diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index bc7b1018..d0936fa6 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -39,6 +39,7 @@ jobs:
           poetry install -v
           pip install wcwidth
           pip install scipy
+          pip install python-slugify
           # reinstall pandas to specific version
           pip install $PANDAS
         env:
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 3ed31e26..2d024be0 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -17,16 +17,15 @@ repos:
         pass_filenames: false
         always_run: true
         language: system
--   repo: https://github.com/pre-commit/mirrors-pylint
-    rev: v2.4.4
+-   repo: local
     hooks:
     -   id: pylint
+        name: Run pylint
         files: ^datar/.+$
         pass_filenames: false
+        entry: pylint datar
         types: [python]
-        args: [datar]
--   repo: local
-    hooks:
+        language: system
     -   id: poetry2setuppy
         name: Convert pyproject.toml to setup.py
         entry: dephell deps convert --from=poetry --to=setup.py
diff --git a/datar/__init__.py b/datar/__init__.py
index 4934b6df..d99904a5 100644
--- a/datar/__init__.py
+++ b/datar/__init__.py
@@ -7,7 +7,7 @@
 from .core.defaults import f
 
 __all__ = ('f', 'get_versions')
-__version__ = "0.4.3"
+__version__ = "0.4.4"
 
 def get_versions(
     prnt: bool = True
diff --git a/datar/base/__init__.py b/datar/base/__init__.py
index 82ca5fdb..efcc0f3c 100644
--- a/datar/base/__init__.py
+++ b/datar/base/__init__.py
@@ -33,7 +33,7 @@
     log,
     log2,
     log10,
-    log1p
+    log1p,
 )
 from .bessel import bessel_i, bessel_j, bessel_k, bessel_y
 from .casting import as_double, as_float, as_int, as_integer, as_numeric
@@ -50,7 +50,14 @@
     is_factor,
     levels,
 )
-from .funs import cut, data_context, expandgrid, identity
+from .funs import (
+    cut,
+    data_context,
+    expandgrid,
+    identity,
+    make_unique,
+    make_names,
+)
 from .logical import (
     FALSE,
     TRUE,
@@ -75,7 +82,7 @@
     seq_along,
     seq_len,
     unique,
-    match
+    match,
 )
 from .special import (
     beta,
diff --git a/datar/base/funs.py b/datar/base/funs.py
index 15c378be..ae22f300 100644
--- a/datar/base/funs.py
+++ b/datar/base/funs.py
@@ -4,7 +4,7 @@
 registered by `register_verb` and should be placed in `./verbs.py`
 """
 import itertools
-from typing import Any, Callable, Iterable, Union
+from typing import Any, Callable, Iterable, List, Union
 import numpy
 
 import pandas
@@ -12,8 +12,9 @@
 from pipda import register_func
 
 from ..core.middlewares import WithDataEnv
-from ..core.types import NumericType
+from ..core.types import NumericType, is_scalar
 from ..core.contexts import Context
+from ..core.names import repair_names
 
 
 @register_func(None, context=Context.EVAL)
@@ -131,3 +132,48 @@ def data_context(data: DataFrame) -> Any:
         The original or modified data
     """
     return WithDataEnv(data)
+
+def make_names(names: Any, unique: bool = False) -> List[str]:
+    """Make names available as columns and can be accessed by `df.<name>`
+
+    The names will be transformed using `python-slugify` with
+    `lowercase=False` and `separator="_"`. When the first character is
+    a digit, preface it with "_".
+
+    If `unique` is True, the results will be fed into
+    `datar.core.names.repair_names(names, "unique")`
+
+    Args:
+        names: The names
+            if it is scalar, will make it into a list.
+            Then all elements will be converted into strings
+        unique: Whether to make the names unique
+
+    Returns:
+        Converted names
+    """
+    from slugify import slugify
+    from . import as_character
+    if is_scalar(names):
+        names = [names]
+    names = as_character(names)
+    names = [slugify(name, separator="_", lowercase=False) for name in names]
+    names = [f"_{name}" if name[0].isdigit() else name for name in names]
+    if unique:
+        return repair_names(names, "unique")
+    return names
+
+def make_unique(names: Any) -> List[str]:
+    """Make the names unique.
+
+    It's a shortcut for `make_names(names, unique=True)`
+
+    Args:
+        names: The names
+            if it is scalar, will make it into a list.
+            Then all elements will be converted into strings
+
+    Returns:
+        Converted names
+    """
+    return make_names(names, unique=True)
diff --git a/datar/tibble/tibble.py b/datar/tibble/tibble.py
index 0b462c7a..cbe00589 100644
--- a/datar/tibble/tibble.py
+++ b/datar/tibble/tibble.py
@@ -3,7 +3,7 @@
 from typing import Any, Union, Callable, Mapping, Iterable, Tuple
 
