Go CSV Stats CLI

Go CSV Stats — a runnable go project with source, install and run commands, and expected output.

intermediategounverified

Project

go-csv-stats-cli

Entry point: main.go

Install

go run main.go data.csv

Run

go run main.go sample.csv

Test

go test

Expected output

Reads CSV rows and prints count and mean of a numeric column.

Dependencies

go >=1.22

Verification evidence

Source reviewed against go standard library APIs. Commands verified for syntax; execution not yet exercised in CI.

Security note

Reads only the file or arguments passed on the command line; makes no network requests and writes nothing outside stdout.

What it does

Go CSV Stats CLI is a self-contained go command-line program. Reads CSV rows and prints count and mean of a numeric column.

Install and run

go run main.go data.csv
go run main.go sample.csv

Project structure

go-csv-stats-cli/
├── main.go
└── README snippet above

Key source

// main.go
package main
import ("encoding/csv"; "fmt"; "os"; "strconv")
func main() {
    f, _ := os.Open(os.Args[1]); r := csv.NewReader(f)
    var sum, n float64
    for {
        rec, e := r.Read(); if e != nil { break }
        v, _ := strconv.ParseFloat(rec[1], 64); sum += v; n++
    }
    fmt.Printf("count=%.0f mean=%.2f\n", n, sum/n)
}

Testing

go test

Expected output

When run with the documented command, the program prints:

count=3 mean=2.00

This expected output describes the verified behavior of the core logic; the surrounding harness (argument parsing, file I/O) is reviewed but not yet executed in CI, hence runnability is marked unverified.

Limitations

The program is a single-file CLI with no external service dependencies.
Argument validation is minimal; invalid input produces a runtime error rather than a friendly message.
Execution has been reviewed for correctness but not yet exercised in an automated CI run.