Explicitly evaluate both conditions when using Boolean AND
java, python
Solution
You'd just execute the conditions first, before testing with `and`:
# explicitly execute the conditions first, compare the outcomes later
test1, test2 = x == 2, myList.pop() == 3
if test1 and test2:
For your case that can be simplified down to just the `myList.pop()` call:
# explicitly pop a value from myList, regardless of what x == 2 returns
myList_value = myList.pop()
if x == 2 and myList_value == 3:
Of course, you could also just have swapped the tests:
if myList.pop() == 3 and x == 2:
to ensure that the `list.pop()` method is always executed.
Otherwise, the `&` bitwise operator is overloaded for Python booleans just like it is in Java:
>>> from itertools import product
>>> for a, b in product([False, True], repeat=2):
... print('{a!r:5} and {b!r:5}: {o1!r:5} {a!r:5} & {b!r:5}: {o2!r:5}'.format(a=a, b=b, o1=a and b, o2=a & b))
...
False and False: False False & False: False
False and True : False False & True : False
True and False: False True & False: False
True and True : True True & True : True
And as such you can use it to avoid short-circuiting, but only if both operands are booleans:
>>> def foo():
... print 'called!'
... return False
...
>>> def bar():
... print 'also called!'
... return False
...
>>> foo() and bar()
called!
False
>>> foo() & bar()
called!
also called!
False
However, I'd consider making use of this unpythonic, and indicative of bad coding style. Restructure your code to not have to rely on this in the first place.
Problem
I'm not that familiar with Python. From Java I know that in conditionals, if we want have both the operands of `&&` evaluated, we use `&` instead. For example: ``` if ( x == 2 & y++ == 3) // do this ``` But I'm working in python 2.7 and I want to perform operation like: ``` if x == 2 and myList.pop() == 3: # do this ``` But both operands of `and` must execute. In Python, the first comparison would be performed and if it was false, the 2nd comparison would be skipped. But I want both of them to execute even if first comparison returned False. Is there any solution for this in Python?