How do you use OR,AND in conditionals?

Question

I have found myself many times,with things that I need to be all or at least one equal to something,and I would write something like that: ``` if a==1 and b==1: do something ``` or ``` if a==1 or b==1: do something ``` If the number of things is small its ok,but it is still not elegant.So, is there a better way for a significant number of things, to do the above?Thanks.

Accepted Answer

Option 1: any / all

For the general case, have a look at `any` and `all`:

```
if all(x == 1 for x in a, b, c, d):

if any(x == 1 for x in a, b, c, d):
```

You can also use any iterable:

```
if any(x == 1 for x in states):
```

Option 2 - chaining and in

For your first example you can use boolean operator chaining:

```
if a == b == c == d == 1:
```

For your second example you can use `in`:

```
if 1 in states:
```

Option 3: any/all without a predicate

If you only care whether the value is truthy you can simplify further:

```
if any(flags):

if all(flags):
```

How do you use OR,AND in conditionals?

Solution

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