 from pandas import DataFrame
-from varname import argname2, varname, VarnameRetrievingError
+from varname import argname, varname, VarnameException
 
 import pipda
 from pipda import register_func, evaluate_expr
@@ -59,13 +59,16 @@ def tibble(
     args = tuple((arg for arg in args if arg is not None))
     if not args and not kwargs:
         df = DataFrame() if not _rows else DataFrame(index=range(_rows))
-        df.__dfname__ = varname(raise_exc=False, ignore=pipda)
+        try:
+            df.__dfname__ = varname(ignore=pipda)
+        except VarnameException:
+            pass
         return df
 
     names = [None] * len(args)
     values = list(args)
     try:
-        argnames = argname2(
+        argnames = argname(
             "*args",
             frame=frame_,
             ignore=pipda,
@@ -73,8 +76,8 @@ def tibble(
             vars_only=False,
         )
         if len(argnames) != len(args):
-            raise VarnameRetrievingError
-    except VarnameRetrievingError:
+            raise VarnameException
+    except VarnameException:
         argnames = None
 
     if argnames:
@@ -93,7 +96,10 @@ def tibble(
         names, values, _name_repair=_name_repair, base0_=base0_, dtypes_=dtypes_
     )
 
-    out.__dfname__ = varname(raise_exc=False, frame=frame_, ignore=pipda)
+    try:
+        out.__dfname__ = varname(frame=frame_, ignore=pipda)
+    except VarnameException:
+        pass
 
     if not kwargs and len(args) == 1 and isinstance(args[0], DataFrame):
         copy_attrs(out, args[0])
@@ -139,8 +145,8 @@ def tibble_row(
     if df.shape[0] > 1:
         raise ValueError("All arguments must be size one, use `[]` to wrap.")
     try:
-        df.__dfname__ = varname(raise_exc=False)
-    except VarnameRetrievingError:  # pragma: no cover
+        df.__dfname__ = varname()
+    except VarnameException:  # pragma: no cover
         df.__dfname__ = None
 
     apply_dtypes(df, dtypes_)
diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 4bbfd33d..648a01da 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -1,3 +1,8 @@
+## 0.4.4
+
+- Adopt `varname` `v0.8.0`
+- Add `base.make_names()` and `base.make_unique()`
+
 ## 0.4.3
 
 - Adopt `pipda` `0.4.5`
diff --git a/docs/reference-maps/base.md b/docs/reference-maps/base.md
index 51a6e665..d97b0557 100644
--- a/docs/reference-maps/base.md
+++ b/docs/reference-maps/base.md
@@ -268,6 +268,8 @@
 |[`expandgrid`][115]|Create a Data Frame from All Combinations of Factor Variables|[:material-notebook:][4]|
 |[`max_col`][136]|Find the maximum position for each row of a matrix||
 |[`complete_cases`][137]|Get a bool array indicating whether the values of rows are complete in a data frame.||
+|[`make_names`][137]|Make names available as columns and can be accessed by `df.<name>`||
+|[`make_unique`][138]|Make the names unique, alias of `make_names(names, unique=True)`||
 |[**`data_context`**][116]|Mimic R's `with`|[:material-notebook:][4]|
 
