title: Python can't find installed module ('slackclient')
body: <p>I am trying to build a slack bot for learning purpose but when I run the script get this error <code>ModuleNotFoundError: No module named 'slackclient'</code></p>
  
  <p>I tried install and uninstall and then re-install with <code>python -m pip install slackclient</code></p>
  
  <pre><code>import os
  import time
  import re
  from slackclient import SlackClient
  
  # instantiate Slack client
  slack_client = SlackClient(os.environ.get('SLACK_BOT_TOKEN'))
  
  if __name__ == "__main__":
      if slack_client.rtm_connect(with_team_state=False):
          print("Starter Bot connected and running!")
          #Read bot's user ID by calling Web API method 'auth.test'
          starterbot_id = slack_client.api_call("auth.test")["user_id"]
          while True:
              command, channel = parse_bot_commands(slackclient.rtm_read())
              if command:
                  handle_command(command, channel)
              time.sleep(RTM_READ_DELAY)
      else:
          print("Connection failed. Exception traceback printed above.")
  
  
  (STARTE~1) C:\Users\enest\Desktop\Slack Bot\starterbot&gt;python starterbot.py
  Traceback (most recent call last):
    File "starterbot.py", line 4, in &lt;module&gt;
      from slackclient import SlackClient
  ModuleNotFoundError: No module named 'slackclient'
  
  (STARTE~1) C:\Users\enest\Desktop\Slack Bot\starterbot&gt;pip install slackclient
  Requirement already satisfied: slackclient in c:\users\enest\desktop\slackb~1\starte~1\lib\site-packages (2.1.0)
  Requirement already satisfied: aiohttp&gt;3.5.2 in c:\users\enest\desktop\slackb~1\starte~1\lib\site-packages (from slackclient) (3.5.4)
  Requirement already satisfied: chardet&lt;4.0,&gt;=2.0 in c:\users\enest\desktop\slackb~1\starte~1\lib\site-packages (from aiohttp&gt;3.5.2-&gt;slackclient) (3.0.4)
  Requirement already satisfied: async-timeout&lt;4.0,&gt;=3.0 in c:\users\enest\desktop\slackb~1\starte~1\lib\site-packages (from aiohttp&gt;3.5.2-&gt;slackclient) (3.0.1)
  Requirement already satisfied: multidict&lt;5.0,&gt;=4.0 in c:\users\enest\desktop\slackb~1\starte~1\lib\site-packages (from aiohttp&gt;3.5.2-&gt;slackclient) (4.5.2)
  Requirement already satisfied: yarl&lt;2.0,&gt;=1.0 in c:\users\enest\desktop\slackb~1\starte~1\lib\site-packages (from aiohttp&gt;3.5.2-&gt;slackclient) (1.3.0)
  Requirement already satisfied: attrs&gt;=17.3.0 in c:\users\enest\desktop\slackb~1\starte~1\lib\site-packages (from aiohttp&gt;3.5.2-&gt;slackclient) (19.1.0)
  Requirement already satisfied: idna&gt;=2.0 in c:\users\enest\desktop\slackb~1\starte~1\lib\site-packages (from yarl&lt;2.0,&gt;=1.0-&gt;aiohttp&gt;3.5.2-&gt;slackclient) (2.8)
  </code></pre>