# Swap key-value in dictionary
**URL:** https://forum.kx.com/t/swap-key-value-in-dictionary/12635
**Category:** Community Support
**Tags:** kdb-and-q
**Created:** [August 19, 2022, 3:11am UTC](https://forum.kx.com/t/swap-key-value-in-dictionary/12635 "2022-08-19T03:11:00Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@powerpeanuts1](https://forum.kx.com/u/powerpeanuts1)
#### Post date: [August 19, 2022, 3:11am UTC](https://forum.kx.com/t/swap-key-value-in-dictionary/12635/1 "2022-08-19T03:11:00Z")
hi, how can I swap key and list of values using q? Thanks!
python version: https://stackoverflow.com/questions/51740270/python-dictionary-swap-keyvalue-pair-when-values-exist-in-mutiple-keys
for example:
1 2 3!(4 5 3;6 7 3;4 1)
becomes
1 3 4 5 6 7!(enlist 3;1 2;1 3;enlist 1;enlist 2;enlist 2)
---
### Author:  [@cillianreilly1](https://forum.kx.com/u/cillianreilly1)
#### Post date: [August 19, 2022, 3:34am UTC](https://forum.kx.com/t/swap-key-value-in-dictionary/12635/2 "2022-08-19T03:34:00Z")
This achieves what you’re looking for.
q)d:1 2 3!(4 5 3;6 7 3;4 1) q)r:1 3 4 5 6 7!(enlist 3;1 2;1 3;enlist 1;enlist 2;enlist 2) q){a!keywhere each flip value(a:asc distinct raze x)in/:x} d 1| ,3 3| 1 2 4| 1 3 5| ,1 6| ,2 7| ,2 q)r~{a!keywhere each flip value(a:asc distinct raze x)in/:x}d 1b
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### Author:  [@cillianreilly1](https://forum.kx.com/u/cillianreilly1)
#### Post date: [August 19, 2022, 4:21am UTC](https://forum.kx.com/t/swap-key-value-in-dictionary/12635/3 "2022-08-19T04:21:00Z")
Another method:
q){a!x a:asc key x:group(!). flip raze key,''value x}d 1| ,3 3| 1 2 4| 1 3 5| ,1 6| ,2 7| ,2
---
### Author:  [@Rolf1](https://forum.kx.com/u/Rolf1)
#### Post date: [August 19, 2022, 2:28pm UTC](https://forum.kx.com/t/swap-key-value-in-dictionary/12635/4 "2022-08-19T14:28:00Z")
{key[i]!geti:iasc key x:group(!). flip raze key,''get x}
indexing into the keys instead of doing a lookup a smidge faster