Links: PYTHON - PROGRAMMING
Rel: python standard library
Ref:
Tags: #public

---

import sys

---

sys .argv
a list of arguments with the name of called module at index 0
``` # example.py {: id="example.py" }
if len(sys.argv) > 1:
print(sys.argv[1])

$
$
$python3 example.py 'This is a thing'
This is a thing

--- 

color error output?

sys.stderr.write('This is stderr text\n') #should be red?
sys.stderr.flush()
sys.stdout.write('This is stdout text\n')

sys.exec_info [ docs ](https://docs.python.org/3/library/sys.html#sys.exc_info)
"executing an except clause"
(type, value, traceback)

def error_handling():
return ' {}. {}, line: {}'.format(
sys.exc_info()[0],
sys.exc_info()[1],
sys.exc_info()[2].tb_lineno)

try:
a+b
except Exception as e:
logging.error(error_handling())
print(sys.exc_info()) # tuple {: id="tuple" }

...

ERROR:root: . name 'a' is not defined, line: 2

(, NameError("name 'a' is not defined"), )
```

---

python