Secure your code as it's written. Use Snyk Code to scan source code in minutes - no build needed - and fix issues immediately.
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
from .string_distance import MetricStringDistance
class Levenshtein(MetricStringDistance):
def distance(self, s0, s1):
if s0 is None:
raise TypeError("Argument s0 is NoneType.")
if s1 is None:
raise TypeError("Argument s1 is NoneType.")
if s0 == s1:
return 0.0
if len(s0) == 0:
return len(s1)
if len(s1) == 0:
return len(s0)
v0 = [0] * (len(s1) + 1)
v1 = [0] * (len(s1) + 1)