 
@@ -278,133 +280,135 @@
 [5]: ../../api/datar.core.options/#datar.core.options.options
 [6]: ../../api/datar.core.options/#datar.core.options.get_option
 [7]: ../../api/datar.core.options/#datar.core.options.options_context
-[8]: ../../api/datar.core.arithmetic/#datar.core.arithmetic.mean
-[9]: ../../api/datar.core.arithmetic/#datar.core.arithmetic.median
-[10]: ../../api/datar.core.arithmetic/#datar.core.arithmetic.min
-[11]: ../../api/datar.core.arithmetic/#datar.core.arithmetic.max
-[12]: ../../api/datar.core.arithmetic/#datar.core.arithmetic.pmin
-[13]: ../../api/datar.core.arithmetic/#datar.core.arithmetic.pmax
-[14]: ../../api/datar.core.arithmetic/#datar.core.arithmetic.sum
-[15]: ../../api/datar.core.arithmetic/#datar.core.arithmetic.abs
-[16]: ../../api/datar.core.arithmetic/#datar.core.arithmetic.round
-[17]: ../../api/datar.core.arithmetic/#datar.core.arithmetic.var
-[18]: ../../api/datar.core.arithmetic/#datar.core.arithmetic.ceiling
-[19]: ../../api/datar.core.arithmetic/#datar.core.arithmetic.floor
-[20]: ../../api/datar.core.arithmetic/#datar.core.arithmetic.sqrt
-[21]: ../../api/datar.core.arithmetic/#datar.core.arithmetic.cov
-[22]: ../../api/datar.core.bessel/#datar.core.bessel.bessel_i
-[23]: ../../api/datar.core.bessel/#datar.core.bessel.bessel_j
-[24]: ../../api/datar.core.bessel/#datar.core.bessel.bessel_k
-[25]: ../../api/datar.core.bessel/#datar.core.bessel.bessel_y
-[26]: ../../api/datar.core.casting/#datar.core.casting.as_integer
-[27]: ../../api/datar.core.casting/#datar.core.casting.as_double
-[28]: ../../api/datar.core.casting/#datar.core.casting.as_float
-[29]: ../../api/datar.core.casting/#datar.core.casting.as_numeric
-[30]: ../../api/datar.core.complex/#datar.core.complex.re
-[31]: ../../api/datar.core.complex/#datar.core.complex.mod
-[32]: ../../api/datar.core.complex/#datar.core.complex.im
-[33]: ../../api/datar.core.complex/#datar.core.complex.arg
-[34]: ../../api/datar.core.complex/#datar.core.complex.conj
-[35]: ../../api/datar.core.complex/#datar.core.complex.is_complex
-[36]: ../../api/datar.core.complex/#datar.core.complex.as_complex
-[37]: ../../api/datar.core.cum/#datar.core.cum.cumsum
-[38]: ../../api/datar.core.cum/#datar.core.cum.cumprod
-[39]: ../../api/datar.core.cum/#datar.core.cum.cummin
-[40]: ../../api/datar.core.cum/#datar.core.cum.cummax
-[41]: ../../api/datar.core.date/#datar.core.date.as_date
-[42]: ../../api/datar.core.factor/#datar.core.factor.factor
-[43]: ../../api/datar.core.factor/#datar.core.factor.droplevels
-[44]: ../../api/datar.core.factor/#datar.core.factor.levels
-[45]: ../../api/datar.core.factor/#datar.core.factor.is_factor
-[46]: ../../api/datar.core.factor/#datar.core.factor.as_factor
-[47]: ../../api/datar.core.logical/#datar.core.logical.is_true
-[48]: ../../api/datar.core.logical/#datar.core.logical.is_false
-[49]: ../../api/datar.core.logical/#datar.core.logical.is_logical
-[50]: ../../api/datar.core.logical/#datar.core.logical.as_logical
-[51]: ../../api/datar.core.na/#datar.core.na.is_na
-[52]: ../../api/datar.core.na/#datar.core.na.any_na
-[53]: ../../api/datar.core.null/#datar.core.null.is_null
-[54]: ../../api/datar.core.null/#datar.core.null.as_null
-[55]: ../../api/datar.core.random/#datar.core.random.set_seed
-[56]: ../../api/datar.core.seq/#datar.core.seq.c
-[57]: ../../api/datar.core.seq/#datar.core.seq.seq
-[58]: ../../api/datar.core.seq/#datar.core.seq.seq_len
