Basics

Question 1

Variables

Answer 1

Do not need to be declared. Assigned by:

a=10
b=20

or

a,b=10,20

Question 2

‘a’ + ‘a’

Answer 2

aa

Question 3

‘a’ * 3

Answer 3

aaa

Question 4

Length of strength ‘abc’?

Answer 4

len(‘abc’)

Question 5

Get the letter ‘a’ from the string ‘abc’

Answer 5

‘abc’[0]

Question 6

Get the letter ‘c’ from the string ‘abc’

Answer 6

‘abc’[2] or ‘abc’[-1]

Question 7

From ‘hello world’, get the substring ‘world’

Answer 7

‘hello world’[6:]

Question 8

From ‘hello world’, get the substring ‘ell’

Answer 8

‘hello world’[1:3]

Question 9

Concatenate the strings ‘hello’ and ‘world’ together.

Answer 9

‘hello’ + ‘world’

Question 10

If-else if-else statement

Answer 10

if(x

Question 11

Sequence of numbers from 1 to 10

Answer 11

range(1,10)

Question 12

Sequence of odd numbers from 1 to 10

Answer 12

range(1,10,2)

Question 13

For loop

Answer 13

for i in range(1,10):

print i

Question 14

While loop

Answer 14

while(x<10):
print x
x=x+1

Question 15

Sequence of numbers from 0 to 100000000000

Answer 15

xrange(0, 100000000000)

xrange generates values only as they are needed, so it is faster than range for a large sequence of numbers

Question 16

Delete a variable a

Answer 16

del a

Question 17

Create a function called someFunction

Answer 17

def someFunction():
    print 'I am a function'

Question 18

Default function values

Answer 18

def someFunction(x=true):
    if(x=true):
        print 'default value'
    else:
        print 'changed value'

Question 19

Passing parameters of a function in any order

Answer 19

power(x=4, num=2)

power(num=2, x=4)

Question 20

Variable number of parameters in a function

Answer 20

def multi_add(*args):
    result=0
    for x in args:
        result = result + x
    return result
print multi_add(2,2,3,3,10)
print multi_add(2,2)

Question 21

Conditional statements

Answer 21

Lets you combine if-else statements into a single line.

x,y=1,2
print “x is less than y” if(x

Question 22

Get the index and the value when enumerating over an array in a for loop.

Answer 22

days = [“M”,”T”,”W”,”R”]
for i,d in enumerate(days):
print i,d

# 0 M
# 1 T
# 2 W
# 3 R

Question 23

How you import modules into python?

Answer 23

#import the date class from the datetime module
from datetime import date

#import everything in the module
import calendar

Question 24

Get the current date and time.

Answer 24

datetime. now()
date. today()
datetime. time(datetime.now())

Question 25

Get the date and time a year from now.

Answer 25

from datetime import date
from datetime import time
from datetime import datetime
from datetime import timedelta

datetime.now() + timedelta(days=365)

Question 26

Get the date and time a week ago.

Answer 26

from datetime import date
from datetime import time
from datetime import datetime
from datetime import timedelta

datetime.now() - timedelta(weeks=1)