>> T = map(print, [1, 2, 3]) >>> type(T) ...">

# Why does map (print, x) return a list of values ​​"No"?

In Python 3.5, the code is

``````>>> T = map(print, [1, 2, 3])
>>> type(T)
<class 'map'>
```

```

returns a map object. I would expect this T map object to contain the numbers 1, 2, and 3; all on separate lines. This is actually happening. The only problem is that it also outputs a list of values `None`

the same length as the input list.

``````>>> list(T)
1
2
3
[None, None, None]
>>>
```

```

This repeats for any input I use, not just any integer list shown above. Can anyone explain why this is happening?

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Each `None`

one you see is a function that `print`

returns . To see what it does `map`

, try the following code:

``````>>> T = map(lambda x: x**2, [1, 2, 3])
>>> t = list(T)
>>> print(t)
[1, 4, 9]
```

```

If you use instead `print`

:

``````>>> T = map(print, [1, 2, 3])
>>> t = list(T)
1
2
3
>>> print(t)
[None, None, None]
```

```

This is not surprising because:

``````>>> a = print("anything")
anything
>>> print(a)
None
```

```
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