-[59]: ../../api/datar.core.seq/#datar.core.seq.seq_along
-[60]: ../../api/datar.core.seq/#datar.core.seq.rev
-[61]: ../../api/datar.core.seq/#datar.core.seq.rep
-[62]: ../../api/datar.core.seq/#datar.core.seq.lengths
-[63]: ../../api/datar.core.seq/#datar.core.seq.unique
-[64]: ../../api/datar.core.seq/#datar.core.seq.sample
-[65]: ../../api/datar.core.seq/#datar.core.seq.length
-[66]: ../../api/datar.core.special/#datar.core.special.beta
-[67]: ../../api/datar.core.special/#datar.core.special.lbeta
-[68]: ../../api/datar.core.special/#datar.core.special.gamma
-[69]: ../../api/datar.core.special/#datar.core.special.lgamma
-[70]: ../../api/datar.core.special/#datar.core.special.digamma
-[71]: ../../api/datar.core.special/#datar.core.special.trigamma
-[72]: ../../api/datar.core.special/#datar.core.special.psigamma
-[73]: ../../api/datar.core.special/#datar.core.special.choose
-[74]: ../../api/datar.core.special/#datar.core.special.lchoose
-[75]: ../../api/datar.core.special/#datar.core.special.factorial
-[76]: ../../api/datar.core.special/#datar.core.special.lfactorial
-[77]: ../../api/datar.core.string/#datar.core.string.is_character
-[78]: ../../api/datar.core.string/#datar.core.string.as_character
-[79]: ../../api/datar.core.string/#datar.core.string.grep
-[80]: ../../api/datar.core.string/#datar.core.string.grepl
-[81]: ../../api/datar.core.string/#datar.core.string.sub
-[82]: ../../api/datar.core.string/#datar.core.string.gsub
-[83]: ../../api/datar.core.string/#datar.core.string.nchar
-[84]: ../../api/datar.core.string/#datar.core.string.nzchar
-[85]: ../../api/datar.core.string/#datar.core.string.paste
-[86]: ../../api/datar.core.string/#datar.core.string.paste0
-[87]: ../../api/datar.core.string/#datar.core.string.sprintf
-[88]: ../../api/datar.core.string/#datar.core.string.substr
-[89]: ../../api/datar.core.string/#datar.core.string.substring
-[90]: ../../api/datar.core.string/#datar.core.string.strsplit
-[91]: ../../api/datar.core.table/#datar.core.table.table
-[92]: ../../api/datar.core.testing/#datar.core.testing.is_double
-[93]: ../../api/datar.core.testing/#datar.core.testing.is_float
-[94]: ../../api/datar.core.testing/#datar.core.testing.is_integer
-[95]: ../../api/datar.core.testing/#datar.core.testing.is_atomic
-[96]: ../../api/datar.core.testing/#datar.core.testing.is_element
-[97]: ../../api/datar.core.trig_hb/#datar.core.trig_hb.cos
-[98]: ../../api/datar.core.trig_hb/#datar.core.trig_hb.sin
-[99]: ../../api/datar.core.trig_hb/#datar.core.trig_hb.tan
-[100]: ../../api/datar.core.trig_hb/#datar.core.trig_hb.acos
-[101]: ../../api/datar.core.trig_hb/#datar.core.trig_hb.asin
-[102]: ../../api/datar.core.trig_hb/#datar.core.trig_hb.atan
-[103]: ../../api/datar.core.trig_hb/#datar.core.trig_hb.atan2
-[104]: ../../api/datar.core.trig_hb/#datar.core.trig_hb.cospi
-[105]: ../../api/datar.core.trig_hb/#datar.core.trig_hb.sinpi
-[106]: ../../api/datar.core.trig_hb/#datar.core.trig_hb.tanpi
-[107]: ../../api/datar.core.trig_hb/#datar.core.trig_hb.cosh
-[108]: ../../api/datar.core.trig_hb/#datar.core.trig_hb.sinh
-[109]: ../../api/datar.core.trig_hb/#datar.core.trig_hb.tanh
-[110]: ../../api/datar.core.trig_hb/#datar.core.trig_hb.acosh
-[111]: ../../api/datar.core.trig_hb/#datar.core.trig_hb.asinh
-[112]: ../../api/datar.core.trig_hb/#datar.core.trig_hb.atanh
-[113]: ../../api/datar.core.funs/#datar.core.funs.cut
-[114]: ../../api/datar.core.funs/#datar.core.funs.identity
