Adds python 3.9.4 and 3.10.0a7 (#217)

* pkg(python-3.9.4): Adds python 3.9.4

* pkg(python-3.10.0a7): Adds python 3.10.0a7

* pkg(python-3.10.0a7): More pythonic 3.10.0a7 code

* pkg(python-3.10.0a7): Use semver versioning

* pkg(python-3.10.0a7): remove 'py3' alias and add 'py'

* pkg(python-3.9.4): remove 'py3' alias and add 'py'

packages/python/3.10.0-alpha.7/build.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+PREFIX=$(realpath $(dirname $0))
+
+mkdir -p build
+
+cd build
+
+curl "https://www.python.org/ftp/python/3.10.0/Python-3.10.0a7.tgz" -o python.tar.gz
+tar xzf python.tar.gz --strip-components=1
+rm python.tar.gz
+
+./configure --prefix "$PREFIX" --with-ensurepip=install
+make -j$(nproc)
+make install -j$(nproc)
+
+cd ..
+
+rm -rf build 
+
+# This is alpha version, hence most of the libraries are not compatible with python3.10.0
+# bin/pip3 install numpy scipy pandas pycrypto whoosh bcrypt passlib

packages/python/3.10.0-alpha.7/environment

@@ -0,0 +1 @@
+export PATH=$PWD/bin:$PATH

packages/python/3.10.0-alpha.7/metadata.json

@@ -0,0 +1,5 @@
+{
+    "language": "python",
+    "version": "3.10.0-alpha.7",
+    "aliases": ["py", "python3"]
+}

packages/python/3.10.0-alpha.7/run

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+python3.10 "$@"

packages/python/3.10.0-alpha.7/test.py

@@ -0,0 +1,7 @@
+working = True
+
+match working:
+    case True:
+        print("OK")
+    case False:
+        print()

packages/python/3.9.4/build.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+PREFIX=$(realpath $(dirname $0))
+
+mkdir -p build
+
+cd build
+
+curl "https://www.python.org/ftp/python/3.9.4/Python-3.9.4.tgz" -o python.tar.gz
+tar xzf python.tar.gz --strip-components=1
+rm python.tar.gz
+
+./configure --prefix "$PREFIX" --with-ensurepip=install
+make -j$(nproc)
+make install -j$(nproc)
+
+cd ..
+
+rm -rf build 
+
+bin/pip3 install numpy scipy pandas pycrypto whoosh bcrypt passlib

packages/python/3.9.4/environment

@@ -0,0 +1 @@
+export PATH=$PWD/bin:$PATH

packages/python/3.9.4/metadata.json

@@ -0,0 +1,5 @@
+{
+    "language": "python",
+    "version": "3.9.4",
+    "aliases": ["py", "python3"]
+}

packages/python/3.9.4/run

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+python3.9 "$@"

packages/python/3.9.4/test.py

@@ -0,0 +1,18 @@
+execute = (execute_with := lambda *a, **k: lambda f: f(*a, **k))()
+
+
+@int
+@execute
+class n: __int__ = lambda _: 69
+
+
+@execute
+class cout: __lshift__ = print
+
+
+@execute_with(n)
+def output(n):
+    return "OK"
+
+
+cout << output