Shamoon Asked: 2020-01-20 04:51:35 +0800 CST 如何有条件地从 POSIX shell 脚本传递参数? 21 #!/bin/sh echo "Noise $1" echo "Enhancement $2" for snr in 0 5 10 15 20 25 do python evaluate.py --noise $1 --snr 25 --iterations 1250 --enhancement $2 done 如果$2未指定,我不想将--enhancement $2参数传递给我的 python 脚本。我该怎么做? shell-script posix