From fba9bc28fc781dbd29bdada12cd0f3dcca1caf68 Mon Sep 17 00:00:00 2001
From: Sichao He <1310722434@qq.com>
Date: Sun, 22 Dec 2024 11:14:22 +0800
Subject: [PATCH 1/4] Add more constants (`Unit`)

---
 brainunit/_unit_constants.py | 112 +++++++++++++++++++++++++++++++----
 1 file changed, 101 insertions(+), 11 deletions(-)

diff --git a/brainunit/_unit_constants.py b/brainunit/_unit_constants.py
index ae5e9da..cbf4666 100644
--- a/brainunit/_unit_constants.py
+++ b/brainunit/_unit_constants.py
@@ -14,7 +14,34 @@
 # ==============================================================================
 
 from ._base import Unit
-from ._unit_common import joule, kilogram, second, meter
+from ._unit_common import joule, kilogram, second, meter, radian, pascal, meter2, meter3, kelvin, watt, newton
+from .math import pi
+
+# ----- Mass -----
+metric_ton = Unit.create(kilogram.dim, name="metric ton", dispname="t", scale=kilogram.scale + 3)
+grain = Unit.create(kilogram.dim, name="grain", dispname="gr", scale=kilogram.scale - 5, factor=6.479891)
+lb = pound = Unit.create(kilogram.dim, name="pound", dispname="lb", scale=kilogram.scale, factor=0.45359237)
+slinch = blob = Unit.create(kilogram.dim, name="blob", dispname="blob", scale=kilogram.scale + 2, factor=1.75126836)
+slug = Unit.create(kilogram.dim, name="slug", dispname="slug", scale=kilogram.scale + 1, factor=1.459390294)
+oz = ounce = Unit.create(kilogram.dim, name="ounce", dispname="oz", scale=kilogram.scale - 2, factor=2.8349523125)
+stone = Unit.create(kilogram.dim, name="stone", dispname="st", scale=kilogram.scale, factor=6.35029318)
+long_ton = Unit.create(kilogram.dim, name="long ton", dispname="long ton", scale=kilogram.scale + 3,
+                       factor=1.0160469088)
+short_ton = Unit.create(kilogram.dim, name="short ton", dispname="short ton", scale=kilogram.scale + 3,
+                        factor=0.90718474)
+troy_ounce = Unit.create(kilogram.dim, name="troy ounce", dispname="oz t", scale=kilogram.scale - 2, factor=3.11034768)
+troy_pound = Unit.create(kilogram.dim, name="troy pound", dispname="lb t", scale=kilogram.scale, factor=0.3732417216)
+carat = Unit.create(kilogram.dim, name="carat", dispname="ct", scale=kilogram.scale - 4, factor=2.)
+# atomic mass unit (amu)
+atomic_mass = u = um_u = Unit.create(kilogram.dim, name="atomic mass unit", dispname="u", scale=kilogram.scale - 27,
+                                     factor=1.66053886)
+
+# ----- Angle -----
+degree = Unit.create(radian.dim, name="degree", dispname="°", scale=radian.scale, factor=pi / 180)
+arcmin = arcminute = Unit.create(radian.dim, name="arcminute", dispname="′", scale=radian.scale - 4,
+                                 factor=2.908882086657216)
+arcsec = arcsecond = Unit.create(radian.dim, name="arcsecond", dispname="″", scale=radian.scale - 6,
+                                 factor=4.84813681109536)
 
