“ Homebrew installs the stuff you need that Apple didn’t” - this is how Homebrew creators describe it, and we agree. In this tutorial, we describe how to safely install and uninstall Homebrew on Mac. Package managers like Homebrew make the command line interface even more powerful. It helps streamline a lot of work, especially for software developers. By using the command line, you can solve many tasks on Mac by running commands in Terminal. The macOS command line interface can be intimidating - but there’s lots of value inside. Phew! Again, I’m not an expert in this, but I have just spent a few hours fudging at it to get my Python environment working, and hopefully this’ll give you enough pointers to get there yourself too.Unlock the power of top dev apps on Setapp. That, plus the above pyenv setup seems to have got me back on the straight and narrow. Python configure opts is telling the compiler to build a version of Python that uses UCS2 (not UCS4), so that it works with pre-compiler binaries pip installs that are expecting this.įor SQLite specifically, I also needed to install SQLite through Homebrew, and the built-in OS X version doesn’t allow extension loading.LDFlags is then ensuring readline and the correct openssl actual libraries are available to the linker too.CFlags -I is ensuring that readline header files, the correct openssl header files, and the full XCode development environment libraries are available to the compiler.To explain a little of how I understand this to be working: Note the slashes at the end of each line: this is one single command. On the other hand though, for me, it now works nicely: C compilation flags are not my strong suit. It look quite a bit of googling to get a working answer, and I’ll happily admit this is somewhat cargo-culted from a whole series of StackOverflow answers and incomplete Github issues. Undefined symbols for architecture x86_64: “_sqlite3_enable_load_extension” Symbol not found: _PyUnicodeUCS2_DecodeUTF8 You’ll quickly start hitting more errors like: I ended up with a whole stream of errors trying to install Jupyter and it’s dependencies, particularly trying to get Sqlite extensions working happily. Undocumented though, is that this is not enough to give you a truly working Python install, especially if you want to install packages later on that require native compilation too. This sets options used by the Python compiler to build your new Python install, adding the XCode developer tools path first, so that the zlib libraries can be found. This is documented in the pyenv FAQ however, which recommends setting CFLAGS=“-I$(xcrun - show-sdk-path)/usr/include” when you’re installing. Easy! Just run pyenv install 2.7.11 (or any other version number).ĮRROR: The Python zlib extension was not compiled. Now, you want to download your python of choice with pyenv, and turn it on. You’ll also need readline, a standard GNU command-line management library that’s not included by default in OS X: brew install readline.
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