pip install numpy

import numpy as n

# creating array
d=n.array([1,2,3])
d2=n.array([4,5,6])
print(d) #it doesnt seperated with comma
print(d2) #it doesnt seperated with comma
# performing operation
print(d+d2) #it adds the corresponding elements of the arrays
print(d2-d)  #it subtracts the corresponding elements of the arrays

print(d*d2)  #it multiplies the corresponding elements of the arrays

#similary you can do operation with single element
d3=n.array([10])
print(d*d3)  
print(d+d3)
print(d-d3)

[1 2 3]
[4 5 6]
[5 7 9]
[3 3 3]
[ 4 10 18]
[10 20 30]
[11 12 13]
[-9 -8 -7]

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file = open("filename", "mode")

file = open("example.txt", "r")

file.close()

with open("example.txt", "r") as file:
    content = file.read()
    print(content)  # File is automatically closed after the block

with open("example.txt", "r") as file:
    content = file.read()
    print(content)  # Prints the entire file content

with open("example.txt", "r") as file:
    line = file.readline()
    print(line)  # Prints the first line of the file

with open("example.txt", "r") as file:
    lines = file.readlines()
    print(lines)  # Prints all lines in a list

with open("output.txt", "w") as file:
    file.write("Hello, World!\n")
    file.write("This is a Python program.\n")

lines = ["First line\n", "Second line\n", "Third line\n"]

with open("output.txt", "w") as file:
    file.writelines(lines)

with open("output.txt", "a") as file:
    file.write("This line will be appended.\n")

with open("image.jpg", "rb") as file:
    binary_content = file.read()
    print(binary_content)  # Outputs the binary content of the image

with open("new_image.jpg", "wb") as file:
    file.write(binary_content)  # Writes binary content to a new file

try:
    with open("non_existent_file.txt", "r") as file:
        content = file.read()
except FileNotFoundError:
    print("File not found. Please check the filename.")