## Sieve of Eratosthenes

0 likes • Nov 19, 2022
Python

## More Python Posts

`x[cat_var].isnull().sum().sort_values(ascending=False)`
```filename = "data.txt"with open(filename, "r") as file:    file_contents = file.readlines()    file_contents = [line.strip() for line in file_contents]
print("File contents:")for line in file_contents:    print(line)```
`def print_pyramid_pattern(n):         # outer loop to handle number of rows    # n in this case    for i in range(0, n):             # inner loop to handle number of columns        # values changing acc. to outer loop        for j in range(0, i+1):                     # printing stars            print("* ",end="")              # ending line after each row        print("\r") print_pyramid_pattern(10)`
```from colorama import init, Fore
# Initialize coloramainit()
print(Fore.RED + "This text is in red color.")print(Fore.GREEN + "This text is in green color.")print(Fore.BLUE + "This text is in blue color.")
# Reset coloramaprint(Fore.RESET + "This text is back to the default color.")```
```# Listlst = [1, 2, 3, 'Alice', 'Alice']
# One-Linerindices = [i for i in range(len(lst)) if lst[i]=='Alice']
# Resultprint(indices)# [3, 4]```
```def generate_pascals_triangle(num_rows):    triangle = []    for row in range(num_rows):        # Initialize the row with 1        current_row = 
# Calculate the values for the current row        if row > 0:            previous_row = triangle[row - 1]            for i in range(len(previous_row) - 1):                current_row.append(previous_row[i] + previous_row[i + 1])
# Append 1 at the end of the row        current_row.append(1)
# Add the current row to the triangle        triangle.append(current_row)
return triangle

def display_pascals_triangle(triangle):    for row in triangle:        for number in row:            print(number, end=" ")        print()

# Prompt the user for the number of rowsnum_rows = int(input("Enter the number of rows for Pascal's Triangle: "))
# Generate Pascal's Trianglepascals_triangle = generate_pascals_triangle(num_rows)
# Display Pascal's Triangledisplay_pascals_triangle(pascals_triangle)```