-[115]: ../../api/datar.core.funs/#datar.core.funs.expandgrid
-[116]: ../../api/datar.core.funs/#datar.core.funs.data_context
-[117]: ../../api/datar.core.arithmetic/#datar.core.arithmetic.prod
-[118]: ../../api/datar.core.arithmetic/#datar.core.arithmetic.sign
-[119]: ../../api/datar.core.arithmetic/#datar.core.arithmetic.trunc
-[120]: ../../api/datar.core.arithmetic/#datar.core.arithmetic.exp
-[121]: ../../api/datar.core.arithmetic/#datar.core.arithmetic.log
-[122]: ../../api/datar.core.arithmetic/#datar.core.arithmetic.log2
-[123]: ../../api/datar.core.arithmetic/#datar.core.arithmetic.log10
-[124]: ../../api/datar.core.arithmetic/#datar.core.arithmetic.log1p
-[125]: ../../api/datar.core.arithmetic/#datar.core.arithmetic.signif
-[126]: ../../api/datar.core.na/#datar.core.na.is_finite
-[127]: ../../api/datar.core.na/#datar.core.na.is_infinite
-[128]: ../../api/datar.core.na/#datar.core.na.is_nan
-[129]: ../../api/datar.core.seq/#datar.core.seq.match
-[130]: ../../api/datar.core.string/#datar.core.string.startswith
-[131]: ../../api/datar.core.string/#datar.core.string.endswith
-[132]: ../../api/datar.core.string/#datar.core.string.strtoi
-[133]: ../../api/datar.core.string/#datar.core.string.chartr
-[134]: ../../api/datar.core.string/#datar.core.string.tolower
-[135]: ../../api/datar.core.string/#datar.core.string.toupper
-[136]: ../../api/datar.core.verbs/#datar.core.verbs.max_col
-[137]: ../../api/datar.core.verbs/#datar.core.verbs.complete_cases
+[8]: ../../api/datar.base.arithmetic/#datar.base.arithmetic.mean
+[9]: ../../api/datar.base.arithmetic/#datar.base.arithmetic.median
+[10]: ../../api/datar.base.arithmetic/#datar.base.arithmetic.min
+[11]: ../../api/datar.base.arithmetic/#datar.base.arithmetic.max
+[12]: ../../api/datar.base.arithmetic/#datar.base.arithmetic.pmin
+[13]: ../../api/datar.base.arithmetic/#datar.base.arithmetic.pmax
+[14]: ../../api/datar.base.arithmetic/#datar.base.arithmetic.sum
+[15]: ../../api/datar.base.arithmetic/#datar.base.arithmetic.abs
+[16]: ../../api/datar.base.arithmetic/#datar.base.arithmetic.round
+[17]: ../../api/datar.base.arithmetic/#datar.base.arithmetic.var
+[18]: ../../api/datar.base.arithmetic/#datar.base.arithmetic.ceiling
+[19]: ../../api/datar.base.arithmetic/#datar.base.arithmetic.floor
+[20]: ../../api/datar.base.arithmetic/#datar.base.arithmetic.sqrt
+[21]: ../../api/datar.base.arithmetic/#datar.base.arithmetic.cov
+[22]: ../../api/datar.base.bessel/#datar.base.bessel.bessel_i
+[23]: ../../api/datar.base.bessel/#datar.base.bessel.bessel_j
+[24]: ../../api/datar.base.bessel/#datar.base.bessel.bessel_k
+[25]: ../../api/datar.base.bessel/#datar.base.bessel.bessel_y
+[26]: ../../api/datar.base.casting/#datar.base.casting.as_integer
+[27]: ../../api/datar.base.casting/#datar.base.casting.as_double
+[28]: ../../api/datar.base.casting/#datar.base.casting.as_float
+[29]: ../../api/datar.base.casting/#datar.base.casting.as_numeric
+[30]: ../../api/datar.base.complex/#datar.base.complex.re
+[31]: ../../api/datar.base.complex/#datar.base.complex.mod
+[32]: ../../api/datar.base.complex/#datar.base.complex.im
+[33]: ../../api/datar.base.complex/#datar.base.complex.arg
+[34]: ../../api/datar.base.complex/#datar.base.complex.conj
+[35]: ../../api/datar.base.complex/#datar.base.complex.is_complex
+[36]: ../../api/datar.base.complex/#datar.base.complex.as_complex
+[37]: ../../api/datar.base.cum/#datar.base.cum.cumsum
