Detailed graphic explanation of twisted module installation in python

Twisted is an event driven network framework.

I recently started to learn about Twisted. First I must install the twisted module.

But when executing under cmd: pip install twisted

, the following problem occurred: "error:Microsoft Visual C++ 10.0 is required (Unable to find vcvarsall.bat)

My computer is a pyhton3.4 environment (python2.7 is also available), VC++ 10.0 is not installed, so according to the error prompt, I have to install VC++ 10.0?

But I don’t want to~, so I searched a lot on the Internet and read many other people’s methods. Finally, I heard a sentence while watching the learning video: "The twisted module is lower-level, complex, and has not been fully transplanted to Python3.×"

Okay, anyway. My computer has python2.7, so I will use version 2.7

##Soswitched from python3.4 to python2.7 under the pycharm tool, and successfully installed twisted. Module!!

Problem: import error no module `twisted `

So I started to use the Python2.7 environment when I started to learn about the twisted framework. It prompted when running a small program (need to execute the command under cmd) import error no module `twisted`

#But I have installed the twisted module in Python2.7! And there is no error when running other programs to import twisted!! (A bit Suspicious life~)

So I wonder if it has something to do with operating under cmd? Python2.7 is definitely able to import twisted successfully, but before I imported Python3.4, it was not possible. Successful. So could it be that the cmd command I executed was running under Python3.4?

##Execute the python command and check the python version. Damn it!

I have switched to the python2.7 version in pycharm. The 3.4 version should not be displayed!! (A little suspicious of life again~)

## I checked the directory files shown in the two pictures below on my computer:

C:\python34 There is a python.exe and a python3.exe. (There are two .exes, which is very strange.

Remember that there was only one when installing python3.4 python3.exe, later I seemed to rename it and created an extra python.exe)

So when I executed the python command and checked the python version, C:\python34 was called python.exe in the directory instead of python.exe in the C:\python27 directory? ?

So I

delete

the python.exe

## in the C:\python34 directory

Execute the command again: python

Oh my god, my guess is right!!

Run a small program again (needs to be under cmd When executing the command), it can run without prompting import error no module `twisted`

Summary: Be careful when installing, please do not rename

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