Drop the dependency on ansicolors

binder/requirements.txt

@@ -3,4 +3,3 @@ pandas
 matplotlib
 ipywidgets
 ipykernel
-ansicolors

papermill/exceptions.py

@@ -1,4 +1,4 @@
-from colors import strip_color
+import re
 
 
 class AwsError(Exception):
@@ -59,6 +59,26 @@ class PapermillParameterOverwriteWarning(PapermillWarning):
     """Callee overwrites caller argument to pass down the stream."""
 
 
+# The regular expression is copied from:
+# https://github.com/jonathaneunice/colors/blob/
+#    c965f5b9103c5bd32a1572adb8024ebe83278fb0/colors/colors.py#L122-L131
+#
+# The original docstring notes that this does not strip all possible ANSI
+# escape sequences related to color and style, but it attempts to cover the
+# most common ones and a few known oddities produced by actual colorization
+# libraries, including \x1b[K (EL, erase to end of line) and \x1b[m (more
+# commonly expressed as \x1b[0m).
+_COLORS = re.compile("\x1b\\[(K|.*?m)")
+
+
+def strip_color(text):
+    """Remove most ANSI color and style sequences from a string
+
+    Based on https://pypi.org/project/ansicolors/."""
+
+    return _COLORS.sub("", text)
+
+
 def missing_dependency_generator(package, dep):
     def missing_dep():
         raise PapermillOptionalDependencyException(

papermill/tests/test_execute.py

@@ -8,11 +8,10 @@
 from unittest.mock import ANY, patch
 
 import nbformat
-from colors import strip_color
 from nbformat import validate
 
 from .. import engines, translators
-from ..exceptions import PapermillExecutionError
+from ..exceptions import PapermillExecutionError, strip_color
 from ..execute import execute_notebook
 from ..iorw import load_notebook_node
 from ..log import logger

requirements.txt

@@ -7,4 +7,3 @@ requests
 entrypoints
 tenacity >= 5.0.2
 aiohttp >=3.9.0; python_version=="3.12"
-ansicolors