General Python Question

Any particular line number that's causing the error? If I run it in my workspace, I get back the full list of Harshad numbers.

Bryan, tried it but got "SyntaxError":

def isHarshad(num): num_string = str(num) num_list = list(num_string) num_int_list = [] num_sum = 0 for x in num_list: num_sum += int(x) num_result = num/num_sum if num_result == round(num_result): return True else: return False

harshad_numbers = []

for num in range(1, 501): if isHarshad(num) == True: harshad_numbers.append(num)

print(harshad_numbers) SyntaxError: invalid syntax

Chris, it didn't work (with "[x" highlighted):

def is_harshad(num): return num % sum([int(x) for x in list(str(num))]) == 0

[x for x in range(1, 500) if is_harshad(x)]

SyntaxError: invalid syntax

1 to 500 not 1 to 100

I'm using the Python IDLE terminal

Have you tried it on the Python IDLE terminal?

I'm a moron! I didn't run the module properly; I hit "enter" in the shell instead of going up to the Run tab and hitting "Run Module." Both of your guys' codes did indeed work.

Now try this:

In this assignment we will be reading and writing to files and creating a library that you will import for use in your main program.

Givens: I have created a text file, Rumbers.txt, that contains 5000 random numbers. These numbers are stored in ten columns. The columns are separated by tabs and rows end with a newline.

You already have your isHarshad() function from assignment 1. We are going to use it here.

The Task: You need to find/create three things

The sum of the Harshad numbers in ‘Rumbers.txt’. An output file containing all the Harshad numbers with a ‘7’ in the tens place. The numbers that are Harshad, have a 7 in the second column and are evenly divisible by 41.

The Hows or “What we need to see”

You need to provide three files.

1. A file called “myLib.py” Inside this file should reside two functions, isHarshad() and Siete(). isHarshad() will accept a string and return True if the input is a Harshad number and False if it is not. isSiete() will accept a string and will return True if the second column digit of the number is a ‘7’ and False if it is not. Lastly, you are to create a constant variable called “Seaver” and set it equal to 41. All three of these items will be imported by your main program.

2. A main program that reads in “Rumbers.txt” and creates the three deliverables above. This main program will open Rumbers.txt, import functions and the Seaver variable from myLib.py, do the processing necessary to find the solutions and create the output file we need, and then will close “Rumbers.txt” and the output file (see below). As output this program will print out the sum of the Harshad numbers and print the numbers that are harshad numbers with a seven in the tens column and are also multiples of the Seaver constant.

3. An output file named “HarshOut.txt” that contains all of the Harshad numbers that have a ‘7’ in their second column.

They're from a class assignment

Hi could someone please do and explain the following two questions. I'm really having trouble with Python. Im using IDLE shell 3.10.2

1) A Harshad number (or a Niven number) is a number that is evenly divisible by the sum of its digits. An example is 18 (1+8=9, 18%9 = 0) or 270 (2+7+0=9, 270%9 = 0).

Write a function called isHarshad(num) that takes an integer as an argument and returns True if the number is a Harshad number and False if it is not. Then, use this function to create a list of all of the Harshad numbers in the first 500 natural numbers.

2) In this assignment we will be reading and writing to files and creating a library that you will import for use in your main program.

Givens:

I have created a text file, Rumbers.txt, that contains 5000 random numbers. These numbers are stored in ten columns. The columns are separated by tabs and rows end with a newline.

You already have your isHarshad() function from assignment 1. We are going to use it here.

The Task:

You need to find/create three things

The sum of the Harshad numbers in ‘Rumbers.txt’. An output file containing all the Harshad numbers with a ‘7’ in the tens place (second column). The numbers that are Harshad, that have a 7 in the second column and are evenly divisible by the constant ‘Hodges’. You will count these and print them to the screen, no need to save these to a file. The Hows or “What we need to see”

You need to provide three files.

A file called “myLib.py” Inside this file should reside two functions, isHarshad() and isSiete(). isHarshad() will accept an integer and return True if the input is a Harshad number and False if it is not. isSiete() will accept an integer and will return True if the second column digit (The ‘tens’ column) of the number is a ‘7’ and False if it is not. Lastly, you are to create a constant variable called “Hodges” and set it equal to 14. All three of these items will be imported by your main program. A main program called mainProg.py that reads in “Rumbers.txt” and creates the three deliverables above. This main program will open Rumbers.txt, import functions and the Hodges variable from myLib.py, do the processing necessary to find the solutions and create the output file we need, and then will close “Rumbers.txt” and the output file (see below). As output (to the screen) this program will print out the sum of the Harshad numbers (deliverable #1) and print the numbers that are harshad numbers with a seven in the tens column and are also multiples of the Hodges constant (deliverable #3). An output file named “HarshOut.txt” that contains all of the Harshad numbers that have a ‘7’ in their second column.