Communities

Writing
Writing
Codidact Meta
Codidact Meta
The Great Outdoors
The Great Outdoors
Photography & Video
Photography & Video
Scientific Speculation
Scientific Speculation
Cooking
Cooking
Electrical Engineering
Electrical Engineering
Judaism
Judaism
Languages & Linguistics
Languages & Linguistics
Software Development
Software Development
Mathematics
Mathematics
Christianity
Christianity
Code Golf
Code Golf
Music
Music
Physics
Physics
Linux Systems
Linux Systems
Power Users
Power Users
Tabletop RPGs
Tabletop RPGs
Community Proposals
Community Proposals
tag:snake search within a tag
answers:0 unanswered questions
user:xxxx search by author id
score:0.5 posts with 0.5+ score
"snake oil" exact phrase
votes:4 posts with 4+ votes
created:<1w created < 1 week ago
post_type:xxxx type of post
Search help
Notifications
Mark all as read See all your notifications »
Q&A

Post History

60%
+1 −0
Q&A Tips for golfing in Python

Replace if/else expressions by array subscripts Consider the statement a=b if x<y else c You can get rid of the expensive keywords by using the implicit conversion of boolean values to inte...

posted 3y ago by celtschk‭

Answer
#1: Initial revision by user avatar celtschk‭ · 2021-09-16T05:32:50Z (over 3 years ago)
# Replace if/else expressions by array subscripts

Consider the statement
```
a=b if x<y else c
```
You can get rid of the expensive keywords by using the implicit conversion of boolean values to integer and array indexing:
```
a=[b,c][x<y]
```
Note however that here `b` and `c` are evaluated unconditionally, therefore this replacement doesn't work if b or c are expressions with side effects.