Henry Fuheng Wu's Python 3.1.3 Linux Repo

Waht is Python?

Python is like a virtual CPU (the evaluator), and storage which has 3 things: code objects, state objects, and “regular” objects. The evaluator evaluates the code objects in the context of state objects; the state objects have pointers to namespaces which contain regular objects which the evaluator uses.

New features:

1. Synta check like PHP or Perl

    $./python -E -h
    usage: ./python [option] ... [-c cmd | -m mod | file | -] [arg] ...
    Options and arguments (and corresponding environment variables):
    -l     : check syntax only
    ...
   
   
    $cat m.py
    # -*- coding:utf-8 -*-
    num = 3
    until num == 0:
      print(num)
      num -= 1
    
    $./python -l m.py
    <<m.py>>: OK
    
    $cat m2.py
    #-*- coding: utf-8 -*-
    num = 3
    until num == 0:
      print(num)
      num -= 1
    
    x=0b0121
    
    $./python -l m2.py
    <<m2.py>>: ERROR
    [Syntax error] in <<m2.py>> at line 7:
    "x=0b0121"
            ^
   

2. Python parser speed up, faster DFA graph lookup

3. A new keyword "until"

4. execute any of .py, .pyc or .pyo file without specifying the suffix explicitly

    $ls -al
    total 12
    drwxr-xr-x 2 root root 4096 Jan 14 07:18 ./
    drwxr-xr-x 3 root root 4096 Jan 14 07:18 ../
    -rw-r--r-- 1 root root  178 Jan 14 07:17 x.pyo
    $./../python3 x
    123
    $./../python3 x.py
    123
    $
   

Thinking on:

1. -- GIL --

2. -- Memory --