开始慢慢学习这本书了。。Python编程实战：运用设计模式、并发和程序库创建高质量程序

wheat

　　没办法，不到设计模式，算法组合这些，在写大一点程序的时候，总是力不从心。。。：（
　　一开始可能要花很多时间来慢慢理解吧，，这毕竟和《大话设计模式》用的C#语言有点不太一样。。。
　　书上代码是3版本的，有些库的用法不一样，还要改回2.7的才可以测试。。：（




#!/usr/bin/env python3
# Copyright 漏 2012-13 Qtrac Ltd. All rights reserved.
# This program or module is free software: you can redistribute it
# and/or modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version. It is provided for
# educational purposes and is distributed in the hope that it will be
# useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
import os
import sys
import tempfile

def main():
if len(sys.argv) > 1 and sys.argv[1] == "-P": # For regression testing
create_diagram(DiagramFactory()).save(sys.stdout)
create_diagram(SvgDiagramFactory()).save(sys.stdout)
return
textFilename = os.path.join(tempfile.gettempdir(), "diagram.txt")
svgFilename = os.path.join(tempfile.gettempdir(), "diagram.svg")
txtDiagram = create_diagram(DiagramFactory())
txtDiagram.save(textFilename)
print("wrote", textFilename)
svgDiagram = create_diagram(SvgDiagramFactory())
svgDiagram.save(svgFilename)
print("wrote", svgFilename)

def create_diagram(factory):
diagram = factory.make_diagram(30, 7)
rectangle = factory.make_rectangle(4, 1, 22, 5, "yellow")
text = factory.make_text(7, 3, "Abstract Factory")
diagram.add(rectangle)
diagram.add(text)
return diagram

class DiagramFactory:
def make_diagram(self, width, height):
return Diagram(width, height)

def make_rectangle(self, x, y, width, height, fill="white",
stroke="black"):
return Rectangle(x, y, width, height, fill, stroke)

def make_text(self, x, y, text, fontsize=12):
return Text(x, y, text, fontsize)

class SvgDiagramFactory(DiagramFactory):
def make_diagram(self, width, height):
return SvgDiagram(width, height)

def make_rectangle(self, x, y, width, height, fill="white",
stroke="black"):
return SvgRectangle(x, y, width, height, fill, stroke)

def make_text(self, x, y, text, fontsize=12):
return SvgText(x, y, text, fontsize)

BLANK = " "
CORNER = "+"
HORIZONTAL = "-"
VERTICAL = "|"

class Diagram:
def __init__(self, width, height):
self.width = width
self.height = height
self.diagram = _create_rectangle(self.width, self.height, BLANK)

def add(self, component):
for y, row in enumerate(component.rows):
for x, char in enumerate(row):
self.diagram[y + component.y][x + component.x] = char

def save(self, filenameOrFile):
file = None if isinstance(filenameOrFile, str) else filenameOrFile
try:
if file is None:
#file = open(filenameOrFile, "w", encoding="utf-8")
file = open(filenameOrFile, "w")
for row in self.diagram:
#print "hahah"
print >>file,"".join(row)
finally:
if isinstance(filenameOrFile, str) and file is not None:
file.close()

def _create_rectangle(width, height, fill):
rows = [[fill for _ in range(width)] for _ in range(height)]
for x in range(1, width - 1):
rows[0][x] = HORIZONTAL
rows[height - 1][x] = HORIZONTAL
for y in range(1, height - 1):
rows[y][0] = VERTICAL
rows[y][width - 1] = VERTICAL
for y, x in ((0, 0), (0, width - 1), (height - 1, 0),
(height - 1, width -1)):
rows[y][x] = CORNER
return rows

class Rectangle:
def __init__(self, x, y, width, height, fill, stroke):
self.x = x
self.y = y
self.rows = _create_rectangle(width, height,
BLANK if fill == "white" else "%")

class Text:
def __init__(self, x, y, text, fontsize):
self.x = x
self.y = y
self.rows = [list(text)]

SVG_START = """<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 20010904//EN"
"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
<svg xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink" xml:space="preserve"
width="{pxwidth}px" height="{pxheight}px">"""
SVG_END = "</svg>\n"
SVG_RECTANGLE = """<rect x="{x}" y="{y}" width="{width}" \
height="{height}" fill="{fill}" stroke="{stroke}"/>"""
SVG_TEXT = """<text x="{x}" y="{y}" text-anchor="left" \
font-family="sans-serif" font-size="{fontsize}">{text}</text>"""
SVG_SCALE = 20

class SvgDiagram:

def __init__(self, width, height):
pxwidth = width * SVG_SCALE
pxheight = height * SVG_SCALE
self.diagram = [SVG_START.format(**locals())]
outline = SvgRectangle(0, 0, width, height, "lightgreen", "black")
self.diagram.append(outline.svg)

def add(self, component):
self.diagram.append(component.svg)

def save(self, filenameOrFile):
file = None if isinstance(filenameOrFile, str) else filenameOrFile
try:
if file is None:
#file = open(filenameOrFile, "w", encoding="utf-8")
file = open(filenameOrFile, "w")
file.write("\n".join(self.diagram))
file.write("\n" + SVG_END)
finally:
if isinstance(filenameOrFile, str) and file is not None:
file.close()

class SvgRectangle:
def __init__(self, x, y, width, height, fill, stroke):
x *= SVG_SCALE
y *= SVG_SCALE
width *= SVG_SCALE
height *= SVG_SCALE
self.svg = SVG_RECTANGLE.format(**locals())

class SvgText:
def __init__(self, x, y, text, fontsize):
x *= SVG_SCALE
y *= SVG_SCALE
fontsize *= SVG_SCALE // 10
self.svg = SVG_TEXT.format(**locals())

if __name__ == "__main__":
main()