def replace(old_text, new_text, start, end):
    start_text = old_text[:start]

    if end < (len(old_text) - 1):
        end_text = old_text[end + 1:]
    else:
        end_text = ''

    return start_text + new_text + end_text


def is_integer(text):
    try:
        int(text)
        return True
    except ValueError:
        return False


def unwrap_quotes(string):
    if string.startswith('"') and string.endswith('"'):
        return unwrap_quotes(string[1:-1])
    elif string.startswith("'") and string.endswith("'"):
        return unwrap_quotes(string[1:-1])

    return string


def strip(value):
    if value is None:
        return value

    if isinstance(value, list):
        return [strip(x) for x in value]

    if isinstance(value, dict):
        result = {}
        for k, v in value.items():
            result[strip(k)] = strip(v)
        return result

    if isinstance(value, str):
        return value.strip()

    return value


def is_blank(value):
    if not value:
        return True
    if not value.strip():
        return True
    return False


def values_to_string(value):
    if not value:
        return value

    if isinstance(value, dict):
        return {k: str(v) for k, v in value.items()}

    if isinstance(value, list):
        return [str(element) for element in value]

    return value