import matplotlib.pyplot as plt
import numpy as np
import win32com.client as win32
from win32com import client
a=plt.scatter( np.linspace(1,10,10),np.linspace(2,20,10) )
wordApp = win32.gencache.EnsureDispatch('Word.Application') #create a word application object
word = client.Dispatch("Word.Application")
wordApp.Visible = False # hide the word application
doc = word.Documents.Open(r'C:\report.docx') # opening the template file
rng=doc.Bookmarks("unm_3").Range # change the string Name to whatever name of your bookmarks
rng.InsertAfter("Hello World")
plt.show()