search
Search
Unlock 100+ guides
search toc
close
Cancel
Post
account_circle
Profile
exit_to_app
Sign out
What does this mean?
Why is this true?
Give me some examples!
search
keyboard_voice
close
Searching Tips
Search for a recipe:
"Creating a table in MySQL"
Search for an API documentation: "@append"
Search for code: "!dataframe"
Apply a tag filter: "#python"
Useful Shortcuts
/ to open search panel
Esc to close search panel
to navigate between search results
d to clear all current filters
Enter to expand content preview
Doc Search
Code Search Beta
SORRY NOTHING FOUND!
mic
Start speaking...
Voice search is only supported in Safari and Chrome.
Shrink
Navigate to
PySpark
147 guides
keyboard_arrow_down
check_circle
Mark as learned
thumb_up
1
thumb_down
0
chat_bubble_outline
0
Comment
auto_stories Bi-column layout
settings

# PySpark RDD | keys method

schedule Aug 12, 2023
Last updated
local_offer
PySpark
Tags
expand_more
mode_heat
Master the mathematics behind data science with 100+ top-tier guides
Start your free 7-days trial now!

PySpark RDD's `keys(~)` method returns the keys of a pair RDD that contains tuples of length two.

# Parameters

This method does not take in any parameters.

# Return Value

A PySpark RDD (`pyspark.rdd.PipelinedRDD`).

# Examples

Consider the following PySpark pair RDD:

``` # Create a RDD using the parallelize methodrdd = sc.parallelize([("a",3),("a",2),("b",5),("c",1)]) rdd.collect() [('a', 3), ('a', 2), ('b', 5), ('c', 1)] ```

## Getting the keys of a pair RDD in PySpark

To get the keys of the pair RDD as a list of strings:

``` rdd.keys().collect() ['a', 'a', 'b', 'c'] ```

Note that if the RDD is not a pair RDD, then the values are returned:

``` rdd = sc.parallelize(["a","a","b","c"]) rdd.collect() ['a', 'a', 'b', 'c'] ```
Edited by 0 others
thumb_up
thumb_down
Comment
Citation
Ask a question or leave a feedback...
thumb_up
1
thumb_down
0
chat_bubble_outline
0
settings
Enjoy our search
Hit / to insta-search docs and recipes!