Uploaded Test files

venv/Lib/site-packages/sklearn/neighbors/_dist_metrics.pxd

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+#!python
+#cython: boundscheck=False
+#cython: wraparound=False
+#cython: cdivision=True
+
+cimport cython
+cimport numpy as np
+from libc.math cimport fabs, sqrt, exp, cos, pow
+
+from ._typedefs cimport DTYPE_t, ITYPE_t, DITYPE_t
+from ._typedefs import DTYPE, ITYPE
+
+######################################################################
+# Inline distance functions
+#
+#  We use these for the default (euclidean) case so that they can be
+#  inlined.  This leads to faster computation for the most common case
+cdef inline DTYPE_t euclidean_dist(DTYPE_t* x1, DTYPE_t* x2,
+                                   ITYPE_t size) nogil except -1:
+    cdef DTYPE_t tmp, d=0
+    cdef np.intp_t j
+    for j in range(size):
+        tmp = x1[j] - x2[j]
+        d += tmp * tmp
+    return sqrt(d)
+
+
+cdef inline DTYPE_t euclidean_rdist(DTYPE_t* x1, DTYPE_t* x2,
+                                    ITYPE_t size) nogil except -1:
+    cdef DTYPE_t tmp, d=0
+    cdef np.intp_t j
+    for j in range(size):
+        tmp = x1[j] - x2[j]
+        d += tmp * tmp
+    return d
+
+
+cdef inline DTYPE_t euclidean_dist_to_rdist(DTYPE_t dist) nogil except -1:
+    return dist * dist
+
+
+cdef inline DTYPE_t euclidean_rdist_to_dist(DTYPE_t dist) nogil except -1:
+    return sqrt(dist)
+
+
+######################################################################
+# DistanceMetric base class
+cdef class DistanceMetric:
+    # The following attributes are required for a few of the subclasses.
+    # we must define them here so that cython's limited polymorphism will work.
+    # Because we don't expect to instantiate a lot of these objects, the
+    # extra memory overhead of this setup should not be an issue.
+    cdef DTYPE_t p
+    #cdef DTYPE_t[::1] vec
+    #cdef DTYPE_t[:, ::1] mat
+    cdef np.ndarray vec
+    cdef np.ndarray mat
+    cdef DTYPE_t* vec_ptr
+    cdef DTYPE_t* mat_ptr
+    cdef ITYPE_t size
+    cdef object func
+    cdef object kwargs
+
+    cdef DTYPE_t dist(self, DTYPE_t* x1, DTYPE_t* x2,
+                      ITYPE_t size) nogil except -1
+
+    cdef DTYPE_t rdist(self, DTYPE_t* x1, DTYPE_t* x2,
+                       ITYPE_t size) nogil except -1
+
+    cdef int pdist(self, DTYPE_t[:, ::1] X, DTYPE_t[:, ::1] D) except -1
+
+    cdef int cdist(self, DTYPE_t[:, ::1] X, DTYPE_t[:, ::1] Y,
+                   DTYPE_t[:, ::1] D) except -1
+
+    cdef DTYPE_t _rdist_to_dist(self, DTYPE_t rdist) nogil except -1
+
+    cdef DTYPE_t _dist_to_rdist(self, DTYPE_t dist) nogil except -1