python 3.8 support for importlib files api (#189)

* python 3.8 support for importlib files api

* deleted unneeded line

* added the same change to gowin_unpack.py

apycula/gowin_bba.py

@@ -4,7 +4,7 @@
 import gzip
 import argparse
 import re
-from contextlib import contextmanager
+from contextlib import contextmanager, closing
 from collections import Counter
 from apycula import chipdb
 
@@ -255,8 +255,11 @@ def main():
 
  args = parser.parse_args()
  read_constids(args.constids)
- with gzip.open(importlib.resources.files("apycula").joinpath(f"{args.device}.pickle"), 'rb') as f:
+
+ with importlib.resources.path('apycula', f'{args.device}.pickle') as path:
+ with closing(gzip.open(path, 'rb')) as f:
  db = pickle.load(f)
+
  write_chipdb(db, args.output, args.device)
 
 if __name__ == "__main__":

apycula/gowin_pack.py

@@ -10,6 +10,7 @@
 import argparse
 import importlib.resources
 from collections import namedtuple
+from contextlib import closing
 from apycula import codegen
 from apycula import chipdb
 from apycula.chipdb import add_attr_val, get_shortval_fuses, get_longval_fuses, get_bank_fuses
@@ -981,8 +982,11 @@ def main():
  mods = m.group(1) or ""
  luts = m.group(3)
  device = f"GW1N{mods}-{luts}"
- with gzip.open(importlib.resources.files("apycula").joinpath(f"{device}.pickle"), 'rb') as f:
- db = pickle.load(f)
+
+ with importlib.resources.path('apycula', f'{args.device}.pickle') as path:
+ with closing(gzip.open(path, 'rb')) as f:
+ db = pickle.load(f)
+
  with open(args.netlist) as f:
  pnr = json.load(f)
 

apycula/gowin_unpack.py

@@ -8,6 +8,7 @@
 import gzip
 import argparse
 import importlib.resources
+from contextlib import closing
 from apycula import codegen
 from apycula import chipdb
 from apycula import attrids
@@ -1048,8 +1049,9 @@ def main():
  luts = m.group(3)
  _device = f"GW1N{mods}-{luts}"
 
- with gzip.open(importlib.resources.files("apycula").joinpath(f"{_device}.pickle"), 'rb') as f:
- db = pickle.load(f)
+ with importlib.resources.path('apycula', f'{args.device}.pickle') as path:
+ with closing(gzip.open(path, 'rb')) as f:
+ db = pickle.load(f)
 
  global _pinout
  _pinout = db.pinout[_device][_packages[_device]]