css_selector_from_by_value.py

def css_selector_from_(by, value):
    if by == By.ID:
        value = "#%s" % value
    elif by == By.CLASS_NAME:
        value = ".%s" % value
    elif by == By.NAME:
        value = '[name="%s"]' % value
    elif by in [By.XPATH, By.CSS_SELECTOR, By.TAG_NAME]:
        value = value
    else:
        raise TypeError("By {} is not supported".format(by))
    return value