There are many ways you can style multiple if conditions. You don't need to use 4 spaces on your second conditional line. So you can use something like &minusl;if (cond1 == 'val1' and cond2 == 'val2' and     cond3 == 'val3' and cond4 == 'val4'):# Actual codeYou can also start the conditions from the next line −if (    cond1 == 'val1' and cond2 == 'val2' and    cond3 == 'val3' and cond4 == 'val4' ):# Actual codeOr you can provide enough space between if and ( to accomodate the conditions in the same vertical column.if (cond1 == 'val1' ... Read More

Here are some of the steps that you can follow to optimize a nested if...elif...else.1. Ensure that the path that'll be taken most is near the top. This ensures that not multiple conditions are needed to be checked on the most executed path.2. Similarly, sort the paths by most use and put the conditions accordingly.3. Use short-circuiting to your advantage. If you have a statement like:if heavy operation() and light operation():Then consider changing it toif lightOperation() and heavy operation():This will ensure that heavy operation is not even executed if the light operation is false. Same can be done with or ... Read More

The ternary operator cannot be overloaded. Though you can wrap it up in a lambda/function and use it. For exampleresult = lambda x: 1 if x < 3 else 10 print(result(2)) print(result(1000))OutputThis will give the output −1 10

For expressions like − a == b first the python interpreter looks up the __eq__() method on the object a. If it finds that, then executes that with b as argument, ie, a.__eq__(b). If this method returns a NotImplemented, then it tries doind just the reverse, ie, it tries to call, b.__eq__(a)

The python operator performs very badly in a list, O(n), because it traverses the whole list. You can use something like a set or a dict(hashed data structures that have very fast lookups) to get the same result in ~O(1) time!But this also depends on the type of data structure you're looking at. This is because while lookups in sets/dicts are fast, insertion may take more time than list. So this speedup really depends on the type.

If you want to convert a statement like −if :    to a single line, You can use the single line if syntax to do so −if : Another way to do this is leveraging the short-circuiting and operator like − and If is false, then short-circuiting will kick in and the right-hand side won't be evaluated. If is true, then the right-hand side will be evaluated and will be evaluated.

Reversed set operators are operators that are defined as:s & z corresponds to s.__and__(z) z & s corresponds to s.__rand__(z)These don't make much sense in normal operations like and, add, or, etc of simple objects. However in case of inheritence, reversed operations are particularly useful when dealing with subclasses because if the right operand is a subclass of the left operand the reversed operation is attempted first. You may have different implementations in parent and child classes.These reversed operations are also used if the first operand returns NotImplemented.

If you want to get an inversion of only first 16 bits of a number, you can take a xor of that number with 65535(16 1s in binary). examplea = 3 # 11 in binary b = a ^ 65535 print(bin(b))OutputThis will give the output −0b1111111111111100

If you want to get an inversion of only first 16 bits of a number, you can take a xor of that number with 65535(16 1s in binary). Forgetting a 2s complement, just add one to the result. For example,Examplea = 3 # 11 in binary b = (a ^ 65535) + 1 print(bin(b))OutputThis will give the output:0b1111111111111101

No this cannot be done. It's part of the Python language itself. That's how the language parses the expressions and builds parse and syntax trees. From the documentation:When performing mathematical operations with mixed operators, it is important to note that Python determines which operations to perform first, based on a pre-determined precedence. This precedence follows a similar precedence to most programming languages.