Do Elements not start from 0?
Question:
I’m a noob, learning via Datacamp (which is really annoying and nitpicky… I could’ve sworn elements started from 0, counting the first element in the list as 0???? This is the problem.
"Create downstairs again, as the first 6 elements of areas. This time, simplify the slicing by omitting the begin index.
Create upstairs again, as the last 4 elements of areas. This time, simplify the slicing by omitting the end index.
I answered with
# Create the areas list
areas = ["hallway", 11.25, "kitchen", 18.0, "living room", 20.0, "bedroom", 10.75, "bathroom", 9.50]
# Alternative slicing to create downstairs
downstairs = areas[:-4]
# Alternative slicing to create upstairs
upstairs = areas[5:]
*edited to include areas as I did answer with "areas"
Obviously this is wrong… but I could’ve sworn I just went through previous questions correctly….. starting with 0… as a rep of the first element… is this different when slicing? Thank you, if you have any resources for better study I would like to understand the syntax of this language better to become more intuitive with it.
Answers:
The Python slice function does start with 0 as the default starting index, however the end is EXCLUSIVE, meaning it does not include the element at the end of the slice.
slice([start], stop[, step])
list[:2] # Elements 0 and 1, stopping at 2, or the first two elements
list[2:] # Everything except the first two elements
This is what the instructions are saying.
The downstairs is the first 6 elements of the list areas. You can simplify the slicing by leaving the first index blank.
downstairs = areas[:7]
Upstairs is the last 4 elements of the list areas. You can simplify the slice by leaving the last index blank.
upstairs = areas[7:]
#or
upstairs = areas[-4:]
And to answer your question… Yes indexing starts at 0
I’m a noob, learning via Datacamp (which is really annoying and nitpicky… I could’ve sworn elements started from 0, counting the first element in the list as 0???? This is the problem.
"Create downstairs again, as the first 6 elements of areas. This time, simplify the slicing by omitting the begin index.
Create upstairs again, as the last 4 elements of areas. This time, simplify the slicing by omitting the end index.
I answered with
# Create the areas list
areas = ["hallway", 11.25, "kitchen", 18.0, "living room", 20.0, "bedroom", 10.75, "bathroom", 9.50]
# Alternative slicing to create downstairs
downstairs = areas[:-4]
# Alternative slicing to create upstairs
upstairs = areas[5:]
*edited to include areas as I did answer with "areas"
Obviously this is wrong… but I could’ve sworn I just went through previous questions correctly….. starting with 0… as a rep of the first element… is this different when slicing? Thank you, if you have any resources for better study I would like to understand the syntax of this language better to become more intuitive with it.
The Python slice function does start with 0 as the default starting index, however the end is EXCLUSIVE, meaning it does not include the element at the end of the slice.
slice([start], stop[, step])
list[:2] # Elements 0 and 1, stopping at 2, or the first two elements
list[2:] # Everything except the first two elements
This is what the instructions are saying.
The downstairs is the first 6 elements of the list areas. You can simplify the slicing by leaving the first index blank.
downstairs = areas[:7]
Upstairs is the last 4 elements of the list areas. You can simplify the slice by leaving the last index blank.
upstairs = areas[7:]
#or
upstairs = areas[-4:]
And to answer your question… Yes indexing starts at 0