Update version and Python version

Author: CarlKCarlK

README.md

@@ -55,7 +55,7 @@ Detailed Package Install Instructions:
 
 pysnptools has the following dependencies:
 
-python 3.7+ or python 2.7+
+python 3.7 or 3.8 (on MacOS, just 3.7)
 
 Packages:
 

pysnptools/snpreader/bed.py

@@ -347,6 +347,25 @@ def _read(self, iid_index_or_none, sid_index_or_none, order, dtype, force_python
     logging.basicConfig(level=logging.INFO)
     import os
 
+    if False:
+
+        filename = 'M:/deldir/genbgen/good/merged_487400x4840000.bgen'
+
+        import tracemalloc
+        import logging
+        import os
+        logging.basicConfig(level=logging.INFO)
+        from pysnptools.distreader import Bgen
+        tracemalloc.start()
+        print(os.path.getsize(filename))
+        bgen = Bgen(filename)
+        print(bgen.shape)
+        current, peak = tracemalloc.get_traced_memory()
+        print(f"Current memory usage is {current / 10**6}MB; Peak was {peak / 10**6}MB")
+        tracemalloc.stop()
+
+
+
     if False: #Look for example Bed files with missing data
         from pysnptools.util._example_file import pysnptools_hashdown
         from pysnptools.util import example_file

setup.py

@@ -7,7 +7,7 @@
 import numpy
 
 # Version number
-version = '0.4.20'
+version = '0.4.21'
 
 def readme():
     with open('README.md') as f: