finished ctython interfae

example.py

@@ -1,13 +1,22 @@
 import tdm_ripper
+import numpy as np
 
 tdmpath = b"samples/SineData.tdm"
 tdxpath = b"samples/SineData.tdx"
 
-rippobj = tdm_ripper.pytdmripper(tdmpath)
+# create instance of ripper class
+RP = tdm_ripper.pytdmripper(tdmpath)
 
-rippobj.show_channels()
+# provide overview of available channels
+RP.show_channels()
 
-print(rippobj.num_channels())
-print(rippobj.num_groups())
+print(RP.num_channels())
+print(RP.num_groups())
 
-rippobj.print_channel(1,b"SineData_extract.dat")
+# print particular channel to file
+RP.print_channel(1,b"SineData_extract.dat")
+
+# extract channel and return it to numpy array
+chann = RP.get_channel(1)
+
+print(dim(chann))

pytdm_ripper.pyx

@@ -5,8 +5,8 @@ from tdm_ripper cimport tdm_ripper
 
 cdef class pytdmripper:
 
-    # use pointer since there's no nullary constructor
-    cdef tdm_ripper*cripp
+    # pointer to C++ instance (since there's no nullary constructor)
+    cdef tdm_ripper *cripp
 
     def __cinit__(self, string tdmfile):
         self.cripp = new tdm_ripper(tdmfile)
@@ -23,5 +23,8 @@ cdef class pytdmripper:
     def num_groups(self):
         return self.cripp.num_groups()
 
-    def print_channel(self,int channelid, const char* filename):
+    def get_channel(self, int channelid):
+        return self.cripp.get_channel(channelid)
+
+    def print_channel(self, int channelid, const char* filename):
         self.cripp.print_channel(channelid,filename)

tdm_ripper.pxd

@@ -11,4 +11,5 @@ cdef extern from "tdm_ripper.hpp":
         void show_channels()
         int num_channels()
         int num_groups()
+        vector[double] get_channel(int)
         void print_channel(int,const char*)