rospy.rostime.Duration

Class Duration

object --+ | roslib.rostime.TVal --+ | roslib.rostime.Duration --+ | Duration

Duration represents the ROS 'duration' primitive type, which consists of two integers: seconds and nanoseconds. The Duration class allows you to add and subtract Duration instances, including adding and subtracting from Time instances.

Usage:

five_seconds = Duration(5) five_nanoseconds = Duration(0, 5) print 'Fields are', five_seconds.secs, five_seconds.nsecs # Duration arithmetic ten_seconds = five_seconds + five_seconds five_secs_ago = rospy.Time.now() - five_seconds # Time minus Duration is a Time true_val = ten_second > five_seconds

Instance Methods

__init__(self, secs=0, nsecs=0)
Create new Duration instance.

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Duration

__abs__(self)
Absolute value of this duration (Inherited from roslib.rostime.Duration)

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__add__(self, other)
Add duration to this duration, or this duration to a time, creating a new time value as a result. (Inherited from roslib.rostime.Duration)

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__cmp__(self, other) (Inherited from roslib.rostime.Duration)

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Duration

__div__(self, val)
Divide this duration by an integer or float (Inherited from roslib.rostime.Duration)

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__eq__(self, other) (Inherited from roslib.rostime.Duration)

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Duration

__floordiv__(self, val)
Floor divide this duration by an integer or float (Inherited from roslib.rostime.Duration)

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__ge__(self, other)
>= test for time values (Inherited from roslib.rostime.TVal)

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__getstate__(self)
support for Python pickling (Inherited from roslib.rostime.Duration)

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__gt__(self, other)
> test for time values (Inherited from roslib.rostime.TVal)

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__hash__(self)
Time values are hashable. (Inherited from roslib.rostime.TVal)

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__le__(self, other)
<= test for time values (Inherited from roslib.rostime.TVal)

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__lt__(self, other)
< test for time values (Inherited from roslib.rostime.TVal)

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Duration

__mul__(self, val)
Multiply this duration by an integer or float (Inherited from roslib.rostime.Duration)

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__ne__(self, other) (Inherited from roslib.rostime.TVal)

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Duration

__neg__(self)
Returns: Negative value of this duration (Inherited from roslib.rostime.Duration)

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__nonzero__(self)
Check if time value is zero (Inherited from roslib.rostime.TVal)

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__repr__(self)
repr(x) (Inherited from roslib.rostime.Duration)

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__setstate__(self, state)
support for Python pickling (Inherited from roslib.rostime.Duration)

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__str__(self)
str(x) (Inherited from roslib.rostime.TVal)

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__sub__(self, other)
Subtract duration from this duration, returning a new duration (Inherited from roslib.rostime.Duration)

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Duration

__truediv__(self, val)
Divide this duration by an integer or float (Inherited from roslib.rostime.Duration)

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canon(self)
Canonicalize the field representation in this instance. (Inherited from roslib.rostime.TVal)

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bool

is_zero(self)
Returns: True if time is zero (secs and nsecs are zero) (Inherited from roslib.rostime.TVal)

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set(self, secs, nsecs)
Set time using separate secs and nsecs values (Inherited from roslib.rostime.TVal)

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long

to_nsec(self)
Returns: time as nanoseconds (Inherited from roslib.rostime.TVal)

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float

to_sec(self)
Returns: time as float seconds (same as time.time() representation) (Inherited from roslib.rostime.TVal)

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Inherited from object: __delattr__, __format__, __getattribute__, __new__, __reduce__, __reduce_ex__, __setattr__, __sizeof__, __subclasshook__

Static Methods

Duration

from_sec(float_seconds)
Create new Duration instance from float seconds format. (Inherited from roslib.rostime.Duration)

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Properties

nsecs (Inherited from roslib.rostime.Duration)

secs (Inherited from roslib.rostime.Duration)

Inherited from object: __class__

Method Details

init(self, secs=0, nsecs=0)
(Constructor)

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Create new Duration instance. secs and nsecs are integers and correspond to the ROS 'duration' primitive type.

Parameters:

secs (int) - seconds
nsecs (int) - nanoseconds

Overrides: object.__init__

Class Duration

__init__(self, secs=0, nsecs=0) (Constructor)

init(self, secs=0, nsecs=0)
(Constructor)