selenium.common.exceptions.WebDriverException: Message: Can not connect to the Service chromedriver.exe while opening chrome browser

At a first glance to your code trial it seems there is a minor bug in the value of the argument executable_path. Instead of hromedriver.exe it should have been:

# Windows OS
driver = webdriver.Chrome(executable_path=r'C:\path\to\chromedriver.exe')
# Linux OS
driver = webdriver.Chrome(executable_path="/path/to/chromedriver")

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This error message…

selenium.common.exceptions.WebDriverException: Message: Can not connect to the Service chromedriver.exe

…implies that the the program/script was unable to initiate/spawn the ChromeDriverService through chromedriver.exe.

The potential reason for the error can be:

• Due to missing the entry 127.0.0.1 localhost in /etc/hosts

Solution

• Windows OS – Add 127.0.0.1 localhost to /etc/hosts

• Mac OSX – Ensure the following entries:

  127.0.0.1   localhost
  255.255.255.255 broadcasthost
  ::1 localhost
  fe80::1%lo0 localhost   
  

References

As per the discussion in selenium.common.exceptions.WebDriverException: Message: Can not connect to the Service geckodriver:

• Selenium does not require 127.0.0.1 localhost to be explicitly set in the host file.
• However it is mandatory requirement to map localhost to the IPv4 local loopback (127.0.0.1)
• The mechanism of this mapping does not have to be through the hosts file always.
• On Windows OS systems it is not mapped in the hosts file at all (resolving localhost is done by the DNS resolver).

TL;DR

How to reset the Hosts file back to the default