Why is VS Code unable to convert this List into a Int?

Question

def load_matrix():
matrix = sys.stdin.read()
matrix = matrix.strip().split('\n')
matrix = [row.split(' ') for row in matrix]
for m in matrix:
    matrix=[int(l) for l in m] 
print("\n Data Loaded Sucessfully")
print("\n")
var=pd.DataFrame(matrix)
return var

Look at this piece of code. I am trying to take a matrix directly as the input for the program, but the read function takes the input as a list of strings. To convert it into a int object for performing math functions, i have used the code above. running fine with online compilers but VS Code keeps throwing an error saying:

ValueError: invalid literal for int() with base 10: '4\x1a' (when given the input as:- This )

From what I have researched, this happens when the value passed cannot be converted into an integer.

When I run a similar code in Jupyter notebook it runs smoothly. Your Help will be appreciated.

Your for loop makes no sense. 1) you're trying to turn a list into an int, 2) you're mutating the list that you are iterating over — Fractalism, Jan 23 '23 at 11:45
`\x1a` is marking the end of the file (EOF), `.strip()` doesn't remove it so you have it at the end of your string. — Abdul Aziz Barkat, Jan 23 '23 at 11:49
Well.....pls state the correct method to iterate over the loop and also as pointed out already what i want to do seems to work in Jupyter Notebook all fine. — Rishit Chakraborty, Jan 23 '23 at 11:51

score 0 · Accepted Answer · answered Jan 23 '23 at 12:18

As pointed in the comments, \x1a is the unicode character to indicate EOF. I really don't know what you are trying to achieve in your code, but I can help you fix it.

In my knowledge, x1a takes 1 length in the str, so removing it would be easy as it always be at the end of the matrix.

matrix = matrix.strip().split('\n')
matrix = [x if '\x1a' not in x else x[:len(x)-1] for x in matrix]

It checks for \x1a, if it is found, it removes it from the matrix.

Output (It also includes the edited matrix, or to be exact newly created matrix):

['1 2', '3 4']

 Data Loaded Sucessfully


    0
0   3
1   4

There's [`str.removesuffix`](https://docs.python.org/3/library/stdtypes.html#str.removesuffix) to do that on C level. — STerliakov, Jan 23 '23 at 12:24

Why is VS Code unable to convert this List into a Int?

1 Answers1