raeq

def remove_by_index(original: str = "", index: int = -1) -> tuple:
    if len(original) >= index and index >= 0:
        return (original[:index] + original[index + 1:], original[index])
    else:
        return (original, "")


assert remove_by_index("0123456789", 5) == ("012346789", "5")

raeq

import itertools


def interleave(left: str = "", right: str = "") -> str:

    return "".join(
        [i + j for i, j in itertools.zip_longest(left, right, fillvalue="")])


assert interleave("ABCD", "01") == "A0B1CD"

raeq

def find_char_locations(original: str = "", character: str = "") -> list:

    return [index for index, char in enumerate(original) if char == character]


assert find_char_locations("The jolly green giant.", "e") == [2, 12, 13]

raeq

def concatenate(*argv)->str:
    return ''.join(argv)


assert concatenate("a", "b", "c") == "abc"

raeq

import difflib


def similarity(left: str = "", right: str = "") -> float:

    seq = difflib.SequenceMatcher(None, left, right)
    return seq.ratio()


assert similarity("I like bananas", "I like bananarama") >= 0.80

raeq

def from_csv_line(line: str = "") -> list:

    return line.split(",")


assert from_csv_line("a,b,c") == ["a", "b", "c"]

raeq

def from_list(line: list = []) -> str:

    ret = ", ".join(e for e in line)
    return ret


assert from_list(["a", "b", "c"]) == "a, b, c"
assert from_list(["one", "two", "three"]) == "one, two, three"

raeq

def file_to_list(filename: str = "") -> list:

    with open(filename, "r") as f:
        lines = list(f)

    return lines


assert len(file_to_list("<PATH TO FILE>")) == LINE_COUNT

raeq

def is_null_or_blank(input_string: str = "") -> bool:

    if input_string: 
        if input_string.strip():
            return False
    return True


assert is_null_or_blank(None) == True
assert is_null_or_blank("") == True

raeq

def strip_it(input_string: str) -> tuple:

    return (input_string.lstrip(), input_string.rstrip(), input_string.strip())


left, right, full = strip_it("  A padded  string   ")
assert left == "A padded  string   "
assert right == "  A padded  string"
assert full == "A padded  string"