diff --git a/python/datafusion/expr.py b/python/datafusion/expr.py
index 84e9d4ebb..3750eeb3f 100644
--- a/python/datafusion/expr.py
+++ b/python/datafusion/expr.py
@@ -24,7 +24,6 @@
 
 from typing import TYPE_CHECKING, Any, ClassVar, Optional
 
-import functions as F
 import pyarrow as pa
 
 try:
@@ -614,58 +613,84 @@ def over(self, window: Window) -> Expr:
 
     def asin(self) -> Expr:
         """Returns the arc sine or inverse sine of a number."""
+        from . import functions as F
+
         return F.asin(self)
 
     def array_pop_back(self) -> Expr:
         """Returns the array without the last element."""
+        from . import functions as F
+
         return F.array_pop_back(self)
 
     def reverse(self) -> Expr:
         """Reverse the string argument."""
+        from . import functions as F
+
         return F.reverse(self)
 
     def bit_length(self) -> Expr:
         """Returns the number of bits in the string argument."""
+        from . import functions as F
+
         return F.bit_length(self)
 
     def array_length(self) -> Expr:
         """Returns the length of the array."""
+        from . import functions as F
+
         return F.array_length(self)
 
     def array_ndims(self) -> Expr:
         """Returns the number of dimensions of the array."""
+        from . import functions as F
+
         return F.array_ndims(self)
 
     def to_hex(self) -> Expr:
         """Converts an integer to a hexadecimal string."""
+        from . import functions as F
+
         return F.to_hex(self)
 
     def array_dims(self) -> Expr:
         """Returns an array of the array's dimensions."""
+        from . import functions as F
+
         return F.array_dims(self)
 
     def from_unixtime(self) -> Expr:
         """Converts an integer to RFC3339 timestamp format string."""
+        from . import functions as F
+
         return F.from_unixtime(self)
 
     def array_empty(self) -> Expr:
         """Returns a boolean indicating whether the array is empty."""
+        from . import functions as F
+
         return F.array_empty(self)
 
     def sin(self) -> Expr:
         """Returns the sine of the argument."""
+        from . import functions as F
+
         return F.sin(self)
 
     def log10(self) -> Expr:
         """Base 10 logarithm of the argument."""
+        from . import functions as F
+
         return F.log10(self)
 
     def initcap(self) -> Expr:
         """Set the initial letter of each word to capital.
 
-        Converts the first letter of each word in ``string`` to uppercase and the remaining
-        characters to lowercase.
+        Converts the first letter of each word in ``string``
+        to uppercase and the remaining characters to lowercase.
         """
+        from . import functions as F
+
         return F.initcap(self)
 
     def list_distinct(self) -> Expr:
@@ -673,26 +698,38 @@ def list_distinct(self) -> Expr:
 
         This is an alias for :py:func:`array_distinct`.
         """
+        from . import functions as F
+
         return F.list_distinct(self)
 
     def iszero(self) -> Expr:
         """Returns true if a given number is +0.0 or -0.0 otherwise returns false."""
+        from . import functions as F
+
         return F.iszero(self)
 
     def array_distinct(self) -> Expr:
         """Returns distinct values from the array after removing duplicates."""
+        from . import functions as F
+
         return F.array_distinct(self)
 
     def arrow_typeof(self) -> Expr:
         """Returns the Arrow type of the expression."""
+        from . import functions as F
+
         return F.arrow_typeof(self)
 
     def length(self) -> Expr:
         """The number of characters in the ``string``."""
+        from . import functions as F
+
         return F.length(self)
 
     def lower(self) -> Expr:
         """Converts a string to lowercase."""
+        from . import functions as F
+
         return F.lower(self)
 
     def acos(self) -> Expr:
@@ -703,42 +740,62 @@ def acos(self) -> Expr:
         Expr
             A new expression representing the arc cosine of the input expression.
         """
+        from . import functions as F
+
         return F.acos(self)
 
     def ascii(self) -> Expr:
         """Returns the numeric code of the first character of the argument."""
+        from . import functions as F
+
         return F.ascii(self)
 
     def sha384(self) -> Expr:
         """Computes the SHA-384 hash of a binary string."""
+        from . import functions as F
+
         return F.sha384(self)
 
     def isnan(self) -> Expr:
         """Returns true if a given number is +NaN or -NaN otherwise returns false."""
+        from . import functions as F
+
         return F.isnan(self)
 
     def degrees(self) -> Expr:
         """Converts the argument from radians to degrees."""
+        from . import functions as F
+
         return F.degrees(self)
 
     def cardinality(self) -> Expr:
         """Returns the total number of elements in the array."""
+        from . import functions as F
+
         return F.cardinality(self)
 
     def sha224(self) -> Expr:
         """Computes the SHA-224 hash of a binary string."""
+        from . import functions as F
+
         return F.sha224(self)
 
     def asinh(self) -> Expr:
         """Returns inverse hyperbolic sine."""
+        from . import functions as F
+
         return F.asinh(self)
 
     def flatten(self) -> Expr:
         """Flattens an array of arrays into a single array."""
+        from . import functions as F
+
         return F.flatten(self)
 
     def exp(self) -> Expr:
         """Returns the exponential of the argument."""
+        from . import functions as F
+
         return F.exp(self)
 
     def abs(self) -> Expr:
@@ -749,50 +806,74 @@ def abs(self) -> Expr:
         Expr
             A new expression representing the absolute value of the input expression.
         """
+        from . import functions as F
+
         return F.abs(self)
 
