Downloads the latest chrome webdriver, works on all platforms.

chromeDriver.py

import os, platform, requests, zipfile
import xml.etree.ElementTree as ET

cwd = os.getcwd()
getArch = platform.architecture()
xmlUrl = "https://chromedriver.storage.googleapis.com/"
zipName = []

XML = requests.get(xmlUrl, stream=True)
tree = ET.parse(XML.raw)
root = tree.getroot()

if platform.system() == 'Windows':
    for elem in root.iter():
        if elem.text is not None and "chromedriver_win32.zip" in elem.text:
            zipName.append(elem.text)
            
    r = requests.get(xmlUrl+zipName[-1], allow_redirects=True)
    open('chromedriver_win32.zip', 'wb').write(r.content)
    
    zipper = zipfile.ZipFile("chromedriver_win32.zip", 'r')
    zipper.extractall(cwd)
    zipper.close()
    
    os.remove("chromedriver_win32.zip")

if platform.system() == 'Darwin':
    for elem in root.iter():
        if elem.text is not None and "chromedriver_mac32.zip" in elem.text:
            zipName.append(elem.text)
            
    r = requests.get(xmlUrl+zipName[-1], allow_redirects=True)
    open('chromedriver_mac32.zip', 'wb').write(r.content)
    
    zipper = zipfile.ZipFile("chromedriver_mac32.zip", 'r')
    zipper.extractall(cwd)
    zipper.close()
    
    os.remove("chromedriver_mac32.zip")
    
if platform.system() == 'Linux':
    if getArch[0] == '64bit': 
        for elem in root.iter():
            if elem.text is not None and "chromedriver_linux64.zip" in elem.text:
                zipName.append(elem.text)
        r = requests.get(xmlUrl+zipName[-1], allow_redirects=True)
        open('chromedriver_linux64.zip', 'wb').write(r.content)

        zipper = zipfile.ZipFile("chromedriver_linux64.zip", 'r')
        zipper.extractall(cwd)
        zipper.close()

        os.remove("chromedriver_linux64.zip")
    else: 
        for elem in root.iter():
            if elem.text is not None and "chromedriver_linux32.zip" in elem.text:
                zipName.append(elem.text)
        r = requests.get(xmlUrl+zipName[-1], allow_redirects=True)
        open('chromedriver_linux32.zip', 'wb').write(r.content)

        zipper = zipfile.ZipFile("chromedriver_linux32.zip", 'r')
        zipper.extractall(cwd)
        zipper.close()

        os.remove("chromedriver_linux32.zip")