问题
I'd like to set the optimize flag (python -O myscript.py) at runtime within a python script based on a command line argument to the script like myscript.py --optimize or myscript --no-debug. I'd like to skip assert statements without iffing all of them away. Or is there a better way to efficiently ignore sections of python code. Are there python equivalents for #if and #ifdef in C++?
回答1:
-O is a compiler flag, you can't set it at runtime because the script already has been compiled by then.
Python has nothing comparable to compiler macros like #if.
Simply write a start_my_project.sh script that sets these flags.
回答2:
#!/usr/bin/env python
def main():
assert 0
print("tada")
if __name__=="__main__":
import os, sys
if '--optimize' in sys.argv:
sys.argv.remove('--optimize')
os.execl(sys.executable, sys.executable, '-O', *sys.argv)
else:
main()
来源：https://stackoverflow.com/questions/7527055/is-it-possible-to-set-the-python-o-optimize-flag-within-a-script