1. Go’s Package Management Mechanisms 1.1 GOPATH GOPATH pulls code with the go get command and places it in the GOPATH directory. The problems with GOPATH are: It cannot manage package versions It uses a global repository, so it cannot isolate projects effectively 1.2 Vendor Starting with version 1.5, Go

1. Go’s Data Structures Basic types Boolean: bool Integer: byte, int, int8, int16, uint, uintptr Floating point: float32, float64 Complex: complex64, complex128 String: string Character: rune Error: error Composite types Pointer: pointer Array: array Slice: slice Dictionary: map Channel: chan Struct: struct Interface: interface A Go variable identifier is made up of letters, digits, and underscores, and its first character cannot be a digit.

1. Common Environment Variables 1.1 GOROOT $GOROOT is the local directory where the Go package is installed. 1 2 3 4 cd /c/Go ls AUTHORS CONTRIBUTORS PATENTS VERSION bin favicon.ico misc robots.txt test CONTRIBUTING.md LICENSE README.md api doc lib pkg src 1.2 GOPATH $GOPATH is the Go workspace directory, used to hold code, third-party libraries, compiled intermediate files, and so on.

Earlier we mentioned that Jupyter Notebook is an interactive notebook that supports running more than 40 programming languages and is very well suited to teaching. Recently, while learning the Go language, I thought of Jupyter. This article mainly describes how to install the Python3 and Go kernels inside Jupyter. 1.