Merge branch 'doc_v0.7' of github.com:PythonOT/POT into doc_v0.7

Author: rflamary

ot/lp/emd_wrap.pyx

@@ -19,7 +19,7 @@ import warnings
 
 
 cdef extern from "EMD.h":
-    int EMD_wrap(int n1,int n2, double *X, double *Y,double *D, double *G, double* alpha, double* beta, double *cost, int maxIter)
+    int EMD_wrap(int n1,int n2, double *X, double *Y,double *D, double *G, double* alpha, double* beta, double *cost, int maxIter) nogil
     cdef enum ProblemType: INFEASIBLE, OPTIMAL, UNBOUNDED, MAX_ITER_REACHED
 
 
@@ -110,7 +110,8 @@ def emd_c(np.ndarray[double, ndim=1, mode="c"] a, np.ndarray[double, ndim=1, mod
     G=np.zeros([n1, n2])
 
     # calling the function
-    result_code = EMD_wrap(n1, n2, <double*> a.data, <double*> b.data, <double*> M.data, <double*> G.data, <double*> alpha.data, <double*> beta.data, <double*> &cost, max_iter)
+    with nogil:
+        result_code = EMD_wrap(n1, n2, <double*> a.data, <double*> b.data, <double*> M.data, <double*> G.data, <double*> alpha.data, <double*> beta.data, <double*> &cost, max_iter)
 
     return G, cost, alpha, beta, result_code