 # ----- Time -----
 
@@ -40,20 +67,83 @@
                           factor=1.6093472186944374)
 nautical_mile = Unit.create(meter.dim, name="nautical mile", dispname="nmi", scale=meter.scale + 3, factor=1.8520)
 fermi = Unit.create(meter.dim, name="fermi", dispname="fm", scale=meter.scale - 15)
-angstrom = Unit.create(meter.dim, name="angstrom", dispname="Å", scale=-10, factor=1.0)
-micron = Unit.create(meter.dim, name="micron", dispname="µm", scale=-6, factor=1.0e-6)
-astronomical_unit = Unit.create(meter.dim, name="astronomical unit", dispname="AU", scale=11, factor=1.495978707e11)
-light_year = Unit.create(meter.dim / second.dim, name="light year", dispname="ly", scale=11, factor=1.094991952845)
+angstrom = Unit.create(meter.dim, name="angstrom", dispname="Å", scale=meter.scale - 10, factor=1.0)
+micron = Unit.create(meter.dim, name="micron", dispname="µm", scale=meter.scale - 6, factor=1.0e-6)
+au = astronomical_unit = Unit.create(meter.dim, name="astronomical unit", dispname="AU", scale=meter.scale + 11,
+                                     factor=1.495978707e11)
+light_year = Unit.create(meter.dim, name="light year", dispname="ly", scale=meter.scale + 15, factor=9.460730777119564)
+parsec = Unit.create(meter.dim, name="parsec", dispname="pc", scale=meter.scale + 16, factor=3.085677581491367e16)
+
+# ----- Pressure -----
+atm = atmosphere = Unit.create(pascal.dim, name="atmosphere", dispname="atm", scale=meter.scale + 5, factor=1.013249966)
+bar = Unit.create(pascal.dim, name="bar", dispname="bar", scale=meter.scale + 5, factor=1.)
+mmHg = torr = Unit.create(pascal.dim, name="torr", dispname="torr", scale=meter.scale + 2, factor=1.3332236842105263)
+psi = Unit.create(pascal.dim, name="pound per square inch", dispname="psi", scale=meter.scale + 3,
+                  factor=6.894757293168361)
+
+# ----- Area -----
+hectare = Unit.create(meter2.dim, name="hectare", dispname="ha", scale=meter2.scale + 4, factor=1.)
+acre = Unit.create(meter2.dim, name="acre", dispname="acre", scale=meter2.scale + 3, factor=4.046864798)
+
+# ----- Volume -----
+gallon = gallon_US = Unit.create(meter3.dim, name="gallon", dispname="gal", scale=meter3.scale - 3, factor=3.785411784)
+gallon_imp = Unit.create(meter3.dim, name="imperial gallon", dispname="gal", scale=meter3.scale - 3, factor=4.54609)
+fluid_ounce = fluid_ounce_US = Unit.create(meter3.dim, name="fluid ounce", dispname="fl oz", scale=meter3.scale - 5,
+                                           factor=2.95735295625)
+fluid_ounce_imp = Unit.create(meter3.dim, name="imperial fluid ounce", dispname="fl oz imp", scale=meter3.scale - 5,
+                              factor=2.84130742)
+bbl = barrel = Unit.create(meter3.dim, name="barrel", dispname="bbl", scale=meter3.scale + 2, factor=1.5898729493)
+
+# ----- Speed -----
+speed_unit = meter / second
+kmh = Unit.create(speed_unit.dim, name="kilometer per hour", dispname="km/h", scale=speed_unit.scale - 1,
+                  factor=2.77777778)
+mph = Unit.create(speed_unit.dim, name="mile per hour", dispname="mph", scale=speed_unit.scale - 1, factor=4.4704)
+mach = speed_of_sound = Unit.create(speed_unit.dim, name="speed of sound", dispname="mach", scale=speed_unit.scale + 2,
+                                    factor=3.4029)
+knot = Unit.create(speed_unit.dim, name="knot", dispname="kn", scale=speed_unit.scale - 1, factor=5.14444444)
+
+# ----- Temperature -----
+# TODO: The relationship between Celsius and Kelvin should be linear, but the current implementation is not.
+# zero_Celsius = Unit.create(kelvin.dim, name="zero Celsius", dispname="0°C", scale=kelvin.scale, factor=273.15)
+degree_Fahrenheit = Unit.create(kelvin.dim, name="degree Fahrenheit", dispname="°F", scale=kelvin.scale + 2,
+                                factor=2.55927778)
+
+# ----- Energy -----
+eV = electron_volt = Unit.create(joule.dim, name="electronvolt", dispname="eV", scale=-19, factor=1.602176565)
+calorie = calorie_th = Unit.create(joule.dim, name="calorie", dispname="cal", scale=joule.scale, factor=4.184)
+calorie_IT = Unit.create(joule.dim, name="calorie (International Table)", dispname="cal IT", scale=joule.scale,
+                         factor=4.1868)
+erg = Unit.create(joule.dim, name="erg", dispname="erg", scale=joule.scale - 7, factor=1.)
+Btu = Btu_IT = Unit.create(joule.dim, name="British thermal unit (International Table)", dispname="Btu IT",
+                           scale=joule.scale + 4, factor=1.05505585262)
+Btu_th = Unit.create(joule.dim, name="British thermal unit (thermochemical)", dispname="Btu th", scale=joule.scale + 4,
+                     factor=1.0543499999744)
+ton_TNT = Unit.create(joule.dim, name="ton of TNT", dispname="ton TNT", scale=joule.scale + 9, factor=4.184)
+
+# ----- Power -----
+hp = horsepower = Unit.create(watt.dim, name="horsepower", dispname="hp", scale=watt.scale + 3,
+                              factor=7.4569987158227022)
+
+# ----- Force -----
+dyn = dyne = Unit.create(newton.dim, name="dyne", dispname="dyn", scale=newton.scale - 5, factor=1.)
+lbf = pound_force = Unit.create(newton.dim, name="pound force", dispname="lbf", scale=newton.scale,
+                                factor=4.4482216152605)
+kgf = kilogram_force = Unit.create(newton.dim, name="kilogram force", dispname="kgf", scale=newton.scale,
+                                   factor=9.80665)
 