+[38]: ../../api/datar.base.cum/#datar.base.cum.cumprod
+[39]: ../../api/datar.base.cum/#datar.base.cum.cummin
+[40]: ../../api/datar.base.cum/#datar.base.cum.cummax
+[41]: ../../api/datar.base.date/#datar.base.date.as_date
+[42]: ../../api/datar.base.factor/#datar.base.factor.factor
+[43]: ../../api/datar.base.factor/#datar.base.factor.droplevels
+[44]: ../../api/datar.base.factor/#datar.base.factor.levels
+[45]: ../../api/datar.base.factor/#datar.base.factor.is_factor
+[46]: ../../api/datar.base.factor/#datar.base.factor.as_factor
+[47]: ../../api/datar.base.logical/#datar.base.logical.is_true
+[48]: ../../api/datar.base.logical/#datar.base.logical.is_false
+[49]: ../../api/datar.base.logical/#datar.base.logical.is_logical
+[50]: ../../api/datar.base.logical/#datar.base.logical.as_logical
+[51]: ../../api/datar.base.na/#datar.base.na.is_na
+[52]: ../../api/datar.base.na/#datar.base.na.any_na
+[53]: ../../api/datar.base.null/#datar.base.null.is_null
+[54]: ../../api/datar.base.null/#datar.base.null.as_null
+[55]: ../../api/datar.base.random/#datar.base.random.set_seed
+[56]: ../../api/datar.base.seq/#datar.base.seq.c
+[57]: ../../api/datar.base.seq/#datar.base.seq.seq
+[58]: ../../api/datar.base.seq/#datar.base.seq.seq_len
+[59]: ../../api/datar.base.seq/#datar.base.seq.seq_along
+[60]: ../../api/datar.base.seq/#datar.base.seq.rev
+[61]: ../../api/datar.base.seq/#datar.base.seq.rep
+[62]: ../../api/datar.base.seq/#datar.base.seq.lengths
+[63]: ../../api/datar.base.seq/#datar.base.seq.unique
+[64]: ../../api/datar.base.seq/#datar.base.seq.sample
+[65]: ../../api/datar.base.seq/#datar.base.seq.length
+[66]: ../../api/datar.base.special/#datar.base.special.beta
+[67]: ../../api/datar.base.special/#datar.base.special.lbeta
+[68]: ../../api/datar.base.special/#datar.base.special.gamma
+[69]: ../../api/datar.base.special/#datar.base.special.lgamma
+[70]: ../../api/datar.base.special/#datar.base.special.digamma
+[71]: ../../api/datar.base.special/#datar.base.special.trigamma
+[72]: ../../api/datar.base.special/#datar.base.special.psigamma
+[73]: ../../api/datar.base.special/#datar.base.special.choose
+[74]: ../../api/datar.base.special/#datar.base.special.lchoose
+[75]: ../../api/datar.base.special/#datar.base.special.factorial
+[76]: ../../api/datar.base.special/#datar.base.special.lfactorial
+[77]: ../../api/datar.base.string/#datar.base.string.is_character
+[78]: ../../api/datar.base.string/#datar.base.string.as_character
+[79]: ../../api/datar.base.string/#datar.base.string.grep
+[80]: ../../api/datar.base.string/#datar.base.string.grepl
+[81]: ../../api/datar.base.string/#datar.base.string.sub
+[82]: ../../api/datar.base.string/#datar.base.string.gsub
+[83]: ../../api/datar.base.string/#datar.base.string.nchar
+[84]: ../../api/datar.base.string/#datar.base.string.nzchar
+[85]: ../../api/datar.base.string/#datar.base.string.paste
+[86]: ../../api/datar.base.string/#datar.base.string.paste0
+[87]: ../../api/datar.base.string/#datar.base.string.sprintf
+[88]: ../../api/datar.base.string/#datar.base.string.substr
+[89]: ../../api/datar.base.string/#datar.base.string.substring
+[90]: ../../api/datar.base.string/#datar.base.string.strsplit
+[91]: ../../api/datar.base.table/#datar.base.table.table
+[92]: ../../api/datar.base.testing/#datar.base.testing.is_double
+[93]: ../../api/datar.base.testing/#datar.base.testing.is_float
