def int_to_binary(n):
    arr = []
    string = ""
    while n>0:
        a = n%2
        arr.append(a)
        n = n//2
        string = string + str(a)
    return string[-1::-1]

print(int_to_binary(242))

string = 'Sayan'
viowels = 'aeiou'
count=0
for items in range(len(string)):
    if string[items].lower() not in viowels and string[items].isalpha:
        count+=1
print(count)

viowels = 'aeiou'
def recursive_consonants(string):
    if string == '':
        return 0
    if string[0].lower() not in viowels and string[0].isalpha():
        return 1+recursive_consonants(string[1:])
    else:
        return recursive_consonants(string[1:])
print(recursive_consonants('Sayan'))

• readline() returns only one line of the file if not provided with any argument.
• readline() takes only one integer argument and it will print the that number of characters that are passed in the arguments.
• readlines() returns all the lines of the file in the form of a list.
• ‘close’ checks whether a file is closed or not.
• ‘close’ returns a boolean value either True if the file is closed or False if the file is not closed.

f = open('file1.txt', 'r')

print(f.readline(), end = "")

lines = f.readlines()

for line in lines:
    print(line, end = "")

print(" ")

print(f.closed)

f.close()

print(f.closed)

OUTPUT :

Hey, I'm Sayan Dey.
I'm from Chandannagar.
My emai id is - d.sayan1998@gamil.com.
There's a big pandemic situation in the world. Hope everyone is okay.
Stay at home.
Stay safe.
Use sanitizers.
Use hand gloves.
Use handwashes. 
False
True

CONTENT OF MY FILE :

Hey, I’m Sayan Dey.
I’m from Chandannagar.
My emai id is – d.sayan1998@gamil.com.
There’s a big pandemic situation in the world. Hope everyone is okay.
Stay at home.
Stay safe.
Use sanitizers.
Use hand gloves.
Use handwashes.