     def btrim(self) -> Expr:
         """Removes all characters, spaces by default, from both sides of a string."""
+        from . import functions as F
+
         return F.btrim(self)
 
     def md5(self) -> Expr:
         """Computes an MD5 128-bit checksum for a string expression."""
+        from . import functions as F
+
         return F.md5(self)
 
     def octet_length(self) -> Expr:
         """Returns the number of bytes of a string."""
+        from . import functions as F
+
         return F.octet_length(self)
 
     def cosh(self) -> Expr:
         """Returns the hyperbolic cosine of the argument."""
+        from . import functions as F
+
         return F.cosh(self)
 
     def radians(self) -> Expr:
         """Converts the argument from degrees to radians."""
+        from . import functions as F
+
         return F.radians(self)
 
     def sqrt(self) -> Expr:
         """Returns the square root of the argument."""
+        from . import functions as F
+
         return F.sqrt(self)
 
     def character_length(self) -> Expr:
         """Returns the number of characters in the argument."""
+        from . import functions as F
+
         return F.character_length(self)
 
     def tanh(self) -> Expr:
         """Returns the hyperbolic tangent of the argument."""
+        from . import functions as F
+
         return F.tanh(self)
 
     def atan(self) -> Expr:
         """Returns inverse tangent of a number."""
+        from . import functions as F
+
         return F.atan(self)
 
     def rtrim(self) -> Expr:
         """Removes all characters, spaces by default, from the end of a string."""
+        from . import functions as F
+
         return F.rtrim(self)
 
     def atanh(self) -> Expr:
         """Returns inverse hyperbolic tangent."""
+        from . import functions as F
+
         return F.atanh(self)
 
     def list_dims(self) -> Expr:
@@ -800,26 +881,38 @@ def list_dims(self) -> Expr:
 
         This is an alias for :py:func:`array_dims`.
         """
+        from . import functions as F
+
         return F.list_dims(self)
 
     def sha256(self) -> Expr:
         """Computes the SHA-256 hash of a binary string."""
+        from . import functions as F
+
         return F.sha256(self)
 
     def factorial(self) -> Expr:
         """Returns the factorial of the argument."""
+        from . import functions as F
+
         return F.factorial(self)
 
     def acosh(self) -> Expr:
         """Returns inverse hyperbolic cosine."""
+        from . import functions as F
+
         return F.acosh(self)
 
     def floor(self) -> Expr:
         """Returns the nearest integer less than or equal to the argument."""
+        from . import functions as F
+
         return F.floor(self)
 
     def ceil(self) -> Expr:
         """Returns the nearest integer greater than or equal to argument."""
+        from . import functions as F
+
         return F.ceil(self)
 
     def list_length(self) -> Expr:
@@ -827,38 +920,56 @@ def list_length(self) -> Expr:
 
         This is an alias for :py:func:`array_length`.
         """
+        from . import functions as F
+
         return F.list_length(self)
 
     def upper(self) -> Expr:
         """Converts a string to uppercase."""
+        from . import functions as F
+
         return F.upper(self)
 
     def chr(self) -> Expr:
         """Converts the Unicode code point to a UTF8 character."""
+        from . import functions as F
+
         return F.chr(self)
 
     def ln(self) -> Expr:
         """Returns the natural logarithm (base e) of the argument."""
+        from . import functions as F
+
         return F.ln(self)
 
     def tan(self) -> Expr:
         """Returns the tangent of the argument."""
+        from . import functions as F
+
         return F.tan(self)
 
     def array_pop_front(self) -> Expr:
         """Returns the array without the first element."""
+        from . import functions as F
+
         return F.array_pop_front(self)
 
     def cbrt(self) -> Expr:
         """Returns the cube root of a number."""
+        from . import functions as F
+
         return F.cbrt(self)
 
     def sha512(self) -> Expr:
         """Computes the SHA-512 hash of a binary string."""
+        from . import functions as F
+
         return F.sha512(self)
 
     def char_length(self) -> Expr:
         """The number of characters in the ``string``."""
+        from . import functions as F
+
         return F.char_length(self)
 
     def list_ndims(self) -> Expr:
@@ -866,38 +977,56 @@ def list_ndims(self) -> Expr:
 
         This is an alias for :py:func:`array_ndims`.
         """
+        from . import functions as F
+
         return F.list_ndims(self)
 
     def trim(self) -> Expr:
         """Removes all characters, spaces by default, from both sides of a string."""
+        from . import functions as F
+
         return F.trim(self)
 
     def cos(self) -> Expr:
         """Returns the cosine of the argument."""
+        from . import functions as F
+
         return F.cos(self)
 
     def sinh(self) -> Expr:
         """Returns the hyperbolic sine of the argument."""
+        from . import functions as F
+
         return F.sinh(self)
 
     def empty(self) -> Expr:
         """This is an alias for :py:func:`array_empty`."""
+        from . import functions as F
+
         return F.empty(self)
 
     def ltrim(self) -> Expr:
         """Removes all characters, spaces by default, from the beginning of a string."""
+        from . import functions as F
+
         return F.ltrim(self)
 
     def signum(self) -> Expr:
         """Returns the sign of the argument (-1, 0, +1)."""
+        from . import functions as F
+
         return F.signum(self)
 
     def log2(self) -> Expr:
         """Base 2 logarithm of the argument."""
+        from . import functions as F
+
         return F.log2(self)
 
     def cot(self) -> Expr:
         """Returns the cotangent of the argument."""
+        from . import functions as F
+
         return F.cot(self)