Highlight certain words of a paragraph to bold

[latheefS]

I've multiple paragraphs in which i need to make few words as bold and insert into word. For which i had tried the below method for a single paragraph.

import docx from docx import Document

start_bold = "\033[1m" end_bold = "\033[0m"

doc = docx.Document()

IntroPara = "This document details the results of the Quarterly Update Testing. As per Oracle’s timetable for quarterly releases for wave , the upgrade took place on non-production environments on the <day(dd/mm/yy)>, and into the production environment on the <day(dd/mm/yy)>."

words_to_highlight = ["", "", "<day(dd/mm/yy)>"]

for word in words_to_highlight: IntroPara = IntroPara.replace(word, f"{start_bold}{word}{end_bold}")

IntPara = IntroPara

print(IntPara) doc.add_paragraph(IntPara) doc.save('Report.docx')

this gives me highlted words but when i try to save it as a paragraph in word it is throwing below error.

### errors: This document details the results of the Quarterly Update Testing. As per Oracle’s timetable for quarterly releases for wave , the upgrade took place on non-production environments on the <day(dd/mm/yy)>, and into the production environment on the <day(dd/mm/yy)>. Traceback (most recent call last): File "C:\Users\TSTUSER\PycharmProjects\Test\parag.py", line 21, in doc.add_paragraph(IntPara) File "C:\Users\TSTUSER\PycharmProjects\test.venv\Lib\site-packages\docx\document.py", line 69, in add_paragraph return self._body.add_paragraph(text, style) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\TSTUSER\PycharmProjects\test.venv\Lib\site-packages\docx\blkcntnr.py", line 55, in add_paragraph paragraph.add_run(text) File "C:\Users\TSTUSER\PycharmProjects\test.venv\Lib\site-packages\docx\text\paragraph.py", line 41, in add_run run.text = text ^^^^^^^^ File "C:\Users\TSTUSER\PycharmProjects\test.venv\Lib\site-packages\docx\text\run.py", line 213, in text self._r.text = text ^^^^^^^^^^^^ File "C:\Users\TSTUSER\PycharmProjects\test.venv\Lib\site-packages\docx\oxml\text\run.py", line 129, in text _RunContentAppender.append_to_run_from_text(self, text) File "C:\Users\TSTUSER\PycharmProjects\test.venv\Lib\site-packages\docx\oxml\text\run.py", line 248, in append_to_run_from_text appender.add_text(text) File "C:\Users\TSTUSER\PycharmProjects\test.venv\Lib\site-packages\docx\oxml\text\run.py", line 254, in add_text self.flush() File "C:\Users\TSTUSER\PycharmProjects\test.venv\Lib\site-packages\docx\oxml\text\run.py", line 275, in flush self._r.add_t(text) File "C:\Users\TSTUSER\PycharmProjects\test.venv\Lib\site-packages\docx\oxml\text\run.py", line 41, in add_t t = self._add_t(text=text) ^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\TSTUSER\PycharmProjects\test.venv\Lib\site-packages\docx\oxml\xmlchemy.py", line 300, in _add_child setattr(child, key, value) File "src\lxml\etree.pyx", line 1063, in lxml.etree._Element.text.set File "src\lxml\apihelpers.pxi", line 749, in lxml.etree._setNodeText File "src\lxml\apihelpers.pxi", line 737, in lxml.etree._createTextNode File "src\lxml\apihelpers.pxi", line 1530, in lxml.etree._utf8 ValueError: All strings must be XML compatible: Unicode or ASCII, no NULL bytes or control characters

Please help me with a fix or alternate way to highlighted words inside the paragraph instead of addrun.