backport from main

* rename swig files .i in .swig
* update constraint_solver and routing
* backport math_opt changes
* move dynamic loading to ortools/third_party_solvers

ortools/linear_solver/samples/assignment_groups_mip.py

@@ -16,6 +16,7 @@
 """Solve assignment problem for given group of workers."""
 # [START import]
 from ortools.linear_solver import pywraplp
+
 # [END import]
 
 

ortools/linear_solver/samples/assignment_mb.py

@@ -20,6 +20,7 @@ import io
 import pandas as pd
 
 from ortools.linear_solver.python import model_builder
+
 # [END import]
 
 

ortools/linear_solver/samples/assignment_mip.py

@@ -16,6 +16,7 @@
 # [START program]
 # [START import]
 from ortools.linear_solver import pywraplp
+
 # [END import]
 
 

ortools/linear_solver/samples/assignment_task_sizes_mip.py

@@ -16,6 +16,7 @@
 """MIP example that solves an assignment problem."""
 # [START import]
 from ortools.linear_solver import pywraplp
+
 # [END import]
 
 

ortools/linear_solver/samples/assignment_teams_mip.py

@@ -16,6 +16,7 @@
 """MIP example that solves an assignment problem."""
 # [START import]
 from ortools.linear_solver import pywraplp
+
 # [END import]
 
 

ortools/linear_solver/samples/basic_example.py

@@ -17,6 +17,7 @@
 # [START import]
 from ortools.init.python import init
 from ortools.linear_solver import pywraplp
+
 # [END import]
 
 

ortools/linear_solver/samples/bin_packing_mb.py

@@ -20,6 +20,7 @@ import io
 import pandas as pd
 
 from ortools.linear_solver.python import model_builder
+
 # [END import]
 
 

ortools/linear_solver/samples/bin_packing_mip.py

@@ -16,6 +16,7 @@
 # [START program]
 # [START import]
 from ortools.linear_solver import pywraplp
+
 # [END import]
 
 
@@ -31,6 +32,7 @@ def create_data_model():
     data["bin_capacity"] = 100
     return data
 
+
 # [END data_model]
 
 

ortools/linear_solver/samples/clone_model_mb.py

@@ -18,6 +18,7 @@
 import math
 
 from ortools.linear_solver.python import model_builder
+
 # [END import]
 
 

ortools/linear_solver/samples/integer_programming_example.py

@@ -16,6 +16,7 @@
 # [START program]
 # [START import]
 from ortools.linear_solver import pywraplp
+
 # [END import]
 
 

ortools/linear_solver/samples/linear_programming_example.py

@@ -16,6 +16,7 @@
 # [START program]
 # [START import]
 from ortools.linear_solver import pywraplp
+
 # [END import]
 
 

ortools/linear_solver/samples/mip_var_array.py

@@ -17,6 +17,7 @@
 # [START program]
 # [START import]
 from ortools.linear_solver import pywraplp
+
 # [END import]
 
 
@@ -37,6 +38,7 @@ def create_data_model():
     data["num_constraints"] = 4
     return data
 
+
 # [END data_model]
 
 

ortools/linear_solver/samples/multiple_knapsack_mip.py

@@ -16,6 +16,7 @@
 """Solve a multiple knapsack problem using a MIP solver."""
 # [START import]
 from ortools.linear_solver import pywraplp
+
 # [END import]
 
 

ortools/linear_solver/samples/simple_lp_program.py

@@ -16,6 +16,7 @@
 # [START program]
 # [START import]
 from ortools.linear_solver import pywraplp
+
 # [END import]
 
 

ortools/linear_solver/samples/simple_lp_program_mb.py

@@ -18,6 +18,7 @@
 import math
 
 from ortools.linear_solver.python import model_builder
+
 # [END import]
 
 

ortools/linear_solver/samples/simple_mip_program.py

@@ -16,6 +16,7 @@
 # [START program]
 # [START import]
 from ortools.linear_solver import pywraplp
+
 # [END import]
 
 

ortools/linear_solver/samples/simple_mip_program_mb.py

@@ -18,6 +18,7 @@
 import math
 
 from ortools.linear_solver.python import model_builder
+
 # [END import]
 
 

ortools/linear_solver/samples/stigler_diet.py

@@ -20,6 +20,7 @@ https://en.wikipedia.org/wiki/Stigler_diet.
 """
 # [START import]
 from ortools.linear_solver import pywraplp
+
 # [END import]