move fix_signature to utils

it will be reused now.

alive_progress/animations/spinner_compiler.py

@@ -1,14 +1,13 @@
 import operator
 import random
 import time
-from functools import update_wrapper
 from inspect import signature
 from itertools import chain, count, islice, repeat
 from types import SimpleNamespace
-from typing import Callable
 
 from about_time import about_time
 
+from .utils import fix_signature
 from ..utils.cells import fix_cells, is_wide, join_cells, strip_marks, to_cells
 from ..utils.colors import BLUE, BLUE_BOLD, CYAN, DIM, GREEN, ORANGE, ORANGE_BOLD, RED, YELLOW_BOLD
 from ..utils.terminal import hide_cursor, show_cursor
@@ -66,16 +65,6 @@ def inner_schedule(*args, **kwargs):
     return inner_controller
 
 
-def fix_signature(func: Callable, source: Callable, skip_n_params: int):
-    """Override signature to hide first n parameters."""
-    doc = () if func.__doc__ else ('__doc__',)
-    update_wrapper(func, source, assigned=('__module__', '__name__', '__qualname__') + doc)
-    sig = signature(func)
-    sig = sig.replace(parameters=tuple(sig.parameters.values())[skip_n_params:])
-    func.__signature__ = sig
-    return func
-
-
 """
 The commands here are made available in the compiler controller, thus in all spinners.
 

alive_progress/animations/utils.py

@@ -1,6 +1,8 @@
 import math
-from functools import reduce, wraps
+from functools import reduce, update_wrapper, wraps
+from inspect import signature
 from itertools import accumulate, chain, repeat
+from typing import Callable
 
 from ..utils.cells import combine_cells, fix_cells, mark_graphemes, split_graphemes
 
@@ -108,3 +110,13 @@ def spread_weighted(actual_length, naturals):
     lengths = tuple(map(lambda a, b: a - b, lengths, [0] + lengths))
     assert sum(lengths) == actual_length
     return lengths
+
+
+def fix_signature(func: Callable, source: Callable, skip_n_params: int):
+    """Override signature to hide first n parameters."""
+    doc = () if func.__doc__ else ('__doc__',)
+    update_wrapper(func, source, assigned=('__module__', '__name__', '__qualname__') + doc)
+    sig = signature(func)
+    sig = sig.replace(parameters=tuple(sig.parameters.values())[skip_n_params:])
+    func.__signature__ = sig
+    return func