properly import gsf file

gwygsf/__init__.py

@@ -1,2 +1,2 @@
 """gwygsf: Gwyddion Simple Field File Format Parser"""
-from .readfile import *
+from .GSF import *

gwygsf/readfile.py

@@ -4,21 +4,28 @@ import numpy as np
 class ParseError(Exception):
 	"""Exception thrown when an error occurs when parsing a GSF file."""
 
+def skiplen(f):
+	l = 4 - (f.tell() % 4)
+	for i in range(0,l):
+		if f.read(1) != b'\0':
+			raise ParseError("Truncated null padding")
+
 def fromfile(self, filename):
 	"""Parse the GSF file into the class. Throws ParseError."""
+
 	with open(filename, 'rb') as f:
 		magic = f.readline()
 		self.attr = {}
 		if magic != b"Gwyddion Simple Field 1.0\n":
 			raise ParseError("Magic line not found")
-		while f.peek(1) != b'\0':
-			line = f.readline().split(b'=')
-			if len(line) != 2:
-				raise ParseError("Malformed attribute line")
-			self.attr[str(line[0].strip())] = line[1].strip()
-		while f.read(1) == b'\0':
-			pass
+		while f.peek(1)[0] != 0:
+			line = f.readline()
+			if line.rfind(b'=') < 0:
+				raise ParseError("Invalid attribute line")
+			line = line.split(b'=')
+			self.attr[line[0].strip().decode()] = line[1].strip().decode()
+		skiplen(f)
 
 		self.x = int(self.attr["XRes"])
 		self.y = int(self.attr["YRes"])
-		self.d = np.reshape(np.fromfile(f,type=np.float32), (self.y, self.x))
+		self.d = np.reshape(np.fromfile(f,dtype=np.float32), (self.y, self.x))