replace.py

 def docx_replace_substring(doc_obj, template_str, value_str, max_cnt=100):
 was_found = True
 while (max_cnt > 0) and (was_found):
 was_found = False
 for p in doc_obj.paragraphs:
 pos = p.text.find(template_str)
 if pos >= 0:
 was_found = True
 inline = p.runs
 pos_end = len(template_str)
 # Loop added to work with runs (strings with same style)
 for i in range(len(inline)):
 if pos_end == 0:
 #replace completed
 break
 if (pos_end > 0) and (pos_end < len(template_str)):
 #part of srting in another run, delete from start
 part_len = min(len(inline[i].text), pos_end) # length of part that in this run
 inline[i].text = inline[i].text[part_len:]
 pos_end = pos_end - part_len
 if pos - len(inline[i].text) < 0:
 # Use slicing to extract those parts of the original string to be kept
 part_len = min(len(inline[i].text) - pos, len(template_str)) # length of part that in this run
 inline[i].text = inline[i].text[:pos] + value_str + inline[i].text[(pos+part_len):]
 pos_end = pos_end - part_len
 else:
 pos = pos - len(inline[i].text)
 max_cnt -= 1

 for table in doc_obj.tables:
 for row in table.rows:
 for cell in row.cells:
 docx_replace_substring(cell, template_str, value_str, max_cnt)
 
filename = 'doctestx.docx'
doc = docx.Document(filename)
docx_replace_substring(doc, r'text_to_replace', replace1)
docx_replace_substring(doc, r'text_to_replace2', replace2)
doc.save('generated_doc1.docx')