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Description:

astprettier 0.1.2

astprettier

Pretty print Python AST nodes, the return value of ast.parse
Note: This is a fork of astpretty. The goals of this fork are:

Adding more advanced features that go beyond the REPL scope of astpretty
Refactoring and cleanup to make the very small code base easier to understand and maintain
Experimentation with Python packaging to make the project directory more beautiful and have less boilerplate

Installation
pip install astprettier
Usage
REPL
astprettier provides two main functions:
astprettier.format(node, indent_level=0, indent=' ', show_offsets=True, ns_prefix='')
astprettier.print(node, indent_level=0, indent=' ', show_offsets=True, ns_prefix='')
astprettier.print is a thin wrapper around astprettier.format that just writes the output of format to sys.stdout
>>> import ast, astprettier
>>> astprettier.print(ast.parse('if x == y: y += 4').body[0])
If(
lineno=1,
col_offset=0,
test=Compare(
lineno=1,
col_offset=3,
left=Name(lineno=1, col_offset=3, id='x', ctx=Load()),
ops=[Eq()],
comparators=[Name(lineno=1, col_offset=8, id='y', ctx=Load())],
),
body=[
AugAssign(
lineno=1,
col_offset=11,
target=Name(lineno=1, col_offset=11, id='y', ctx=Store()),
op=Add(),
value=Num(lineno=1, col_offset=16, n=4),
),
],
orelse=[],
)

>>> # Comparison with ast.dump()
>>> ast.dump(ast.parse('if x == y: y += 4').body[0])
"If(test=Compare(left=Name(id='x', ctx=Load()), ops=[Eq()], comparators=[Name(id='y', ctx=Load())]), body=[AugAssign(target=Name(id='y', ctx=Store()), op=Add(), value=Constant(value=4))], orelse=[])"

ns_prefix controls whether objects from the ast module will be prefixed with your ast namespace:
>>> astprettier.print(ast.parse('x += 5').body[0], show_offsets=False, ns_prefix='ast')
ast.AugAssign(
target=ast.Name(id='x', ctx=ast.Store()),
op=ast.Add(),
value=ast.Num(n=5),
)

Console
On console, you can either pass Python syntax via STDIN or provide a filename.
$ astprettier -h
usage: astprettier.py [-h] [--show-offsets] [-n] [-i INDENT] [-l INDENT_LEVEL] [-p NS_PREFIX] [-c] filename

positional arguments:
filename

optional arguments:
-h, --help show this help message and exit
--show-offsets
-n, --no-show-offsets
-i INDENT, --indent INDENT
-l INDENT_LEVEL, --level INDENT_LEVEL
-p NS_PREFIX, --ns-prefix NS_PREFIX
-c, --colorize

astprettier can optionally colorize the console output with pygments.
$ echo 'x=1' | astprettier -c

Contributing
We love contributions!
astprettier is open source, built on open source, and we'd love to have you hang out in our community.