If you do dislike nesting with statements, for whatever reason, you can often avoid that with the contextlib.nested function. However, it won't make broken code (e.g., code that opens a file for append and then tries to read it instead) work, nor will lexically nesting with statements break code that's otherwise good.

Mar 31, 2017 · With more than one item, the context managers are processed as if multiple with statements were nested: with A() as a, B() as b: suite is equivalent to. with A() as a: with B() as b: suite Similar language appears in the Python 3 language reference. Update for 3.10+

Jul 28, 2017 · If Statement in Python (Nested Boolean statements) 0. ... Nested if statements or And. 0 'or' and 'and' in ...

Nov 19, 2019 · Without using another data structure, you could move the nested if-else statements into and conditions for the top level if-else statements. It would at least be more readable that way. Sadly, python does not have switch statements. –

Feb 8, 2019 · In Python 3.1+ you can specify multiple context expressions, and they will be processed as if multiple with statements were nested: with A() as a, B() as b: suite is equivalent to. with A() as a: with B() as b: suite

Jun 10, 2013 · A good and simple example for nested try/except could be the following: import numpy as np def divide(x, y): try: out = x/y except: try: out = np.inf * x / abs(x) except: out = np.nan finally: return out Now try various combinations and you will get the correct result:

Nov 15, 2016 · In Python you can write an else clause for a loop, which is executed when no break happens in the loop, or when the loop terminates naturally so to speak. Sometimes you can use it to break from multiple loops.

Oct 8, 2013 · I really doubt you'll notice any performance difference between the two, and this is a bit nicer than a nested try/excepts def something(a): for methodname in ['method1', 'method2', 'method3']: try: m = getattr(a, methodname) except AttributeError: pass …

Jan 27, 2016 · Indentation in python works almost like how curly braces in most other languages work. 4 spaces signals to the compiler that the block is indented, and so your code is actually nesting each conditional statement within one another, rather than doing what I think you intended, which was to have them assessed one after another.

Nov 21, 2019 · I am working on the python project in which I needed to implement nested switch. This answer helped me a lot. Here is working example based on that answer. The example is how I implemented it in my project. You can make changes to fit it with your needs.