 # UNITS in modular dynamics
 # See https://github.com/chaobrain/brainunit/issues/63
-
-electron_volt = Unit.create(joule.dim, name="electronvolt", dispname="eV", scale=-19, factor=1.602176565)
-elementary_charge = eV = electron_volt
-# atomic mass unit (amu)
-AMU = Unit.create(kilogram.dim, name="atomic mass unit", dispname="AMU", scale=-27, factor=1.66053886)
 # Intermolecular force 分子间作用力
-IMF = Unit.create(eV.dim / angstrom.dim, name="intermolecular force", dispname="IMF", scale=-9, factor=1.602176565)
+IMF = Unit.create(newton.dim, name="intermolecular force", dispname="IMF", scale=newton.scale - 9, factor=1.602176565)
+
+""""
+References
+==========
 
+.. [CODATA2018] CODATA Recommended Values of the Fundamental
+   Physical Constants 2018.
 
+   https://physics.nist.gov/cuu/Constants/
 
+"""
\ No newline at end of file

From 1a6ab3ea6e66976a8278c3a8699d5fe39d4a37ac Mon Sep 17 00:00:00 2001
From: Sichao He <1310722434@qq.com>
Date: Sun, 22 Dec 2024 12:00:02 +0800
Subject: [PATCH 2/4] Add more constants (`Quantity`)

---
 brainunit/__init__.py        |   7 +--
 brainunit/_unit_constants.py |  10 ++--
 brainunit/constants.py       | 109 ++++++++++++++++++++++++++++++-----
 brainunit/constants_test.py  |  35 +++++++++++
 4 files changed, 137 insertions(+), 24 deletions(-)

diff --git a/brainunit/__init__.py b/brainunit/__init__.py
index 81e48e6..5cea734 100644
--- a/brainunit/__init__.py
+++ b/brainunit/__init__.py
@@ -32,15 +32,14 @@
 from ._unit_constants import *
 from ._unit_shortcuts import *
 from ._unit_shortcuts import __all__ as _std_units_all
-from .constants import *
-from .constants import __all__ as _constants_all
+# from .constants import *
+# from .constants import __all__ as _constants_all
 
