Create an ASCII Christmas Tree with Shell and Python Scripts

Hello, dear friends! As the beautiful scenery of Jiangnan arrives and blossoms fall, the annual Christmas season is approaching.

We ask: why shouldn't operations engineers celebrate Christmas? Today we’ll draw a Christmas tree with code.

Shell Script Version

<code>#!/bin/bash
declare -a a=('.' '~' "'" 'O' "'" '~' '.' '*')
[[ $# = 0 ]] && s=9 || s=$1
[[ $s -gt 5 ]] || s=5
for (( w=1, r=7, n=1; n<=$s; n++ )) ; do
  for (( i=$s-n; i>0; i-- )) ; do
    echo -n " "
  done
  for (( i=1; i<=w; i++ )) ; do
    echo -n "${a[r]}"
    [[ $r -gt 5 ]] && r=0 || r=$r+1
  done
  w=$w+2
  echo " "
 done; echo " "
</code>

Python Code Version

<code>import sys
w = sys.stdout.write
def t(n,s):
    for i in range(n):
        for a in range(n-i):
            w(" ")
        w("[")
        for l in range(i<<1):
            if i==n-1:
                w("_")
            else:
                w("~")
        w("]")
        print("")
    for o in range(s):
        for i in range(n):
            w(" ")
        print("[]")


t(10, 2)
</code>

The script prints a stylized Christmas tree directly in the terminal.

Upcoming GOPS Global Operations Conference

The GOPS Global Operations Conference, co‑hosted by GreatOPS and BizDevOps, will be held in Shenzhen on April 25‑26, 2025. It is the first large‑scale operations conference in China, gathering thousands of professionals to share advanced technologies and best practices.

Wishing all operations engineers a happy holiday!