如何查看aiohttp版本？Ubuntu16.04下aiohttp版本查询问题

General Ways to Find aiohttp Version #

No matter what operating system you're on, these methods will reliably get your installed aiohttp version:

• Use the Python Interpreter:
  Open your terminal, type python (or python3 if you're working with Python 3) to enter the interactive shell, then run:

  import aiohttp
  print(aiohttp.__version__)
  

  This directly pulls the version number from the installed package in that Python environment.

• Use pip:
  If you installed aiohttp via pip, filter your installed packages to find aiohttp:

  • For Python 2: pip list | grep aiohttp
  • For Python 3: pip3 list | grep aiohttp
    Or get detailed package info including version with pip show aiohttp (or pip3 show aiohttp).

Fixing the Ubuntu 16.04 "command not found" Issue #

The error -bash: aiohttp: command not found is totally normal here—older versions of aiohttp don't include a command-line interface (CLI) tool, so running aiohttp -V won't work. Even newer versions might require extra setup for the CLI, so it's not a reliable way to check the version.

Since your system's default Python is 2.7.12, here's how to check the aiohttp version for that environment:

1. Check with pip for Python 2:
   Run pip show aiohttp in your terminal. If aiohttp is installed, you'll see output like this:

   Name: aiohttp
   Version: 3.8.4
   Location: /usr/local/lib/python2.7/dist-packages
   Requires: async-timeout, attrs, chardet, multidict, yarl
   

   If you get "Package(s) not found", that means aiohttp isn't installed for Python 2.7.

2. Check via Python 2 Shell:
   Launch Python 2 by typing python in your terminal, then run:

   import aiohttp
   print(aiohttp.__version__)
   

   If this throws an ImportError, aiohttp isn't installed in your Python 2 environment.

A quick note: Python 2 is no longer supported, so if you can, consider switching to Python 3. Install aiohttp for Python 3 with sudo pip3 install aiohttp, then check the version using pip3 show aiohttp or the Python 3 interpreter.

内容的提问来源于stack exchange，提问作者GoodtheBest