 __all__ = (
     ['math', 'linalg', 'autograd', 'fft', 'constants', 'sparse'] +
     _common_all +
     _std_units_all +
-    _constants_all +
     _base_all +
     _celsius_all
 )
-del _common_all, _std_units_all, _constants_all, _base_all, _celsius_all, _matplotlib_compat
+del _common_all, _std_units_all, _base_all, _celsius_all, _matplotlib_compat
diff --git a/brainunit/_unit_constants.py b/brainunit/_unit_constants.py
index cbf4666..9d6982a 100644
--- a/brainunit/_unit_constants.py
+++ b/brainunit/_unit_constants.py
@@ -68,9 +68,9 @@
 nautical_mile = Unit.create(meter.dim, name="nautical mile", dispname="nmi", scale=meter.scale + 3, factor=1.8520)
 fermi = Unit.create(meter.dim, name="fermi", dispname="fm", scale=meter.scale - 15)
 angstrom = Unit.create(meter.dim, name="angstrom", dispname="Å", scale=meter.scale - 10, factor=1.0)
-micron = Unit.create(meter.dim, name="micron", dispname="µm", scale=meter.scale - 6, factor=1.0e-6)
+micron = Unit.create(meter.dim, name="micron", dispname="µm", scale=meter.scale - 6, factor=1.)
 au = astronomical_unit = Unit.create(meter.dim, name="astronomical unit", dispname="AU", scale=meter.scale + 11,
-                                     factor=1.495978707e11)
+                                     factor=1.495978707)
 light_year = Unit.create(meter.dim, name="light year", dispname="ly", scale=meter.scale + 15, factor=9.460730777119564)
 parsec = Unit.create(meter.dim, name="parsec", dispname="pc", scale=meter.scale + 16, factor=3.085677581491367e16)
 
@@ -116,13 +116,13 @@
                          factor=4.1868)
 erg = Unit.create(joule.dim, name="erg", dispname="erg", scale=joule.scale - 7, factor=1.)
 Btu = Btu_IT = Unit.create(joule.dim, name="British thermal unit (International Table)", dispname="Btu IT",
-                           scale=joule.scale + 4, factor=1.05505585262)
-Btu_th = Unit.create(joule.dim, name="British thermal unit (thermochemical)", dispname="Btu th", scale=joule.scale + 4,
+                           scale=joule.scale + 3, factor=1.05505585262)
+Btu_th = Unit.create(joule.dim, name="British thermal unit (thermochemical)", dispname="Btu th", scale=joule.scale + 3,
                      factor=1.0543499999744)
 ton_TNT = Unit.create(joule.dim, name="ton of TNT", dispname="ton TNT", scale=joule.scale + 9, factor=4.184)
 
 # ----- Power -----
-hp = horsepower = Unit.create(watt.dim, name="horsepower", dispname="hp", scale=watt.scale + 3,
+hp = horsepower = Unit.create(watt.dim, name="horsepower", dispname="hp", scale=watt.scale + 2,
                               factor=7.4569987158227022)
 
 # ----- Force -----
diff --git a/brainunit/constants.py b/brainunit/constants.py
index 151e801..f17e4eb 100644
--- a/brainunit/constants.py
+++ b/brainunit/constants.py
@@ -19,7 +19,7 @@
 have to be imported explicitly. You can use ``import ... as ...`` to import them
 with shorter names, e.g.::
 
-    from brainunit import faraday_constant as F
+    from brainunit.constants import faraday_constant as F
 
 The available constants are:
 
