本文整理汇总了Python中reader.Reader.get_sexpr方法的典型用法代码示例。如果您正苦于以下问题：Python Reader.get_sexpr方法的具体用法？Python Reader.get_sexpr怎么用？Python Reader.get_sexpr使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类reader.Reader的用法示例。
在下文中一共展示了Reader.get_sexpr方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: Elisp
# 需要导入模块: from reader import Reader [as 别名]
# 或者: from reader.Reader import get_sexpr [as 别名]
class Elisp(Lisp):
def __init__(self):
self.stdin = sys.stdin
self.stdout = sys.stdout
self.stderr = sys.stderr
self.debug = False
self.verbose = True
self.core = True
self.closure = True
self.reader = Reader()
self.env = Environment()
self.init()
def init(self):
# core functions
self.env.set('eq', Function(self.eq))
self.env.set('quote', Function(self.quote))
self.env.set('car', Function(self.car))
self.env.set('cdr', Function(self.cdr))
self.env.set('cons', Function(self.cons))
self.env.set('atom', Function(self.atom))
self.env.set('cond', Function(self.cond))
# utility functions
self.env.set('print', Function(self.println))
# special forms
self.env.set('lambda', Function(self.lambda_fun))
self.env.set('label', Function(self.label))
# meta-elements
self.env.set('__elisp__', self)
self.env.set('__global__', self.env)
def lambda_fun(self, env, args):
if self.env != env.get('__global__') and self.closure:
return Closure(env, args[0], args[1:])
else:
return Lambda(args[0], args[1:])
def usage(self):
self.print_banner()
print ('%s <options> [elisp files]\n' % NAME.lower())
def print_banner(self):
print ('The %s programming shell %s' % (NAME, VERSION))
print (' Type `help` for more information\n')
def print_help(self):
print ('Help for eLisp %s' % VERSION)
print (' Type `help` for more information')
print (' Type `env` to see the bindings in current environment')
print (' Type `load` followed by one or more filenames to load source files')
print (' Type `quit` to exit the interpreter')
def push(self, env=None):
if env:
self.env = self.env.push(env)
else:
self.env = self.env.push()
def pop(self):
self.env = self.env.pop()
def repl(self):
while True:
source = self.get_complete_command()
try:
if source in ['quit']:
break
elif source in ['help']:
self.print_help()
elif source.startswith('load'):
files = source.split(' ')[1:]
self.process_files(files)
elif source in ['env']:
print (self.env)
else:
self.process(source)
except AttributeError:
print ('Could not process command: ', source)
return
def process(self, source):
sexpr = self.reader.get_sexpr(source)
while sexpr:
result = None
try:
result = self.eval(sexpr)
except Error as err:
print (err)
if self.verbose:
self.stdout.write(' %s\n' % result)
#.........这里部分代码省略.........
示例2: Lithp
# 需要导入模块: from reader import Reader [as 别名]
# 或者: from reader.Reader import get_sexpr [as 别名]
class Lithp(Lisp):
""" The Lithper class is the interpreter driver. It does the following:
1. Initialize the global environment
2. Parse the cl arguments and act on them as appropriate
3. Initialize the base Lisp functions
4. Read input
5. Evaluate
6. Print
7. Loop back to #4
"""
def __init__( self):
iostreams=(sys.stdin, sys.stdout, sys.stderr)
(self.stdin, self.stdout, self.stderr) = iostreams
self.verbose = False
self.core = True
self.closures = True
self.rdr = Reader()
self.environment = Environment()
self.init()
def init(self):
# Define core functions
self.environment.set("eq", Function(self.eq))
self.environment.set("quote", Function(self.quote))
self.environment.set("car", Function(self.car))
self.environment.set("cdr", Function(self.cdr))
self.environment.set("cons", Function(self.cons))
self.environment.set("atom", Function(self.atom))
self.environment.set("cond", Function(self.cond))
# Define utility function
self.environment.set("print", Function(self.println))
# Special forms
self.environment.set("lambda", Function(self.lambda_))
self.environment.set("label", Function(self.label))
# Define meta-elements
self.environment.set("__lithp__", self)
self.environment.set("__global__", self.environment)
def usage(self):
self.print_banner()
print
print NAME.lower(), " <options> [lithp files]\n"
def print_banner(self):
print "The", NAME, "programming shell", VERSION
print " by Fogus,", WWW
print " Type :help for more information"
print
def print_help(self):
print "Help for Lithp v", VERSION
print " Type :help for more information"
print " Type :env to see the bindings in the current environment"
print " Type :load followed by one or more filenames to load source files"
print " Type :quit to exit the interpreter"
def push(self, env=None):
if env:
self.environment = self.environment.push(env)
else:
self.environment = self.environment.push()
def pop(self):
self.environment = self.environment.pop()
def repl(self):
while True:
# Stealing the s-expression parsing approach from [CLIPS](http://clipsrules.sourceforge.net/)
source = self.get_complete_command()
# Check for any REPL directives
try:
if source in [":quit"]:
break
elif source in [":help"]:
self.print_help()
elif source.startswith(":load"):
files = source.split(" ")[1:]
self.process_files(files)
elif source in [":env"]:
print(self.environment)
else:
self.process(source)
except AttributeError:
print "Could not process command: ", source
return
# Source is processed one s-expression at a time.
def process(self, source):
sexpr = self.rdr.get_sexpr(source)
while sexpr:
result = None
#.........这里部分代码省略.........