Say we have [code] L = [“a”, “b”, “zz”, “zzz”, “aa”] [/code] We want to sort by length first, then by alphabetical order. i.e. we want to obtain [‘a’, ‘b’, ‘aa’, ‘zz’, ‘zzz’] in the end. How to do that? The usual sorted() will give us this. [code] > sorted(L) [‘a’, ‘aa’, ‘b’, ‘zz’, ‘zzz’] [/code] Very much alphabetical, not what we want. Try sorted() with key=len will give us this. ...

Just put in 20 hours, no need to set aside 10,000 hours.

This article explains the python GIL pretty well. https://www.obytes.com/blog/2018/explaining-python-interpreter-lock/ In Python 2, a thread can at most perform 100 instructions/ticks before releasing the GIL. This setting can be changed with sys.setcheckinterval(). Then the OS will decide which thread will pick up the GIL next, possibly the same thread again based on the criteria the OS uses. The problem here is that the low-priority threads may keep waiting forever. In Python 3, a thread can at most run for 5ms before releasing the GIL. Then with some system-level signals the same thread won’t pick up the GIL again immediately after. Sounds more fair. However since an I/O call will lead to voluntarily releasing the GIL, a thread with many I/O calls will keep losing the GIL to other CPU bound threads each time by 5ms (at most, say there is a long-running thread). So worst case scenario a thread with 1000 I/O calls will have an overhead of 1000 * 5ms = 5 sec. That’s quite something since you can save that 5 sec by running a non-threaded version. Ironic it is. ...

My airflow version is v.1.10.1 and I am using python 3.5.2 I tried user._set_password but after looking at the users db table the password field is null… After looking at the source, the following works for me. [code] from flask_bcrypt import generate_password_hash user._password = generate_password_hash(‘your_password’, 12) [/code] Be sure to use SSL. Ref: https://airflow.apache.org/security.html https://stackoverflow.com/questions/48075826/airflow-authentication-setups-fails-with-attributeerror-cant-set-attribute/48946256

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Such a good idea. &start=16&end=171

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Don’t simply compare the ratios, coz they could have very different sample sizes.