Python program that reads in a file called "data.txt" and creates a list of integer values:
# Open the file for reading
with open("data.txt", "r") as file:
# Read the file and split the lines into a list of strings
lines = file.readlines()
# Convert each string in the list to an integer and create a list of integers
integers = [int(line.strip()) for line in lines]
# Print the list of integers
print(integers)
This program uses the built-in open() function to open the file for reading. It then reads in all the lines of the file using readlines() and splits them into a list of strings. It then uses a list comprehension to convert each string in the list to an integer using int() and creates a new list of integers. Finally, it prints the list of integers.
Note that this program assumes that each line in the file contains only a single integer. If your file has a different format (such as multiple integers per line or other types of data), you may need to modify the program accordingly.