用Python编写级联if语句的方法

Question

Is there a more Pythonic way to write the following function?

def foo():
    flag = False
    if condition1:
        if condition2:
            flag = True
    return flag

Answer 1

Here you go:

def foo():
    return bool(condition1 and condition2)

Answer 2

You could simplify it like below:

def foo:
   return condition1 and condition2

Note that the variable flag is not being used anywhere, and so it is perfectly fine to remove it in this case.

Answer 3

If you are looking for the function to return exactly one of True or False then you can simplify like this:

def foo():
    return bool(condition1 and condition2)

This replicates exactly your code.

Answer 4

Or even easier:

def foo(): 
    return condition1 and condition2

Answer 5

You could simplify it like this:

def foo:
    if condition1 and condition2:
        return True
    else:
        return False