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- from __future__ import unicode_literals
- import sys
- import ast
- import six
-
-
- class Printer(ast.NodeVisitor):
-
- def __init__(self, file=sys.stdout, indent=" "):
- self.indentation = 0
- self.indent_with = indent
- self.f = file
-
- # overridden to make the API obvious
- def visit(self, node):
- super(Printer, self).visit(node)
-
- def write(self, text):
- self.f.write(six.text_type(text))
-
- def generic_visit(self, node):
-
- if isinstance(node, list):
- nodestart = "["
- nodeend = "]"
- children = [("", child) for child in node]
- else:
- nodestart = type(node).__name__ + "("
- nodeend = ")"
- children = [(name + "=", value) for name, value in ast.iter_fields(node)]
-
- if len(children) > 1:
- self.indentation += 1
-
- self.write(nodestart)
- for i, pair in enumerate(children):
- attr, child = pair
- if len(children) > 1:
- self.write("\n" + self.indent_with * self.indentation)
- if isinstance(child, (ast.AST, list)):
- self.write(attr)
- self.visit(child)
- else:
- self.write(attr + repr(child))
-
- if i != len(children) - 1:
- self.write(",")
- self.write(nodeend)
-
- if len(children) > 1:
- self.indentation -= 1
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