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@passos /Dumper.py
Last active Apr 30, 2018

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A perl Data.Dumper clone for Python
"""
A perl Data.Dumper clone for Python
Author: simon@log4think.com
2011-07-08
Copyright 2011 Jinyu LIU
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
"""
#!/bin/env python
import sys
from types import *
def DEBUG(msg, level=None):
pass
magin_space = ' '
break_base = False
break_string = False
break_before_list_item = True
break_before_list_begin = False
break_after_list_begin = False
break_before_list_end = True
break_after_list_end = False
break_before_tuple_item = True
break_before_tuple_begin = False
break_after_tuple_begin = False
break_before_tuple_end = True
break_after_tuple_end = False
break_before_dict_key = True
break_before_dict_value = False
break_before_dict_begin = False
break_after_dict_begin = False
break_before_dict_end = True
break_after_dict_end = False
DICT_TYPES = {DictionaryType: 1}
def atomic_type (t):
return t in (NoneType, StringType, IntType, LongType, FloatType, ComplexType)
def simple_value (val):
t = type(val)
if atomic_type (val):
return True
if (not DICT_TYPES.has_key(t) and t not in (ListType, TupleType) and
not is_instance(val)):
return True
elif t in (ListType, TupleType) and len (val) <= 10:
for x in val:
if not atomic_type (type (x)):
return False
return True
elif DICT_TYPES.has_key(t) and len (val) <= 5:
for (k,v) in val.items():
if not (atomic_type (type (k)) and atomic_type (type (v))):
return False
return True
else:
return False
def is_instance (val):
if type(val) is InstanceType:
return True
# instance of extension class, but not an actual extension class
elif (hasattr(val, '__class__') and
hasattr(val, '__dict__') and
not hasattr(val, '__bases__')):
return True
else:
return False
def is_class (val):
return hasattr(val, '__bases__')
def indent(level=0, nextline=True):
if nextline:
return "\n" + magin_space*level
else:
return ""
class Dumper():
def __init__(self, max_depth=999):
self.max_depth = max_depth
self.seen = {}
def reset(self):
self.seen = {}
def dump_default(self, obj, level=0, nextline=True):
DEBUG('; dump_default')
if level + 1 > self.max_depth:
return " <%s...>" % type(obj).__class__
else:
result = "%s::%s <<" % (type(obj).__name__, obj.__class__)
if hasattr(obj, '__dict__'):
result = "%s%s__dict__ :: %s" % (
result,
indent(level+1),
self.dump_dict(obj.__dict__, level+1)
)
if isinstance(obj, dict):
result = "%s%sas_dict :: %s" % (
result,
indent(level+1),
self.dump_dict(obj, level+1)
)
elif isinstance(obj, list):
result = "%s%sas_list :: %s" % (
result,
indent(level+1),
self.dump_list(obj, level+1)
)
result = result = "%s%s>>" % (result, indent(level))
return result
def dump_base(self, obj, level=0, nextline=True):
DEBUG("; dump_%s", type(obj).__name__)
return "%s%s" % (indent(level, break_base), obj)
dump_NoneType = dump_base
dump_int = dump_base
dump_long = dump_base
dump_float = dump_base
def dump_str(self, obj, level=0, nextline=True):
DEBUG('; dump_str')
return "%s'%s'" % (indent(level, break_string), obj)
def dump_tuple(self, obj, level=0, nextline=True):
DEBUG('; dump_tuple')
if level + 1 > self.max_depth:
return "%s(...)%s" % (
indent(level, break_before_tuple_begin),
indent(level, break_after_tuple_end)
)
else:
items = ["%s%s" % (
indent(level + 1, break_before_tuple_item),