+[94]: ../../api/datar.base.testing/#datar.base.testing.is_integer
+[95]: ../../api/datar.base.testing/#datar.base.testing.is_atomic
+[96]: ../../api/datar.base.testing/#datar.base.testing.is_element
+[97]: ../../api/datar.base.trig_hb/#datar.base.trig_hb.cos
+[98]: ../../api/datar.base.trig_hb/#datar.base.trig_hb.sin
+[99]: ../../api/datar.base.trig_hb/#datar.base.trig_hb.tan
+[100]: ../../api/datar.base.trig_hb/#datar.base.trig_hb.acos
+[101]: ../../api/datar.base.trig_hb/#datar.base.trig_hb.asin
+[102]: ../../api/datar.base.trig_hb/#datar.base.trig_hb.atan
+[103]: ../../api/datar.base.trig_hb/#datar.base.trig_hb.atan2
+[104]: ../../api/datar.base.trig_hb/#datar.base.trig_hb.cospi
+[105]: ../../api/datar.base.trig_hb/#datar.base.trig_hb.sinpi
+[106]: ../../api/datar.base.trig_hb/#datar.base.trig_hb.tanpi
+[107]: ../../api/datar.base.trig_hb/#datar.base.trig_hb.cosh
+[108]: ../../api/datar.base.trig_hb/#datar.base.trig_hb.sinh
+[109]: ../../api/datar.base.trig_hb/#datar.base.trig_hb.tanh
+[110]: ../../api/datar.base.trig_hb/#datar.base.trig_hb.acosh
+[111]: ../../api/datar.base.trig_hb/#datar.base.trig_hb.asinh
+[112]: ../../api/datar.base.trig_hb/#datar.base.trig_hb.atanh
+[113]: ../../api/datar.base.funs/#datar.base.funs.cut
+[114]: ../../api/datar.base.funs/#datar.base.funs.identity
+[115]: ../../api/datar.base.funs/#datar.base.funs.expandgrid
+[116]: ../../api/datar.base.funs/#datar.base.funs.data_context
+[117]: ../../api/datar.base.arithmetic/#datar.base.arithmetic.prod
+[118]: ../../api/datar.base.arithmetic/#datar.base.arithmetic.sign
+[119]: ../../api/datar.base.arithmetic/#datar.base.arithmetic.trunc
+[120]: ../../api/datar.base.arithmetic/#datar.base.arithmetic.exp
+[121]: ../../api/datar.base.arithmetic/#datar.base.arithmetic.log
+[122]: ../../api/datar.base.arithmetic/#datar.base.arithmetic.log2
+[123]: ../../api/datar.base.arithmetic/#datar.base.arithmetic.log10
+[124]: ../../api/datar.base.arithmetic/#datar.base.arithmetic.log1p
+[125]: ../../api/datar.base.arithmetic/#datar.base.arithmetic.signif
+[126]: ../../api/datar.base.na/#datar.base.na.is_finite
+[127]: ../../api/datar.base.na/#datar.base.na.is_infinite
+[128]: ../../api/datar.base.na/#datar.base.na.is_nan
+[129]: ../../api/datar.base.seq/#datar.base.seq.match
+[130]: ../../api/datar.base.string/#datar.base.string.startswith
+[131]: ../../api/datar.base.string/#datar.base.string.endswith
+[132]: ../../api/datar.base.string/#datar.base.string.strtoi
+[133]: ../../api/datar.base.string/#datar.base.string.chartr
+[134]: ../../api/datar.base.string/#datar.base.string.tolower
+[135]: ../../api/datar.base.string/#datar.base.string.toupper
+[136]: ../../api/datar.base.verbs/#datar.base.verbs.max_col
+[137]: ../../api/datar.base.verbs/#datar.base.verbs.complete_cases
+[138]: ../../api/datar.base.funs/#datar.base.funs.make_names
+[139]: ../../api/datar.base.funs/#datar.base.funs.make_unique
diff --git a/pyproject.toml b/pyproject.toml
index 8213f03e..77761242 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "datar"
-version = "0.4.3"
+version = "0.4.4"
 description = "Port of dplyr and other related R packages in python, using pipda."
 authors = ["pwwang <pwwang@pwwang.com>"]
 readme = "README.md"
@@ -17,6 +17,7 @@ varname = "*"
 pandas = "^1.2"
 scipy = { version = "^1.6", optional = true }
 wcwidth = { version = "^0.2", optional = true }
+python-slugify = {version = "^5.0.2", optional = true}
 
