Answer:
- import statistics
- def st_dev(file_name):
- with open(file_name) as file:
- data = file.readlines()
- numList = []
- for x in data:
- numList.append(int(x))
-
- return statistics.pstdev(numList)
- print(st_dev("text1.txt"))
Explanation:
The solution code is written using Python.
To ease the calculation task, we can import Python statistics module to use the pstdev method to calculate the population standard deviation of a list of numbers (Line 1).
Next, create a st_dev function that take single argument file_name (Line 3). In the function, it will open the input file and read the data line by line (Line 4-5). Create a for loop to traverse through each line of the data which is an integer and append it to numList (Line 7-8). We can pass the numList to pstdev method (Line 10) and return the resulting standard deviation value as output.
We test the function by passing a file which hold a list of integer values in each line (Line 12).
8
9
12
11
21
15
16
10
7
13
And the output we shall get is 4.019950248448356
Answer:
Explanation:
The following Python code asks the user for inputs for the name to remove and add in the set. It then tries to remove the given name from the list. If it fails it prints out to the user saying that the name does not exist. If it does exist then it removes the name and adds the new name. Finally it prints out the current list of names.
male_names = {'oliver', 'Declan', 'Henry'}
name_to_remove = input("Enter name to remove: ")
name_to_add = input("Enter name to add: ")
try:
male_names.remove(name_to_remove)
male_names.add(name_to_add)
except:
print("Name that you are trying to remove does not exist")
print("List of Names: ")
print(male_names)
Answer:
a) Atomicity:- It is among the one of the ACID properties of transactions.It states that an atomic transaction is irreducible and indivisible series of data operations such that either nothing occurs or all occurs.
b) DML(Data Manipulation Language):- It is a computer programming language that is used for inserting,deleting,manipulating data in the database.For example -SQL.