self.dump(x, level + 1)
) for x in obj
]
return "%s(%s%s%s)%s" % (
indent(level, nextline and break_before_tuple_begin),
indent(level + 1, break_after_tuple_begin), ' '.join(items),
indent(level, break_before_tuple_end),
indent(level, break_after_tuple_end)
)
def dump_list(self, obj, level=0, nextline=True):
DEBUG('; dump_list')
if level + 1 > self.max_depth:
return "%s[...]%s" % (
indent(level, break_before_list_begin),
indent(level, break_after_list_end)
)
else:
items = ["%s%s" % (
indent(level + 1, break_before_list_item),
self.dump(x, level + 1)
) for x in obj
]
return "%s[%s%s%s]%s" % (
indent(level, nextline and break_before_list_begin),
indent(level + 1, break_after_list_begin), ' '.join(items),
indent(level, break_before_list_end),
indent(level, break_after_list_end)
)
def dump_dict(self, obj, level=0, nextline=True):
DEBUG('; dump_dict')
if level + 1 > self.max_depth:
return "%s{...}%s" % (
indent(level, break_before_dict_begin),
indent(level, break_after_dict_end)
)
else:
items = ["%s%s: %s%s" % (
indent(level + 1, break_before_dict_key),
self.dump(k, level + 1),
indent(level + 2, break_before_dict_value),
self.dump(v, level + 1)
) for k, v in obj.items()
]
return "%s{%s%s%s}%s" % (
indent(level, nextline and break_before_dict_begin),
indent(level + 1, break_after_dict_begin), ' '.join(items),
indent(level, break_before_dict_end),
indent(level, break_after_dict_end)
)
def dump(self, obj, level=0, nextline=True):
DEBUG('; dump')
if not simple_value(obj):
if self.seen.has_key(id(obj)):
return "%s::%s <<...>>" % (type(obj).__name__, obj.__class__)
else:
self.seen[id(obj)] = 1
name = type(obj).__name__
dump_func = getattr(self, "dump_%s" % name, self.dump_default)
return dump_func(obj, level, nextline)
def dump(obj, max_depth=999):
d = Dumper(max_depth)
return d.dump(obj)
if __name__ == '__main__':
l1 = [3, 5, 'hello']
t1 = ('uh', 'oh')
l2 = ['foo', t1]
d1 = {'k1': 'val1',
'k2': l1,
'k2': l2}
print dump (l1)
print dump (t1)
print dump (l2)
print dump (d1)
dumper = Dumper (max_depth=1)
l = { 'author': 'joe',
'created' : '03/28/2009',
'title' : 'Yet another blog post',
'text' : 'Here is the text...',
'tags' : [ 'example', 'joe' ],
'comments' : [ { 'author': 'jim', 'comment': 'I disagree' },
{ 'author': 'nancy', 'comment': 'Good post' }
],
}
print dumper.dump (l)
dumper.reset()
dumper.max_depth = 2
print dumper.dump (l)
dumper.reset()
dumper.max_depth = None
print "max_depth: %s" % dumper.max_depth
class Foo(list): pass
class Bar(dict): pass
f = Foo ()
b = Bar ()
f.a1 = 35
f.a2 = l1
f.a3 = 'foo'
f.b = b
f.a4 = l2
b.a1 = f
b.a2 = None
b.a3 = 'bar'
print dump (f)
print dump (Dumper())
@morlandi

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@morlandi

morlandi Mar 21, 2014

Might add these::

def dump_unicode(self, obj, level=0, nextline=True):
    DEBUG('; dump_unicode')
    return  "%s'%s'" % (indent(level, break_string), obj)

def dump_bool(self, obj, level=0, nextline=True):
    DEBUG('; dump_bool')
    return  "%s%s" % (indent(level, break_string), obj)

Might add these::

def dump_unicode(self, obj, level=0, nextline=True):
    DEBUG('; dump_unicode')
    return  "%s'%s'" % (indent(level, break_string), obj)

def dump_bool(self, obj, level=0, nextline=True):
    DEBUG('; dump_bool')
    return  "%s%s" % (indent(level, break_string), obj)
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