= 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 self._depth and level > self._depth:
write(rep)
return
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 = _sorted(object.items())
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)
if sepLines:
write(',\n%s%s: ' % (' '*indent, rep))
else:
write(', %s: ' % 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__) or
(issubclass(typ, set) and r is set.__repr__) or
(issubclass(typ, frozenset) and r is frozenset.__repr__)
):
length = _len(object)
if issubclass(typ, list):
write('[')
endchar = ']'
elif issubclass(typ, set):
if not length:
write('set()')
return
write('set([')
endchar = '])'
object = _sorted(object)
indent += 4
elif issubclass(typ, frozenset):
if not length:
write('frozenset()')
return
write('frozenset([')
endchar = '])'
object = _sorted(object)
indent += 10
else:
write('(')
endchar = ')'
if self._indent_per_level > 1 and sepLines:
write((self._indent_per_level - 1) * ' ')
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:]:
if sepLines:
write(',\n' + ' '*indent)
else:
write(', ')
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 (""
% (_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()