title: How to put geckodriver into PATH?
body: <p>I'm on OS Sierra and i'm running Python 3.5.2. I have selenium installed and i'm following a book called "Automate the Boring Tasks With Python"</p>
  
  <p>My code is </p>
  
  <pre><code>from selenium import webdriver
  &gt;&gt;&gt; browser = webdriver.Firefox()
  </code></pre>
  
  <p>I keep receiving the error </p>
  
  <pre><code>Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/selenium/webdriver/common/service.py", line 64, in start
  stdout=self.log_file, stderr=self.log_file)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/subprocess.py", line 947, in __init__
  restore_signals, start_new_session)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/subprocess.py", line 1551, in _execute_child
  raise child_exception_type(errno_num, err_msg)
  FileNotFoundError: [Errno 2] No such file or directory: 'geckodriver'
  
  During handling of the above exception, another exception occurred:
  
  Traceback (most recent call last):
  File "&lt;pyshell#1&gt;", line 1, in &lt;module&gt;
  browser = webdriver.Firefox()
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/selenium/webdriver/firefox/webdriver.py", line 135, in __init__
  self.service.start()
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/selenium/webdriver/common/service.py", line 71, in start
  os.path.basename(self.path), self.start_error_message)
  selenium.common.exceptions.WebDriverException: Message: 'geckodriver' executable needs to be in PATH. 
  </code></pre>
  
  <p>I have searched far and wide for solutions to my issue. Many people have the same issue.. but none of the solutions are working. I have geckodriver copied everywhere in my Python folders. I've tried using terminal and I have tried specifying the path within the code and it still gives me errors. I hope somebody can help me. I'm sorry if this is in the wrong format, I don't know what i'm doing.</p>