yes. here are things you can use the -B
command line option:
python -B
or use the PYTHONDONTWRITEBYTECODE
environment option:
export PYTHONDONTWRITEBYTECODE=1
these make sure the .pyc
files are not generated in the first place.
Вопрос
I have written a rather large module which is automatically compiled into a .pyc file when I import it.
When I want to test features of the module in the interpreter, e.g., class methods, I use the reload()
function from the imp
package.
The problem is that it reloads the .pyc
file, not the .py
file.
For example I try a function in the interpreter, figure out that it is not working properly, I would make changes to the .py
file. However, if I reload the module in the interpreter, it reloads the .pyc
file so that the changes are not reflected in the interpreter. I would have to quit the interpreter, start it again and use import
to load the module (and create the .pyc
file from the .py
file). Or alternatively I would have to delete the .pyc
file each time.
Is there any better way? E.g., to make reload()
prefer .py
files over .pyc
files?
Here is an except from the interpreter session that shows that reload()
loads the .pyc
file.
>>> reload(pdb)
<module 'pdb' from 'pdb.pyc'>
EDIT:
And even if I delete the .pyc
file, another .pyc
file will be created each time I use reload, so that I have to delete the .pyc
file each time I use reload.
>>> reload(pdb)
<module 'pdb' from 'pdb.py'>
>>> reload(pdb)
<module 'pdb' from 'pdb.pyc'>
Решение
yes. here are things you can use the -B
command line option:
python -B
or use the PYTHONDONTWRITEBYTECODE
environment option:
export PYTHONDONTWRITEBYTECODE=1
these make sure the .pyc
files are not generated in the first place.
Другие советы
if you're using ipython, you can can do a shell command by prefixing it with !
So you could do
>>> !rm some_file.pyc
>>> reload(some_file)
Alternatively, you could define a quick function in your current shell:
>>> import os
>>> def reload(module_name):
... os.system('rm ' + module_name + '.pyc')
... reload(module_name)
...
and just call it whenever you want to reload your module.
You don't need to remove obsoleted *.pyc, because reload(module) does this automatically.
For this purpose I usually use something like:
import module
def reinit():
try:
reload(module)
except:
import traceback
traceback.print_exc()
call_later(1, reinit)
reinit()