@@ -51,21 +51,9 @@
     kilogram,
     meter,
     mole,
-    newton,
+    newton, radian, second, pascal, meter2, meter3, watt,
 )
-
-__all__ = [
-    'avogadro_constant',
-    'boltzmann_constant',
-    'electric_constant',
-    'electron_mass',
-    'elementary_charge',
-    'faraday_constant',
-    'gas_constant',
-    'magnetic_constant',
-    'molar_mass_constant',
-    'zero_celsius',
-]
+from ._unit_constants import speed_unit
 
 #: Avogadro constant (http://physics.nist.gov/cgi-bin/cuu/Value?na)
 avogadro_constant = np.asarray(6.022140857e23) / mole
@@ -87,3 +75,94 @@
 molar_mass_constant = np.asarray(1.) * (gram / mole)
 #: zero degree Celsius
 zero_celsius = np.asarray(273.15) * kelvin
+
+# ----- Mass -----
+metric_ton = np.asarray(1e3) * kilogram  # Metric ton
+grain = np.asarray(6.479891e-5) * kilogram  # Grain
+lb = pound = np.asarray(0.45359237) * kilogram  # Pound
+slinch = blob = np.asarray(1.75126836e2) * kilogram  # Blob (slug-inch)
+slug = np.asarray(1.459390294e1) * kilogram  # Slug
+oz = ounce = np.asarray(2.8349523125e-2) * kilogram  # Ounce
+stone = np.asarray(6.35029318) * kilogram  # Stone
+long_ton = np.asarray(1.0160469088e3) * kilogram  # Long ton
+short_ton = np.asarray(0.90718474e3) * kilogram  # Short ton
+troy_ounce = np.asarray(3.11034768e-2) * kilogram  # Troy ounce
+troy_pound = np.asarray(0.3732417216) * kilogram  # Troy pound
+carat = np.asarray(2e-4) * kilogram  # Carat
+atomic_mass = np.asarray(1.66053886e-27) * kilogram  # Atomic mass unit (amu)
+
+# ----- Angle -----
+degree = np.asarray(np.pi / 180) * radian  # Degree
+arcmin = arcminute = np.asarray(np.pi / (180 * 60)) * radian  # Arcminute
+arcsec = arcsecond = np.asarray(np.pi / (180 * 3600)) * radian  # Arcsecond
+
+# ----- Time -----
+minute = np.asarray(60) * second  # Minute
+hour = np.asarray(3600) * second  # Hour
+day = np.asarray(86400) * second  # Day
+week = np.asarray(604800) * second  # Week
+month = np.asarray(2.629746e6) * second  # Month (approx.)
+year = np.asarray(3.1556952e7) * second  # Year (approx.)
+julian_year = np.asarray(3.15576e7) * second  # Julian year
+
+# ----- Length -----
+inch = np.asarray(0.0254) * meter  # Inch
+foot = np.asarray(0.3048) * meter  # Foot
+yard = np.asarray(0.9144) * meter  # Yard
+mile = np.asarray(1609.344) * meter  # Mile
+mil = np.asarray(2.54e-5) * meter  # Mil
+point = np.asarray(3.5277777777777776e-4) * meter  # Point
+pica = np.asarray(4.233333333333333e-3) * meter  # Pica
+survey_foot = np.asarray(0.3048006096012192) * meter  # Survey foot
+survey_mile = np.asarray(1609.3472186944374) * meter  # Survey mile
+nautical_mile = np.asarray(1852) * meter  # Nautical mile
+fermi = np.asarray(1e-15) * meter  # Fermi
+angstrom = np.asarray(1e-10) * meter  # Ångstrom
+micron = np.asarray(1e-6) * meter  # Micron
+au = astronomical_unit = np.asarray(1.495978707e11) * meter  # Astronomical unit
+light_year = np.asarray(9.460730777119564e15) * meter  # Light year
+parsec = np.asarray(3.085677581491367e16) * meter  # Parsec
+
+# ----- Pressure -----
+atm = atmosphere = np.asarray(1.013249966e5) * (newton / meter2)  # Atmosphere
+bar = np.asarray(1e5) * (newton / meter2)  # Bar
+mmHg = torr = np.asarray(1.3332236842105263e2) * (newton / meter2)  # Torr (mmHg)
+psi = np.asarray(6.894757293168361e3) * (newton / meter2)  # Pound per square inch (psi)
+
+# ----- Area -----
+hectare = np.asarray(1e4) * meter2  # Hectare
+acre = np.asarray(4046.864798) * meter2  # Acre
+
+# ----- Volume -----
+gallon = gallon_US = np.asarray(3.785411784e-3) * meter3  # Gallon (US)
+gallon_imp = np.asarray(4.54609e-3) * meter3  # Imperial gallon
+fluid_ounce = fluid_ounce_US = np.asarray(2.95735295625e-5) * meter3  # Fluid ounce (US)
+fluid_ounce_imp = np.asarray(2.84130742e-5) * meter3  # Imperial fluid ounce
+bbl = barrel = np.asarray(1.58987294928e2) * meter3  # Barrel (oil)
+
+# ----- Temperature -----
+degree_Fahrenheit = np.asarray(2.55927778e2) * kelvin  # Fahrenheit
+
+# ----- Speed -----
+kmh = np.asarray(2.77777778e-1) * speed_unit  # Kilometer per hour
+mph = np.asarray(4.4704e-1) * speed_unit  # Mile per hour
+knot = np.asarray(5.14444444e-1) * speed_unit  # Knot
+mach = np.asarray(3.4029e2) * speed_unit  # Mach
+
+# ----- Energy -----
+eV = electronvolt = np.asarray(1.6021766208e-19) * joule  # Electronvolt
+calorie = calorie_th = np.asarray(4.184) * joule  # Calorie (thermochemical)
+calorie_IT = np.asarray(4.1868) * joule  # Calorie (International Table)
+erg = np.asarray(1e-7) * joule  # Erg
+Btu = Btu_IT = np.asarray(1.05505585262e3) * joule  # British thermal unit (International Table)
+Btu_th = np.asarray(1.05435026444e3) * joule  # British thermal unit (thermochemical)
+ton_TNT = np.asarray(4.184e9) * joule  # Ton of TNT
+
+# ----- Power -----
+hp = horsepower = np.asarray(7.4569987158227022e2) * watt  # Horsepower
+
+# ----- Force -----
+dyn = dyne = np.asarray(1e-5) * newton  # Dyne
+lbf = pound_force = np.asarray(4.4482216152605) * newton  # Pound-force
+kgf = kilogram_force = np.asarray(9.80665) * newton  # Kilogram-force
+IMF = np.asarray(1.602176565e-9) * newton  # Intermolecular force
diff --git a/brainunit/constants_test.py b/brainunit/constants_test.py
index 06add7e..bb687ef 100644
--- a/brainunit/constants_test.py
+++ b/brainunit/constants_test.py
@@ -18,6 +18,34 @@
 import brainunit as u
 from brainunit._unit_common import *
 
