常看到python中出現sys.argv[]這東西
找了些資料總算理解了
紀錄一下備忘
sys.argv[]是python獲取命令列參數的方法
譬如我們在terminal中會輸入的指令
ls -a
-a就是命令列參數
sys.argv[0] 代表了文件的檔案名稱本身
意思就是ls
sys.argv[1] 就代表了-a
以下是參考網路的範例並修改成容易理解的方式
# -*- coding: utf-8 -*-
import sys>
>#建立一個讀取檔案的function能將檔案內容print出來
def readfile(filename):
'''read file and print'''
f = file(filename)
while True:
line = f.readline()
if len(line) == 0:
break
print line,
f.close()
#開始對sys.argv下定義
if len(sys.argv) < 2: #len小於2也就是不帶參數啦
print 'no argument'
sys.exit()
if sys.argv[1].startswith('--'):
option = sys.argv[1][2:] # 取出sys.argv[1]的數值但是忽略掉'--'這兩個字元
if option == 'version':
print 'Version 1.2.3'
elif option == 'help':
print 'help documention'
else:
print 'only --version --help can be used'
sys.exit()
else:
for filename in sys.argv[1:]: #檔案名稱於參數位置時讀取檔案
readfile(filename)
"""
此檔案名稱為readfile.py
則可以用readfile.py --version來查詢版號
readfile.py --help來查詢help文件
readfile.py readme.txt 可以執行function
"""
thx
回覆刪除thank you
回覆刪除thanks!
回覆刪除Thanks.
回覆刪除https://www.royaltykitten.com/sphynx-kittens-for-sale
回覆刪除https://www.royaltykitten.com/sphynx-kittens-available/
https://www.royaltykitten.com/sphynx-for-sale/
https://www.royaltykitten.com/black-sphynx-kitten/
https://www.royaltykitten.com/sphynx-kitten-near-me
How are Sphynx cats with other pets?
回覆刪除This is hard to answer. Generally, as a breed and given how affectionate they are I would say you have a better chance of a Sphynx cat getting along with other pets than a different breed of cat. But then each one is different and may or may not like any given pet or person. https://www.royaltykitten.com/
sphynx cats for sale
They definitely do not like to be alone, that was one of the reasons we got two. So it is always good for them to have a buddy if you are going to be away at work all day.
https://www.chihuahuapuppiesforsale1.com/
Sphynx kittens for sale, sphynx kittens for sale $500
شركة تنظيف بالقطيف
回覆刪除tül perde modelleri
回覆刪除sms onay
Mobil Odeme Bozdurma
NFT NASIL ALINIR
ankara evden eve nakliyat
trafik sigortasi
dedektör
Kurma Website
AŞK KİTAPLARI