python-3.x

问题 I am working on a django/wagtail management command (let's call it "file_upload") that does roughly the following: take "csv" argument, which is a full path to a CSV file. parse and open the result using csv for each row, create and save a custom Wagtail Image model object (inheriting from AbstractImage , with a few extra CharField that I do not think prevent me from doing what I want to do) The (currently simplified) CSV looks like this: 1.jpg,Title 1 2.jpg,Title 2 Does not complicated at

问题 Why does os.system('command') from my python interpreter not have the same output as command from the terminal? Question explained quickly : I have echo $CONFPATH /home/claramart/Datamart/Parameter but os.system('echo $CONFPATH') 0 Why is that? Details : I want to get my environment $CONFPATH. I'm using python3.5 and ubuntu16.04.2. I can do this from command line : echo $CONFPATH /home/claramart/Datamart/Parameter This is the answer I want. Executing it as a python command from command line

问题 Why does os.system('command') from my python interpreter not have the same output as command from the terminal? Question explained quickly : I have echo $CONFPATH /home/claramart/Datamart/Parameter but os.system('echo $CONFPATH') 0 Why is that? Details : I want to get my environment $CONFPATH. I'm using python3.5 and ubuntu16.04.2. I can do this from command line : echo $CONFPATH /home/claramart/Datamart/Parameter This is the answer I want. Executing it as a python command from command line

问题 Why does os.system('command') from my python interpreter not have the same output as command from the terminal? Question explained quickly : I have echo $CONFPATH /home/claramart/Datamart/Parameter but os.system('echo $CONFPATH') 0 Why is that? Details : I want to get my environment $CONFPATH. I'm using python3.5 and ubuntu16.04.2. I can do this from command line : echo $CONFPATH /home/claramart/Datamart/Parameter This is the answer I want. Executing it as a python command from command line

问题 I have a 2D list of booleans. I want to select a random index from the the list where the value is False . For example, given the following list: [[True, False, False], [True, True, True], [False, True, True]] The valid choices would be: [0, 1] , [0, 2] , and [2, 0] . I could keep a list of valid indices and then use random.choice to select from it, but it seems unpythonic to keep a variable and update it every time the underlying list changes for only this one purpose. Bonus points if your

问题 I have a 2D list of booleans. I want to select a random index from the the list where the value is False . For example, given the following list: [[True, False, False], [True, True, True], [False, True, True]] The valid choices would be: [0, 1] , [0, 2] , and [2, 0] . I could keep a list of valid indices and then use random.choice to select from it, but it seems unpythonic to keep a variable and update it every time the underlying list changes for only this one purpose. Bonus points if your

问题 Hi I'm having one Django web app where My model A contains 1000 records and I want to set a daily update limit for example if users are updating that data by uploading a .xls file then it should count how many records updated and once it is more than 500 then the user should get an Error message(Is there Any easy way to implement this at file processing level). Can Anyone help me how to implement this (Is there an SQLite parameter that I can mention in settings.py) below is my upload code.

问题 Hi I'm having one Django web app where My model A contains 1000 records and I want to set a daily update limit for example if users are updating that data by uploading a .xls file then it should count how many records updated and once it is more than 500 then the user should get an Error message(Is there Any easy way to implement this at file processing level). Can Anyone help me how to implement this (Is there an SQLite parameter that I can mention in settings.py) below is my upload code.

问题 I am trying to set the default python in my docker container to be python3 and have set the aliases in the dockerfile. When I open the .bashrc file, they show up. As far as I can tell, it should work but the default python version is still 2.7. if I run which python, it will still point to usr/bin/python rather than python3. Same with pip. Can anyone tell me what the problem is? Here is the command I'm using to alias: RUN \ echo 'alias python="/usr/bin/python3"' >> /root/.bashrc && \ echo

问题 I am trying to set the default python in my docker container to be python3 and have set the aliases in the dockerfile. When I open the .bashrc file, they show up. As far as I can tell, it should work but the default python version is still 2.7. if I run which python, it will still point to usr/bin/python rather than python3. Same with pip. Can anyone tell me what the problem is? Here is the command I'm using to alias: RUN \ echo 'alias python="/usr/bin/python3"' >> /root/.bashrc && \ echo