# ModuleNotFoundError: No module named 'pynq.iop' in PYNQ Z2

**URL:** <https://discuss.pynq.io/t/modulenotfounderror-no-module-named-pynq-iop-in-pynq-z2/1000>\
**Category:** Support\
**Created:** [March 11, 2020, 6:14am UTC](https://discuss.pynq.io/t/modulenotfounderror-no-module-named-pynq-iop-in-pynq-z2/1000 "2020-03-11T06:14:44Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![vineetnair1981](https://avatars.discourse-cdn.com/v4/letter/v/e0b2c6/32.png) [@vineetnair1981](https://discuss.pynq.io/u/vineetnair1981)\
**Post date:** [March 11, 2020, 6:14am UTC](https://discuss.pynq.io/t/modulenotfounderror-no-module-named-pynq-iop-in-pynq-z2/1000/1 "2020-03-11T06:14:44Z")

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Getting error:  
ModuleNotFoundError: No module named ‘pynq.iop’

Full code:  
from pynq import Overlay  
from pynq.iop import Pmod\_OLED  
from pynq.iop.iop\_const import PMODB

ol = Overlay(“base.bit”)  
ol.download()

pmod\_oled = Pmod\_OLED(PMODB)  
pmod\_oled.clear()  
pmod\_oled.write(‘Welcome to the\nPynq-Z1 board!’)

* * *

ModuleNotFoundError Traceback (most recent call last)  
 in ()  
1 from pynq import Overlay  
----\> 2 from pynq.iop import Pmod\_OLED  
3 from pynq.iop.iop\_const import PMODB  
4  
5 ol = Overlay(“base.bit”)

ModuleNotFoundError: No module named ‘pynq.iop’

---

<div class="post-metadata">

**Author:** ![cathalmccabe](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.pynq.io/cathalmccabe/32/3348_2.png) [@cathalmccabe](https://discuss.pynq.io/u/cathalmccabe)\
**Post date:** [March 11, 2020, 11:49am UTC](https://discuss.pynq.io/t/modulenotfounderror-no-module-named-pynq-iop-in-pynq-z2/1000/2 "2020-03-11T11:49:15Z")

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Which board/image are you using, and what code/example are you trying to follow?

It looks like you are using something that is out of date.

In latest PYNQ version, pynq.iop module was replaced and functionality is in pynq.lib now.

For v2.5 PYNQ image, you can find an example of using Pmod OLED here:

> <https://github.com/Xilinx/PYNQ/blob/master/boards/Pynq-Z1/base/notebooks/pmod/pmod_oled.ipynb>

Cathal