add a file to generate version

version.py

@@ -0,0 +1,60 @@
+import sys
+from os.path import exists, dirname, abspath, join
+from subprocess import Popen, DEVNULL, PIPE
+
+
+def check_git():
+    p = Popen(['git', '--help'], stdout=DEVNULL, stderr=DEVNULL)
+    p.wait()
+    return True if p.poll() == 0 else False
+
+
+def get_git_desc():
+    p = Popen(['git', 'describe', '--tags', '--long', '--dirty'], stdout=PIPE,
+              stderr=DEVNULL)
+    p.wait()
+    if p.poll() == 0:
+        return p.stdout.read()
+
+
+def normalize(s: str):
+    li = s.split("-")
+    nv = li[0].split('.')
+    nv = [int(i) for i in nv if i.isnumeric()]
+    if len(li) == 1:
+        nv = [str(i) for i in nv]
+        return '.'.join(nv)
+    if li[1].isnumeric():
+        if len(nv) >= 4:
+            nv[-1] += int(li[1])
+        else:
+            while len(nv) <= 2:
+                nv += [0]
+            nv += [int(li[1])]
+    nv = [str(i) for i in nv]
+    return '.'.join(nv)
+
+
+default_version = "1.0.0"
+use_git = True
+if '--no-git-version' in sys.argv:
+    use_git = False
+    sys.argv.remove("--no-git-version")
+d = abspath(join(dirname(abspath(__file__)), ".git"))
+if not exists(d):
+    use_git = False
+if use_git and not check_git():
+    use_git = False
+if use_git:
+    d = get_git_desc()
+    if d is None:
+        use_git = False
+        version = default_version
+        dversion = version
+    else:
+        d = d.decode().splitlines(False)[0]
+        dversion = d[1:]
+        version = normalize(dversion)
+else:
+    version = default_version
+    dversion = version