无法在 python 3.6 上安装 Mist 或 pycrypto

Question

Whenever I try to run pip install mist , it shows me this error.

ERROR: Failed building wheel for pycrypto
Running setup.py clean for pycrypto Failed to build pycrypto Installing collected packages: pycrypto, ansible, mist Running setup.py install for pycrypto ... error ERROR: Command errored out with exit status 1: command: 'c:\\users\\utshab kumar ghosh\\appdata\\local\\programs\\python\\python36\\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\UTSHAB~1\\AppData\\Local\\Temp\\pip-install-c048vl5n\\pycrypto\\setup.py'"'"'; file ='"'"'C:\\Users\\UTSHAB~1\\AppData\\Local\\Temp\\pip-install-c048vl5n\\pycrypto\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)( file );code=f.read().replace('"'"'\\r\\n'"'"', '"'"'\\n'"'"');f.close();exec(compile(code, file , '"'"'exec'"'"'))' install --record 'C:\\Users\\UTSHAB~1\\AppData\\Local\\Temp\\pip-record-m3uevb6g\\install-record.txt' --single-version-externally-managed --compile cwd: C:\\Users\\UTSHAB~1\\AppData\\Local\\Temp\\pip-install-c048vl5n\\pycrypto\\

How can I solve this problem? I don't want to downgrade to Python 3.5.

Answer 1

TL;DR

Possible duplication of this and this .

Full Read

I know this is probably solved by @Utshab but I recently had the same issue albeit in a slightly different scenario.

My problem was on Mac OS Catalina (unclear as to what's the environment of the question giver) and with python 2.7 and not python 3.6 .

According to this answer you need to install xcode-select which are command line tools for Mac OS.

Some people might have Xcode installed via the App Store, and can install the command line tools through the App Store.

Users who don't have Xcode, or don't want to install it via the App Store can use the command xcode-select --install to install it.

It's possible for command lines tools to be installed but the tools themselves (eg gcc) will still not work. This sometime happens because though installed, the location of the installation is not recognized by the OS. To check things have been installed correctly you can try to run gcc --version and see if the install location is similar to /Library/Developer/CommandLineTools .

If you get an error about this gcc not being found you might need to point it to the right location so it will identify your command line tools installation:

1. Make sure /Library/Developer/CommandLineTools exists and has content in it.
2. Run xcode-select --switch /Library/Developer/CommandLineTools .

After I did these steps I was able to install pycrypto using pip install pycrypto

Hopes this helps.