 [tool.poetry.dev-dependencies]
 pytest = "*"
diff --git a/requirements.txt b/requirements.txt
index 41361fc6..8c4d954e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,6 +4,7 @@ pandas==1.*,>=1.2.0
 pipda
 pytest
 pytest-cov
+python-slugify==5.*,>=5.0.2
 scipy==1.*,>=1.6.0
 varname
 wcwidth==0.*,>=0.2.0
diff --git a/setup.py b/setup.py
index 32d795fe..5823dacf 100644
--- a/setup.py
+++ b/setup.py
@@ -24,19 +24,16 @@
 setup(
     long_description=readme,
     name='datar',
-    version='0.4.3',
+    version='0.4.4',
     description='Port of dplyr and other related R packages in python, using pipda.',
     python_requires='==3.*,>=3.7.1',
-    project_urls={"homepage": "https://github.com/pwwang/datar",
-                  "repository": "https://github.com/pwwang/datar"},
+    project_urls={"homepage": "https://github.com/pwwang/datar", "repository": "https://github.com/pwwang/datar"},
     author='pwwang',
     author_email='pwwang@pwwang.com',
     license='MIT',
-    packages=['datar', 'datar.base', 'datar.core', 'datar.datar', 'datar.datasets',
-              'datar.dplyr', 'datar.stats', 'datar.tibble', 'datar.tidyr', 'datar.utils'],
+    packages=['datar', 'datar.base', 'datar.core', 'datar.datar', 'datar.datasets', 'datar.dplyr', 'datar.stats', 'datar.tibble', 'datar.tidyr', 'datar.utils'],
     package_dir={"": "."},
     package_data={"datar.datasets": ["*.gz"]},
-    install_requires=['diot', 'executing', 'pandas==1.*,>=1.2.0',
-                      'pipda', 'scipy==1.*,>=1.6.0', 'varname', 'wcwidth==0.*,>=0.2.0'],
+    install_requires=['diot', 'executing', 'pandas==1.*,>=1.2.0', 'pipda', 'python-slugify==5.*,>=5.0.2', 'scipy==1.*,>=1.6.0', 'varname', 'wcwidth==0.*,>=0.2.0'],
     extras_require={"dev": ["pytest", "pytest-cov"]},
 )
diff --git a/tests/test_base_funs.py b/tests/test_base_funs.py
index 5ae808c0..c9e741c7 100644
--- a/tests/test_base_funs.py
+++ b/tests/test_base_funs.py
@@ -81,3 +81,19 @@ def test_outer():
         ["11", "12", "13"],
         ["21", "22", "23"]
     ]))
+
+def test_make_names():
+    names = ["a", "1aA b", "_1aA b"]
+    assert_iterable_equal(
+        make_names(names),
+        ['a', '_1aA_b', '_1aA_b']
+    )
+    assert_iterable_equal(
+        make_names(names, unique=True),
+        ['a', '_1aA_b__2', '_1aA_b__3']
+    )
+    assert_iterable_equal(
+        make_unique(names),
+        ['a', '_1aA_b__2', '_1aA_b__3']
+    )
+    assert make_names(1) == ['_1']