Python sys.argv
Test1
sys.argv-test.py文件，加入代码如下：
import sys
def print_sys_argv():
print(sys.argv[0])
shell运行如下：
python3 sys.argv-test.py
Output:
D:\Python\Python3DocumentOfficial>python3 sys.args-test.py
sys.args-test.py
Test2
sys.argv-test.py文件，加入代码如下：
import sys
def print_sys_argv():
print(sys.argv[0])
print(sys.argv[1])
shell运行如下：
python3 sys.argv-test.py 123
Output:
D:\Python\Python3DocumentOfficial>python3 sys.args-test.py
sys.args-test.py
123
Test3
sys.argv-test.py文件，加入代码如下：
import sys
def print_sys_argv():
print(sys.argv[2:])
shell运行如下：
python3 sys.argv-test.py a b c d e f g
Output:
D:\Python\Python3DocumentOfficial>python3 sys.args-test.py a b c d e f g
['b', 'c', 'd', 'e', 'f', 'g']
sys.argv[0]是脚本名称，sys.argv[1:]是后面跟如的参数列表。
Test4
import sys
def print_args():
if len(sys.argv) < 2:
sys.exit()
else:
op = sys.argv[1][2:]
if op == 'help':
print('Are you asking for help?')
elif op == 'print':
print('Do you want print something?')
elif op == 'play':
print('Do you want to play with somebody?')
else:
print('There is no such option '+ op)
if __name__ == '__main__':
print_args()
Output:
D:\Python\Python3DocumentOfficial>python3 sys.args-test.py --help
Are you asking for help?
D:\Python\Python3DocumentOfficial>python3 sys.args-test.py --print
Do you want print something?
D:\Python\Python3DocumentOfficial>python3 sys.args-test.py --play
Do you want to play with somebody?
D:\Python\Python3DocumentOfficial>python3 sys.args-test.py --love
There is no such option love
