小白求助， Python 3.6.1 环境， selenium 执行定义浏览器异常

[xfw]

只有一个语句……
browser = webdriver.Chrome()

C:\python\autosign\venv\Scripts\python.exe C:/python/autosign/main.py
Traceback (most recent call last):
File "C:\python\autosign\venv\lib\site-packages\selenium\webdriver\common\service.py", line 76, in start
stdin=PIPE)
File "C:\Users\yuzhe\AppData\Local\Programs\Python\Python36\lib\subprocess.py", line 707, in __init__
restore_signals, start_new_session)
File "C:\Users\yuzhe\AppData\Local\Programs\Python\Python36\lib\subprocess.py", line 990, in _execute_child
startupinfo)
FileNotFoundError: [WinError 2] 系统找不到指定的文件。

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "C:/python/autosign/main.py", line 15, in <module>
browser = webdriver.Chrome()
File "C:\python\autosign\venv\lib\site-packages\selenium\webdriver\chrome\webdriver.py", line 68, in __init__
self.service.start()
File "C:\python\autosign\venv\lib\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: 'chromedriver' executable needs to be in PATH. Please see https://sites.google.com/a/chromium.org/chromedriver/home


Process finished with exit code 1

[andylsr]

异常写的很清楚了，Chrome 类有一个属性 executable，这个是浏览器驱动，要么在类实例化的时候指定，要么在环境变量中添加~~

[youngxu]

去搜一下 selenium+chrome...要用 chromedriver 的

[zeyexe]

到 http://chromedriver.chromium.org/downloads 下载 chromedriver，然后把 chromedriver 的路径加到 PATH 中，或者在代码中直接指定。

[kmahyyg]

老铁，发帖之前看看文档

[baday]

1、指定下载的浏览器驱动的地址。
2、如果不加参数就把驱动地址加到环境变量。

[towl]

写的很清楚了啊，没有设置 chromedriver 的环境变量

[mimvp]

根据提示信息，找不到 chrome 执行文件，需要下载 chromedriver，然后添加到 executable_path=chromedriver
chromedriver 下载地址： http://chromedriver.storage.googleapis.com/index.html

推荐填写完整的绝对路径，例如：
chromedriver = '/usr/local/bin/chromedriver'
browser = webdriver.Chrome(executable_path=chromedriver) # 打开 Chrome 浏览器


给出的完整代码如下：

from selenium import webdriver
from selenium.webdriver.common.proxy import *
from selenium.webdriver.chrome.options import Options
from selenium.webdriver.common.desired_capabilities import DesiredCapabilities
from pyvirtualdisplay import Display
# from xvfbwrapper import Xvfb

import bs4, os, re, time, zipfile
from base64 import b64encode

import sys
from posix import unlink
reload(sys)
sys.setdefaultencoding('utf8')


## webdriver + chrome （不使用代理，爬取网页）
def spider_url_chrome(url):
browser = None
display = None
try:
display = Display(visible=0, size=(800, 600))
display.start()
chromedriver = '/usr/local/bin/chromedriver'
browser = webdriver.Chrome(executable_path=chromedriver) # 打开 Chrome 浏览器
browser.get(url)
content = browser.page_source
print("content: " + str(content))
finally:
if browser: browser.quit()
if display: display.stop()


## webdriver + chrome + proxy + whiteip （无密码，或白名单 ip 授权）
## 米扑代理： https://proxy.mimvp.com
def spider_url_chrome_by_whiteip(url):
browser = None
display = None

## 白名单 ip，请见米扑代理会员中心： https://proxy.mimvp.com/usercenter/userinfo.php?p=whiteip
mimvp_proxy = {
'ip' : '140.143.62.84', # ip
'port_https' : 62288, # http, https
'port_socks' : 62287, # socks5
'username' : 'mimvp-user',
'password' : 'mimvp-pass'
}

try:
display = Display(visible=0, size=(800, 600))
display.start()

chrome_options = Options() # ok
chrome_options = webdriver.ChromeOptions() # ok
proxy_https_argument = '--proxy-server=http://{ip}:{port}'.format(ip=mimvp_proxy['ip'], port=mimvp_proxy['port_https']) # http, https (无密码，或白名单 ip 授权，成功)
chrome_options.add_argument(proxy_https_argument)
# proxy_socks_argument = '--proxy-server=socks5://{ip}:{port}'.format(ip=mimvp_proxy['ip'], port=mimvp_proxy['port_socks']) # socks5 (无密码，或白名单 ip 授权，失败)
# chrome_options.add_argument(proxy_socks_argument)

chromedriver = '/usr/local/bin/chromedriver'
browser = webdriver.Chrome(executable_path=chromedriver, chrome_options=chrome_options) # 打开 Chrome 浏览器
browser.get(url)
content = browser.page_source
print("content: " + str(content))
finally:
if browser: browser.quit()
if display: display.stop()

[mimvp]

完整的代码示例，可以参考 github：
https://github.com/mimvp/mimvp-proxy-demo/tree/master/SeleniumPython/python_selenium_chrome