test python linter for some basics

testlinter.py

"""
Test the linter
"""


def real_uninitialized_problem(x):
    """
    Real problem of uninitialized variable
    """
    return x + y


def fake_uninitialized_with_if(x):
    """
    Fake uninitialized variable due to if statement
    """
    if isinstance(x, float):
        y = 0.0
    elif isinstance(x, int):
        y = 0
    else:
        y = ""
    return y+x


def fake_uninitialized_with_switch(x):
    """
    Fake uninitalized variable due to dict/based switch
    """
    cases = {
        float: 0.0,
        int: 0
    }
    if type(x) in cases:
        y = cases[type(x)]
    else:
        y = ""
    return y + x


def real_uninitialized_with_if(x):
    """
    A real problem because y is not unitialized in an else case
    """
    if isinstance(x, (int, float)):
        y = 0.0
    elif isinstance(x, str):
        y = ""
    return y + x