diff options
author | Ori Bernstein <ori@eigenstate.org> | 2021-06-14 00:00:37 +0000 |
---|---|---|
committer | Ori Bernstein <ori@eigenstate.org> | 2021-06-14 00:00:37 +0000 |
commit | a73a964e51247ed169d322c725a3a18859f109a3 (patch) | |
tree | 3f752d117274d444bda44e85609aeac1acf313f3 /sys/lib/python/pprint.py | |
parent | e64efe273fcb921a61bf27d33b230c4e64fcd425 (diff) |
python, hg: tow outside the environment.
they've served us well, and can ride off into the sunset.
Diffstat (limited to 'sys/lib/python/pprint.py')
-rw-r--r-- | sys/lib/python/pprint.py | 315 |
1 files changed, 0 insertions, 315 deletions
diff --git a/sys/lib/python/pprint.py b/sys/lib/python/pprint.py deleted file mode 100644 index 19a3dc249..000000000 --- a/sys/lib/python/pprint.py +++ /dev/null @@ -1,315 +0,0 @@ -# Author: Fred L. Drake, Jr. -# fdrake@acm.org -# -# This is a simple little module I wrote to make life easier. I didn't -# see anything quite like it in the library, though I may have overlooked -# something. I wrote this when I was trying to read some heavily nested -# tuples with fairly non-descriptive content. This is modeled very much -# after Lisp/Scheme - style pretty-printing of lists. If you find it -# useful, thank small children who sleep at night. - -"""Support to pretty-print lists, tuples, & dictionaries recursively. - -Very simple, but useful, especially in debugging data structures. - -Classes -------- - -PrettyPrinter() - Handle pretty-printing operations onto a stream using a configured - set of formatting parameters. - -Functions ---------- - -pformat() - Format a Python object into a pretty-printed representation. - -pprint() - Pretty-print a Python object to a stream [default is sys.stdout]. - -saferepr() - Generate a 'standard' repr()-like value, but protect against recursive - data structures. - -""" - -import sys as _sys - -from cStringIO import StringIO as _StringIO - -__all__ = ["pprint","pformat","isreadable","isrecursive","saferepr", - "PrettyPrinter"] - -# cache these for faster access: -_commajoin = ", ".join -_id = id -_len = len -_type = type - - -def pprint(object, stream=None, indent=1, width=80, depth=None): - """Pretty-print a Python object to a stream [default is sys.stdout].""" - printer = PrettyPrinter( - stream=stream, indent=indent, width=width, depth=depth) - printer.pprint(object) - -def pformat(object, indent=1, width=80, depth=None): - """Format a Python object into a pretty-printed representation.""" - return PrettyPrinter(indent=indent, width=width, depth=depth).pformat(object) - -def saferepr(object): - """Version of repr() which can handle recursive data structures.""" - return _safe_repr(object, {}, None, 0)[0] - -def isreadable(object): - """Determine if saferepr(object) is readable by eval().""" - return _safe_repr(object, {}, None, 0)[1] - -def isrecursive(object): - """Determine if object requires a recursive representation.""" - return _safe_repr(object, {}, None, 0)[2] - -class PrettyPrinter: - def __init__(self, indent=1, width=80, depth=None, stream=None): - """Handle pretty printing operations onto a stream using a set of - configured parameters. - - indent - Number of spaces to indent for each level of nesting. - - width - Attempted maximum number of columns in the output. - - depth - The maximum depth to print out nested structures. - - stream - The desired output stream. If omitted (or false), the standard - output stream available at construction will be used. - - """ - indent = int(indent) - width = int(width) - assert indent >= 0, "indent must be >= 0" - assert depth is None or depth > 0, "depth must be > 0" - assert width, "width must be != 0" - self._depth = depth - self._indent_per_level = indent - self._width = width - if stream is not None: - self._stream = stream - else: - self._stream = _sys.stdout - - def pprint(self, object): - self._format(object, self._stream, 0, 0, {}, 0) - self._stream.write("\n") - - def pformat(self, object): - sio = _StringIO() - self._format(object, sio, 0, 0, {}, 0) - return sio.getvalue() - - def isrecursive(self, object): - return self.format(object, {}, 0, 0)[2] - - def isreadable(self, object): - s, readable, recursive = self.format(object, {}, 0, 0) - return readable and not recursive - - def _format(self, object, stream, indent, allowance, context, level): - level = level + 1 - objid = _id(object) - if objid in context: - stream.write(_recursion(object)) - self._recursive = True - self._readable = False - return - rep = self._repr(object, context, level - 1) - typ = _type(object) - sepLines = _len(rep) > (self._width - 1 - indent - allowance) - write = stream.write - - if sepLines: - r = getattr(typ, "__repr__", None) - if issubclass(typ, dict) and r is dict.