added 'print' method to Buffer class

cpp/src/arrow/buffer.cc

@@ -18,6 +18,7 @@
 #include "arrow/buffer.h"
 
 #include <cstdint>
+#include <iostream>
 #include <utility>
 
 #include "arrow/memory_pool.h"
@@ -47,6 +48,15 @@ Status Buffer::Copy(const int64_t start, const int64_t nbytes,
   return Copy(start, nbytes, default_memory_pool(), out);
 }
 
+void Buffer::print() {
+  const uint8_t* _data = is_mutable() ? mutable_data() : data();
+
+  for (int64_t i = 0; i < size(); ++i) {
+    std::cout << std::hex << static_cast<unsigned int>(_data[i]);
+  }
+  std::cout << std::endl;
+}
+
 bool Buffer::Equals(const Buffer& other, const int64_t nbytes) const {
   return this == &other || (size_ >= nbytes && other.size_ >= nbytes &&
                             (data_ == other.data_ ||

cpp/src/arrow/buffer.h

@@ -89,6 +89,8 @@ class ARROW_EXPORT Buffer {
 
   bool is_mutable() const { return is_mutable_; }
 
+  void print();
+
   /// Return true if both buffers are the same size and contain the same bytes
   /// up to the number of compared bytes
   bool Equals(const Buffer& other, int64_t nbytes) const;

python/pyarrow/includes/libarrow.pxd

@@ -208,6 +208,7 @@ cdef extern from "arrow/api.h" namespace "arrow" nogil:
         int64_t size()
         shared_ptr[CBuffer] parent()
         c_bool is_mutable() const
+        void print()
         c_bool Equals(const CBuffer& other)
 
     shared_ptr[CBuffer] SliceBuffer(const shared_ptr[CBuffer]& buffer,

python/pyarrow/io.pxi

@@ -868,6 +868,9 @@ cdef class Buffer:
         """
         return <uintptr_t> self.buffer.get().data()
 
+    def print(self):
+        self.buffer.get().print()
+
     @property
     def is_mutable(self):
         """