UnboundLocalError from Splinter?

Question

I installed Firefox and using Ubuntu 18.04.

from splinter import Browser

with Browser() as browser:
    # Visit URL
    url = "http://www.google.com"
    browser.visit(url)

Results in:

Traceback (most recent call last):
  File "test.py", line 3, in <module>
    with Browser() as browser:
  File "/home/sebastian/PycharmProjects/SupremeBot/venv/lib/python3.6/site-packages/splinter/browser.py", line 90, in Browser
    return get_driver(driver, *args, **kwargs)
  File "/home/sebastian/PycharmProjects/SupremeBot/venv/lib/python3.6/site-packages/splinter/browser.py", line 68, in get_driver
    raise e
UnboundLocalError: local variable 'e' referenced before assignment
Traceback (most recent call last):
  File "test.py", line 3, in <module>
    with Browser() as browser:
  File "/home/sebastian/PycharmProjects/SupremeBot/venv/lib/python3.6/site-packages/splinter/browser.py", line 90, in Browser
    return get_driver(driver, *args, **kwargs)
  File "/home/sebastian/PycharmProjects/SupremeBot/venv/lib/python3.6/site-packages/splinter/browser.py", line 68, in get_driver
    raise e
UnboundLocalError: local variable 'e' referenced before assignment
Traceback (most recent call last):
  File "test.py", line 3, in <module>
    with Browser() as browser:
  File "/home/sebastian/PycharmProjects/SupremeBot/venv/lib/python3.6/site-packages/splinter/browser.py", line 90, in Browser
    return get_driver(driver, *args, **kwargs)
  File "/home/sebastian/PycharmProjects/SupremeBot/venv/lib/python3.6/site-packages/splinter/browser.py", line 68, in get_driver
    raise e
UnboundLocalError: local variable 'e' referenced before assignment

I'm not sure how to solve this problem. I checked the documentation from Splinter but there is no hint for this error.

What I am doing wrong ?

After updating the Stringer Lib:

Traceback (most recent call last):
  File "test.py", line 3, in <module>
    with Browser() as browser:
  File "/home/sebastian/PycharmProjects/SupremeBot/venv/lib/python3.6/site-packages/splinter/browser.py", line 92, in Browser
    return get_driver(driver, *args, **kwargs)
  File "/home/sebastian/PycharmProjects/SupremeBot/venv/lib/python3.6/site-packages/splinter/browser.py", line 70, in get_driver
    raise err
  File "/home/sebastian/PycharmProjects/SupremeBot/venv/lib/python3.6/site-packages/splinter/browser.py", line 66, in get_driver
    return driver(*args, **kwargs)
  File "/home/sebastian/PycharmProjects/SupremeBot/venv/lib/python3.6/site-packages/splinter/driver/webdriver/firefox.py", line 88, in __init__
    **kwargs
  File "/home/sebastian/PycharmProjects/SupremeBot/venv/lib/python3.6/site-packages/selenium/webdriver/firefox/webdriver.py", line 164, in __init__
    self.service.start()
  File "/home/sebastian/PycharmProjects/SupremeBot/venv/lib/python3.6/site-packages/selenium/webdriver/common/service.py", line 83, in start
    os.path.basename(self.path), self.start_error_message)
selenium.common.exceptions.WebDriverException: Message: 'geckodriver' executable needs to be in PATH.

It looks like you're using an outdated version though, as the [code on Github](https://github.com/cobrateam/splinter/blob/35c9227f4924bad83e4864ed91a58f9d7d94ca43/splinter/browser.py#L55) doesn't even have that line. This may have been a bug that they patched already. — Carcigenicate, Dec 27 '19 at 22:27
@Carcigenicate thank you for your reply ! I updated my Stringer Lib with the code from Github. Now i get new Error which i cant explain.. — Lapinski, Dec 28 '19 at 19:52

score 1 · Answer 1 · answered Dec 28 '19 at 20:36

1

Finally it works ! I had to update the Splinter lib from Github and put the Geckodriver file into the /usr/bin

answered Dec 28 '19 at 20:36

Lapinski

21
1
4

Hi @Lapinski, I'm facing the same problem. I updated splinter using git but I'm running windows, so what's equivelant for /user/bin? – E. Aly Feb 21 '20 at 04:48

score 1 · Answer 2 · answered Jun 22 '20 at 22:51

First, check your chrome version, by going to "Help-About Google Chrome".

Second, go to https://chromedriver.chromium.org/ AND download the version that matched your current Google Chrome.

Third, then put the Chromedriver into your bin.

For Mac-users, open Finder, then do shift+command+G, and then type "/usr/local/bin/"

Lemon · Answer 3 · 2020-06-24T04:16:55.610

I had the same issue. I realized that the pip install of splinter had a bug in the get_broswer() function in the splinter/browser.py file.

pip install version of splinter that gave error UnboundLocalError: local variable 'e' referenced before assignment:

def get_driver(driver, retry_count=3, *args, **kwargs):
"""Try to instantiate the driver.

Common selenium errors are caught and a retry attempt occurs.
This can mitigate issues running on Remote WebDriver.

"""

    for _ in range(retry_count):
        try:
            return driver(*args, **kwargs)
    except (IOError, HTTPException, WebDriverException, MaxRetryError) as e:
        pass

    raise e

GitHub version:

def get_driver(driver, retry_count=3, *args, **kwargs):
"""Try to instantiate the driver.

Common selenium errors are caught and a retry attempt occurs.
This can mitigate issues running on Remote WebDriver.

"""
    err = None
    for _ in range(retry_count):
        try:
            return driver(*args, **kwargs)
        except (IOError, HTTPException, WebDriverException, MaxRetryError) as e:
            err = e

    raise err

After updating to the GitHub version, I was able to find the real root cause problem, which was that I was using an older version of setting up chromedriver. I found a good solution here for that issue.

In this solution, Navarasu suggests you pip install webdriver-manager, then you can call your browser as follows:

from splinter import Browser
from webdriver_manager.chrome import ChromeDriverManager

executable_path = {'executable_path': ChromeDriverManager().install()}
browser = Browser('chrome', **executable_path)

A similar approach can be used for Firefox.

score 0 · Answer 4 · answered Jan 09 '20 at 13:42

I had the same issues. I reverted back to splinter-0.11.0.

To expand on the last issue for Windows: Download the appropriate geckodriver (https://github.com/mozilla/geckodriver/releases) and put the geckodriver.exe file into the location your PATH variable is referring to.

score 0 · Answer 5 · answered Jul 24 '20 at 00:30

Using Chrome on Windows 10, I made two edits and I'm not sure which one solved the error.

I downgraded my chrome driver version (to one lower than my current version). I added this line of code.

executable_path = {'executable_path': '/usr/bin/chromedriver'}
browser = Browser('chrome', **executable_path, headless=False)

UnboundLocalError from Splinter?

5 Answers5