+constants_list = [
+    # Mass
+    'metric_ton', 'grain', 'pound', 'slinch', 'slug', 'ounce', 'stone', 'long_ton', 'short_ton', 'troy_ounce',
+    'troy_pound', 'carat', 'atomic_mass',
+    # Angle
+    'degree', 'arcmin', 'arcsec',
+    # Time
+    'minute', 'hour', 'day', 'week', 'month', 'year', 'julian_year',
+    # Length
+    'inch', 'foot', 'yard', 'mile', 'mil', 'point', 'pica', 'survey_foot', 'survey_mile', 'nautical_mile', 'fermi',
+    'angstrom', 'micron', 'au', 'light_year',
+    # Pressure
+    'atm', 'bar', 'mmHg', 'psi',
+    # Area
+    'hectare', 'acre',
+    # Volume
+    'gallon', 'gallon_imp', 'fluid_ounce', 'fluid_ounce_imp', 'bbl',
+    # Speed
+    'kmh', 'mph', 'knot', 'mach',
+    # Temperature
+    'degree_Fahrenheit',
+    # Energy
+    'eV', 'calorie', 'calorie_IT', 'erg', 'Btu', 'Btu_IT', 'ton_TNT',
+    # Power
+    'hp',
+    # Force
+    'dyn', 'lbf', 'kgf', 'IMF',
+]
 
 class TestConstant(unittest.TestCase):
 
