我有一组对象,我正在创建一个类,我想要将每个对象存储为自己的文本文件.我真的希望将其存储为一个
Python类定义,它会分类我正在创建的主类.所以,我做了一些戳,并在effbot.org上找到了一个Python代码生成器.我做了一些实验,这里是我想出来的：
#
# a Python code generator backend
#
# fredrik lundh, march 1998
#
# fredrik@pythonware.com
# http://www.pythonware.com
#
# Code taken from http://effbot.org/zone/python-code-generator.htm
import sys, string
class CodeGeneratorBackend:
def begin(self, tab="\t"):
self.code = []
self.tab = tab
self.level = 0
def end(self):
return string.join(self.code, "")
def write(self, string):
self.code.append(self.tab * self.level + string)
def indent(self):
self.level = self.level + 1
def dedent(self):
if self.level == 0:
raise SyntaxError, "internal error in code generator"
self.level = self.level - 1
class Point():
"""Defines a Point. Has x and y."""
def __init__(self, x, y):
self.x = x
self.y = y
def dump_self(self, filename):
self.c = CodeGeneratorBackend()
self.c.begin(tab=" ")
self.c.write("class {0}{1}Point()\n".format(self.x,self.y))
self.c.indent()
self.c.write('"""Defines a Point. Has x and y"""\n')
self.c.write('def __init__(self, x={0}, y={1}):\n'.format(self.x, self.y))
self.c.indent()
self.c.write('self.x = {0}\n'.format(self.x))
self.c.write('self.y = {0}\n'.format(self.y))
self.c.dedent()
self.c.dedent()
f = open(filename,'w')
f.write(self.c.end())
f.close()
if __name__ == "__main__":
p = Point(3,4)
p.dump_self('demo.py')
感觉真的很丑,是否有更清洁/更好/更多/更多的pythonic方式来做到这一点？请注意,这不是我真的打算这样做的课程,这是一个小班,我可以很容易地模拟不要太多的行.此外,子类不需要在其中具有生成函数,如果我再次需要,我可以从超类调用代码生成器.
