$15.$ P $=[3,4,5,6,7,[23,456,67,8,78,78],[345,56,87,8,98,9],(234,6657,6),\{"$key$1"$ :"rgukt" $,234$:$[23,45,656]\}]$

Try to reverse a list

try to access $234$ out of this list

try to access $456$

Try to extract only a list collection form list l

Try to extract "rgukt"

Try to list all the key in dict element available in list

Try to extract all the value element form dict available in list

$16.$Write a python program to find out common letters between two strings.

$17.$ Write a program for the following requirement?

Input: aaaabbbccz

Output: $4$a$3$b$2$c$1$z

$18.$ Write a Python program to check if a Number is Positive, Negative or Zero?

$19.$ How to change the name of key in dictionary

$20.$ How to change the value of any key in nested dictionary

$21.$ How to delete a key from Dictionary

$22.$ What is the output of the below code

s$1=$ 'abc'

s$2=\text{'}123\text{'}$

print$($s$1.$join$($s$2))$

$23.$ How to concatenate multiple dictionary in one

$24.$How to sum all elements of Dictionary.

$25.$ How to multiply all elements of dictionary

$26.$How to sort a dictionary by key

$27.$ How to print Dictionary as table

$28.$ How to remove space between dictionary keys

$29$ How to remove no value items from Dictionary

$30.$ How to filter dictionary based on value

$31.$ How to check number of keys have same value

$32.$ Count the number of occurrences of each character in a string using a dictionary.