removed dependency on futures

laspy/header.py

@@ -1,5 +1,4 @@
 # noinspection PyCompatibility
-from builtins import str
 import datetime
 import uuid
 from laspy import util
@@ -12,6 +11,11 @@
 except NameError:
     xrange = range
 
+try:
+    string_type = basestring
+except NameError:
+    string_type = str
+
 def leap_year(year):
     if ((year % 4) != 0):
         return False
@@ -211,7 +215,7 @@ def set_property(self, name, value):
             packed = struct.pack(fmt.full_fmt, value)
         elif isinstance(value, bytes):
             packed = value
-        elif isinstance(value, str):
+        elif isinstance(value, string_type):
             packed = value.encode()
         else:
             packed = struct.pack(fmt.full_fmt, *value)
@@ -364,7 +368,7 @@ def pack(self, name, val):
         spec = self.fmt.lookup[name]
         if isinstance(val, bytes):
             return val
-        elif isinstance(val, str):
+        elif isinstance(val, string_type):
             return val.encode()
         elif spec.num == 1:
             return(struct.pack(spec.full_fmt, val))
@@ -477,7 +481,7 @@ def pack(self, name, val):
         spec = self.fmt.lookup[name]
         if isinstance(val, bytes):
             return val
-        elif isinstance(val, str):
+        elif isinstance(val, string_type):
             return val.encode()
         elif spec.num == 1:
             return(struct.pack(spec.fmt, val))

setup.py

@@ -40,7 +40,7 @@
                         www.laspy.org, and the source is available at 
                         www.github.com/grantbrown/laspy''',
       packages      = ['laspy', 'laspytest','laspy.tools'],
-      install_requires = ['numpy', 'future'],
+      install_requires = ['numpy'],
       test_suite = 'laspytest.test_laspy',
       data_files = [("laspytest/data", ["simple.las", "simple1_3.las", "simple1_4.las", "simple.laz"])], 
       include_package_data = True,