Using visual studio python. How do I make the numbers from a data.txt file (numbers are in a single column, seperated into 100 lines) into a single string seperated into a comma?

I'm doing:

from_data = open("data.txt", 'r')

string = ', '.join(from_data)

print(string)

from_data.close()

but they are not in a single line and are seperated into new lines