile:
with open(‘Example3.txt’,’w’) as writefile:
for line in readfile:
writefile.write(line)

check the mode of the open function for each file object