gdsii/record.py

@@ -27,7 +27,6 @@ from . import exceptions, tags, types
 from datetime import datetime
 import math
 import struct
-import numpy
 
 __all__ = [
     'Record',
@@ -77,7 +76,7 @@ def _parse_int2(data):
     data_len = len(data)
     if not data_len or (data_len % 2):
         raise exceptions.IncorrectDataSize('INT2')
-    return numpy.frombuffer(data, dtype='>i2', count=data_len // 2)
+    return struct.unpack('>%dh' % (data_len//2), data)
 
 def _parse_int4(data):
     """
@@ -97,7 +96,7 @@ def _parse_int4(data):
     data_len = len(data)
     if not data_len or (data_len % 4):
         raise exceptions.IncorrectDataSize('INT4')
-    return numpy.frombuffer(data, dtype='>i4', count=data_len // 4)
+    return struct.unpack('>%dl' % (data_len//4), data)
 
 def _int_to_real(num):
     """
@@ -209,7 +208,7 @@ def _pack_int2(data):
         6
     """
     size = len(data)
-    return numpy.array(data).astype('>i2').tobytes()
+    return struct.pack('>{0}h'.format(size), *data)
 
 def _pack_int4(data):
     """
@@ -224,7 +223,7 @@ def _pack_int4(data):
         12
     """
     size = len(data)
-    return numpy.array(data).astype('>i4').tobytes()
+    return struct.pack('>{0}l'.format(size), *data)
 
 def _real_to_int(fnum):
     """
@@ -345,7 +344,12 @@ class Record(object):
         if data is not None:
             self.data = data
         elif points is not None:
-            self.data = numpy.ravel(points)
+            new_data = []
+            # TODO make it faster
+            for point in points:
+                new_data.append(point[0])
+                new_data.append(point[1])
+            self.data = new_data
         elif times is not None:
             mod_time = times[0]
             acc_time = times[1]
@@ -499,7 +503,7 @@ class Record(object):
         data_size = len(self.data)
         if not data_size or (data_size % 2):
             raise exceptions.DataSizeError(self.tag)
-        return numpy.array(self.data).reshape(-1, 2)
+        return [(self.data[i], self.data[i+1]) for i in range(0, data_size, 2)]
 
     @property
     def times(self):