__repr__: - write('{') - if self._indent_per_level > 1: - write((self._indent_per_level - 1) * ' ') - length = _len(object) - if length: - context[objid] = 1 - indent = indent + self._indent_per_level - items = object.items() - items.sort() - key, ent = items[0] - rep = self._repr(key, context, level) - write(rep) - write(': ') - self._format(ent, stream, indent + _len(rep) + 2, - allowance + 1, context, level) - if length > 1: - for key, ent in items[1:]: - rep = self._repr(key, context, level) - write(',\n%s%s: ' % (' '*indent, rep)) - self._format(ent, stream, indent + _len(rep) + 2, - allowance + 1, context, level) - indent = indent - self._indent_per_level - del context[objid] - write('}') - return - - if (issubclass(typ, list) and r is list.__repr__) or \ - (issubclass(typ, tuple) and r is tuple.__repr__): - if issubclass(typ, list): - write('[') - endchar = ']' - else: - write('(') - endchar = ')' - if self._indent_per_level > 1: - write((self._indent_per_level - 1) * ' ') - length = _len(object) - if length: - context[objid] = 1 - indent = indent + self._indent_per_level - self._format(object[0], stream, indent, allowance + 1, - context, level) - if length > 1: - for ent in object[1:]: - write(',\n' + ' '*indent) - self._format(ent, stream, indent, - allowance + 1, context, level) - indent = indent - self._indent_per_level - del context[objid] - if issubclass(typ, tuple) and length == 1: - write(',') - write(endchar) - return - - write(rep) - - def _repr(self, object, context, level): - repr, readable, recursive = self.format(object, context.copy(), - self._depth, level) - if not readable: - self._readable = False - if recursive: - self._recursive = True - return repr - - def format(self, object, context, maxlevels, level): - """Format object for a specific context, returning a string - and flags indicating whether the representation is 'readable' - and whether the object represents a recursive construct. - """ - return _safe_repr(object, context, maxlevels, level) - - -# Return triple (repr_string, isreadable, isrecursive). - -def _safe_repr(object, context, maxlevels, level): - typ = _type(object) - if typ is str: - if 'locale' not in _sys.modules: - return repr(object), True, False - if "'" in object and '"' not in object: - closure = '"' - quotes = {'"': '\\"'} - else: - closure = "'" - quotes = {"'": "\\'"} - qget = quotes.get - sio = _StringIO() - write = sio.write - for char in object: - if char.isalpha(): - write(char) - else: - write(qget(char, repr(char)[1:-1])) - return ("%s%s%s" % (closure, sio.getvalue(), closure)), True, False - - r = getattr(typ, "__repr__", None) - if issubclass(typ, dict) and r is dict.__repr__: - if not object: - return "{}", True, False - objid = _id(object) - if maxlevels and level > maxlevels: - return "{...}", False, objid in context - if objid in context: - return _recursion(object), False, True - context[objid] = 1 - readable = True - recursive = False - components = [] - append = components.append - level += 1 - saferepr = _safe_repr - for k, v in sorted(object.items()): - krepr, kreadable, krecur = saferepr(k, context, maxlevels, level) - vrepr, vreadable, vrecur = saferepr(v, context, maxlevels, level) - append("%s: %s" % (krepr, vrepr)) - readable = readable and kreadable and vreadable - if krecur or vrecur: - recursive = True - del context[objid] - return "{%s}" % _commajoin(components), readable, recursive - - if (issubclass(typ, list) and r is list.__repr__) or \ - (issubclass(typ, tuple) and r is tuple.__repr__): - if issubclass(typ, list): - if not object: - return "[]", True, False - format = "[%s]" - elif _len(object) == 1: - format = "(%s,)" - else: - if not object: - return "()", True, False - format = "(%s)" - objid = _id(object) - if maxlevels and level > maxlevels: - return format % "...", False, objid in context - if objid in context: - return _recursion(object), False, True - context[objid] = 1 - readable = True - recursive = False - components = [] - append = components.append - level += 1 - for o in object: - orepr, oreadable, orecur = _safe_repr(o, context, maxlevels, level) - append(orepr) - if not oreadable: - readable = False - if orecur: - recursive = True - del context[objid] - return format % _commajoin(components), readable, recursive - - rep = repr(object) - return rep, (rep and not rep.startswith('<')), False - - -def _recursion(object): - return ("<Recursion on %s with id=%s>" - % (_type(object).__name__, _id(object))) - - -def _perfcheck(object=None): - import time - if object is None: - object = [("string", (1, 2), [3, 4], {5: 6, 7: 8})] * 100000 - p = PrettyPrinter() - t1 = time.time() - _safe_repr(object, {}, None, 0) - t2 = time.time() - p.pformat(object) - t3 = time.time() - print "_safe_repr:", t2 - t1 - print "pformat:", t3 - t2 - -if __name__ == "__main__": - _perfcheck() |