baseobj (3) - Linux Manuals
baseobj: Base object
NAME
baseobj - Base objectDESCRIPTION
Base class so objects will inherit the methods providing the string representation of the object and methods to change the verbosity of such string representation. It also includes a simple debug printing and logging mechanism including methods to change the debug verbosity level and methods to add debug levels.
CLASSES
class BaseObj(__builtin__.object)
Base class so objects will inherit the methods providing the string
representation of the object and a simple debug printing and logging
mechanism.
Usage:
from baseobj import BaseObj
# Named arguments
x = BaseObj(a=1, b=2)
# Dictionary argument
x = BaseObj({'a':1, 'b':2})
# Tuple arguments: first for keys and second for the values
x = BaseObj(['a', 'b'], [1, 2])
# All of the above will create an object having two attributes:
x.a = 1 and x.b = 2
# Add attribute name, this will be the only attribute to be displayed
x.set_attrlist("a")
# Add list of attribute names to be displayed in that order
x.set_attrlist(["a", "b"])
# Set attribute with ordered display rights
x.set_attr("a", 1)
# This is the same as
setattr(x, "a", 1) or x.a = 1
x.set_attrlist("a")
# Set attribute with switch duplicate
# The following creates an extra attribute "switch" with
# the same value as attribute "a":
# x.a == x.switch
# x.a is x.switch
x.set_attr("a", 1, switch=True)
# Make the current object flat by allowing all the attributes
# for the new attribute to be accessed directly by the current
# object so the following is True:
# x.d == x.c.d
x.set_attr("c", BaseObj(d=11, e=22), switch=True)
# Set the comparison attribute so x == x.a is True
x.set_eqattr("a")
# Set verbose level of object's string representation
x.debug_repr(level)
# Set string format for verbose level 1
x.set_strfmt(1, "arg1:{0}")
# In the above example the first positional argument is "a"
# so the str(x) gives "arg1:1"
# Set attribute shared by all instances
# If a global or shared attribute is set on one instance,
# all other instances will have access to it:
# y = BaseObj(d=2, e=3)
# then the following is true
# x.g == y.g
# x.g is y.g
x.set_global("g", 5)
# Set level mask to display all debug messages matching mask
x.debug_level(0xFF)
# Add a debug mapping for mask 0x100
x.debug_map(0x100, 'opts', "OPTS: ")
# Set global indentation to 4 spaces for dprint
x.dindent(4)
# Set global indentation to 4 spaces for displaying objects
x.sindent(4)
# Set global truncation to 64 for displaying string objects
x.strsize(64)
# Do not display timestamp for dprint messages
x.tstamp(enable=False)
# Change timestamp format to include the date
x.tstamp(fmt="{0:date:%Y-%m-%d %H:%M:%S.%q} ")
# Get timestamp if enabled, else return an empty string
out = x.timestamp()
# Open log file
x.open_log(logfile)
# Close log file
x.close_log()
# Write data to log file
x.write_log(data)
# Format the given arguments
out = x.format("{0:x} - {1}", 1, "hello")
# Format the object attributes set by set_attrlist()
out = x.format("{0:x} - {1}")
# Print debug message only if OPTS bitmap matches the current
# debug level mask
x.dprint("OPTS", "This is an OPTS debug message")
Methods defined here:
---------------------
__eq__(self, other)
Comparison method: this object is treated like the attribute
defined by set_eqattr()
__getattr__(self, attr)
Return the attribute value for which the lookup has not found
the attribute in the usual places. It checks the internal
dictionary for any attribute references, it checks if this
is a flat object and returns the appropriate attribute.
And finally, if any of the attributes listed in _attrlist
does not exist it returns None as if they exist but not
defined
__init__(self, *kwts, **kwds)
Constructor
Initialize object's private data according to the arguments given.
Arguments can be given as positional, named arguments or a
combination of both.
__ne__(self, other)
Comparison method: this object is treated like the attribute
defined by set_eqattr()
__repr__(self)
String representation of object
The representation depends on the verbose level set by debug_repr().
If set to 0 the generic object representation is returned, else
the representation of the object includes all object attributes
and their values with proper indentation.
__str__(self)
Informal string representation of object
The representation depends on the verbose level set by debug_repr().
If set to 0 the generic object representation is returned, else
the representation of the object includes all object attributes
and their values.
close_log(self)
Close log file.
debug_level(self, level=0)
Set debug level mask.
- level:
- Level to set. This could be a number or a string expression of names defined by debug_map()
- Examples: # Set level x.debug_level(0xFF) # Set level using expression x.debug_level('all') x.debug_level('debug ^ 1')
- fmt:
- String format to use for the arguments, where {0}, {1}, etc. are used for positional arguments and {name1}, {name2}, etc. are used for named arguments given after fmt.
- name:
- Attribute name
- value:
- Attribute value
- attr:
- Name or list of names to add to the list of attribute names to display
- attr:
- Attribute to use for object comparison
- Examples: x = BaseObj(a=1, b=2) x.set_eqattr("a") x == 1 will return True, the same as x.a == 1
- level:
- Display level given as a first argument
- format:
- String format for given display level, given as a second argument
- level:
- Level of verbosity to set
- Examples: # Set verbose level to its minimal object representation x.debug_repr(0) # Object representation is a bit more verbose x.debug_repr(1) # Object representation is a lot more verbose x.debug_repr(2)
- fmt:
- Timestamp format, default is given by the format set by tstamp()
- enable:
- Boolean to enable/disable timestamps
- fmt:
- Set timestamp format
BUGS
No known bugs.AUTHOR
Jorge Mora (mora [at] netapp.com)