Enabling API key handling (MissingKeyMapError) about gmplot HOT 7 CLOSED

import gmplot

gmap = gmplot.GoogleMapPlotter(37.428, -122.145, 16)
gmap.draw("mymap.html")    
# "mymap.html" will NOT open

from bs4 import BeautifulSoup

def insertapikey(fname, apikey):
    """put the google api key in a html file"""
    def putkey(htmltxt, apikey, apistring=None):
        """put the apikey in the htmltxt and return soup"""
        if not apistring:
            apistring = "https://maps.googleapis.com/maps/api/js?key=%s&callback=initMap"
        soup = BeautifulSoup(htmltxt, 'html.parser')
        body = soup.body
        src = apistring % (apikey, )
        tscript = soup.new_tag("script", src=src, async="defer")
        body.insert(-1, tscript)
        return soup
    htmltxt = open(fname, 'r').read()
    soup = putkey(htmltxt, apikey)
    newtxt = soup.prettify()
    open(fname, 'w').write(newtxt)

insertapikey("mymap.html", apikey)
# "mymap.html" will open

   #gmap does not have a apikey function, so lets substitute it. 
    tempHolder=''
    oldLine='<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?libraries=visualization&sensor=true_or_false"></script>'
    newLine='<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?libraries=visualization&sensor=true_or_false&key=yourKeyHere"></script>'
    #Open the file created by gmplot, do a find and replace. 
    #My file is in flask, so it is in static/map.html, change path to your file
    with open('static/map.html') as fh:
            for line in fh:
                    tempHolder += line.replace(oldLine,newLine)
    fh.close
   #Now open the file again and overwrite with the edited text
    fh=open('static/map.html', 'w')
    fh.write(tempHolder)
    fh.close

def putkey(htmltxt, apikey, apistring=None):
    """put the apikey in the htmltxt and return soup"""
    if not apistring:
        apistring = "https://maps.googleapis.com/maps/api/js?key=%s&callback=initialize&libraries=visualization&sensor=true_or_false"
    soup = BeautifulSoup(htmltxt, 'html.parser')
    soup.script.decompose() #remove the existing script tag
    body = soup.body
    src = apistring % (apikey,)
    tscript = soup.new_tag("script", src=src, async="defer")
    body.insert(-1, tscript)
    return soup

htmltxt = open(fname, 'r').read()
soup = putkey(htmltxt, apikey)
newtxt = soup.prettify()
open(fname, 'w').write(newtxt)
print('\nKey Insertion Completed!!')