@@ -45,3 +73,10 @@ def test_constants(self):
             constants.faraday_constant.mantissa,
             (constants.avogadro_constant * constants.elementary_charge).mantissa,
         )
+    def test_quantity_constants_and_unit_constants(self):
+        import brainunit.constants as quantity_constants
+        import brainunit._unit_constants as unit_constants
+        for c in constants_list:
+            q_c = getattr(quantity_constants, c)
+            u_c = getattr(unit_constants, c)
+            assert q_c.to_decimal(q_c.unit) == (1. * u_c).to_decimal(q_c.unit), f"Mismatch between {c} in quantity_constants and unit_constants"

From 3ff33c716018f085e3539efa1c921dbe4bcbdb94 Mon Sep 17 00:00:00 2001
From: Sichao He <1310722434@qq.com>
Date: Sun, 22 Dec 2024 12:03:04 +0800
Subject: [PATCH 3/4] Fix bug

---
 brainunit/math/_fun_keep_unit.py | 20 +-------------------
 1 file changed, 1 insertion(+), 19 deletions(-)

diff --git a/brainunit/math/_fun_keep_unit.py b/brainunit/math/_fun_keep_unit.py
index 4af911d..285a694 100644
--- a/brainunit/math/_fun_keep_unit.py
+++ b/brainunit/math/_fun_keep_unit.py
@@ -59,7 +59,7 @@
     'percentile', 'nanpercentile', 'quantile', 'nanquantile',
 
     # math funcs only accept unitless (unary) can return Quantity
-    'round', 'around', 'round_', 'rint', 'floor', 'ceil', 'trunc', 'fix', 'modf',
+    'round', 'around', 'rint', 'floor', 'ceil', 'trunc', 'fix', 'modf',
 
     # math funcs keep unit (binary)
     'fmod', 'mod', 'copysign', 'remainder',
@@ -3377,24 +3377,6 @@ def unique(
                           fill_value=fill_value)
 
 
-@set_module_as('brainunit.math')
-def round_(
-    x: Union[Quantity, jax.typing.ArrayLike],
-) -> jax.Array | Quantity:
-    """
-    Round an array to the nearest integer.
-
-    Parameters
-    ----------
-    x : array_like, Quantity
-      Input array.
-
-    Returns
-    -------
-    out : jax.Array
-    """
-    return _fun_keep_unit_unary(jnp.round, x)
-
 
 @set_module_as('brainunit.math')
 def round(

From d2b57c005971af97857a9ab472c3b2dff9a832e4 Mon Sep 17 00:00:00 2001
From: Sichao He <1310722434@qq.com>
Date: Sun, 22 Dec 2024 12:06:10 +0800
Subject: [PATCH 4/4] Update _fun_keep_unit_test.py

---
 brainunit/math/_fun_keep_unit_test.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/brainunit/math/_fun_keep_unit_test.py b/brainunit/math/_fun_keep_unit_test.py
index 23b0796..b489b3c 100644
--- a/brainunit/math/_fun_keep_unit_test.py
+++ b/brainunit/math/_fun_keep_unit_test.py
@@ -52,7 +52,7 @@
 ]
 
 fun_accept_unitless_unary_can_return_quantity = [
-    'round', 'around', 'round_', 'rint',
+    'round', 'around', 'rint',
     'floor', 'ceil', 'trunc', 'fix',
 ]
 fun_keep_unit_math_binary = [