FastAI
"""
ShowText([io; kwargs...]) <: ShowBackend
A backend for showing block data using text for REPL use.
Text is displayed to `io` and `kwargs` are keyword arguments
for `PrettyTables.pretty_table`, which is used to display
collections of blocks.
"""
struct
ShowText
<:
ShowBackend
io
::
Any
kwargs
::
Any
end
function
ShowText
(
io
=
stdout
;
hlines
=
:
all
,
alignment
=
:
l
,
kwargs
...
)
ShowText
(
io
,
(
;
hlines
=
hlines
,
alignment
=
alignment
,
kwargs
...
)
)
end
createhandle
(
backend
::
ShowText
)
=
backend
.
io
function
showblock!
(
io
,
backend
::
ShowText
,
(
title
,
block
)
::
Pair
,
obs
)
printstyled
(
io
,
title
,
bold
=
true
)
println
(
io
)
showblock!
(
io
,
backend
,
block
,
obs
)
end
function
showblock!
(
io
,
backend
::
ShowText
,
blocks
::
Tuple
,
obss
::
Tuple
)
header
=
[
block
isa
Pair
?
first
(
block
)
:
"
"
for
block
in
blocks
]
blocks
=
[
block
isa
Pair
?
last
(
block
)
:
block
for
block
in
blocks
]
data
=
reshape
(
[
PrettyTables
.
AnsiTextCell
(
io
->
showblock!
(
IOContext
(
io
,
:
color
=>
true
)
,
backend
,
block
,
obs
)
)
for
(
block
,
obs
)
in
zip
(
blocks
,
obss
)
]
,
1
,
:
)
pretty_table
(
io
,
data
;
header
=
header
,
noheader
=
all
(
isempty
,
header
)
,
backend
.
kwargs
...
)
end
function
showblocks!
(
io
,
backend
::
ShowText
,
blocks
::
Tuple
,
obsss
::
AbstractVector
)
header
=
[
block
isa
Pair
?
first
(
block
)
:
"
"
for
block
in
blocks
]
blocks
=
[
block
isa
Pair
?
last
(
block
)
:
block
for
block
in
blocks
]
rows
=
[
]
for
obss
in
obsss
row
=
reshape
(
[
AnsiTextCell
(
io
->
showblock!
(
IOContext
(
io
,
:
color
=>
true
)
,
backend
,
block
,
obs
)
)
for
(
block
,
obs
)
in
zip
(
blocks
,
obss
)
]
,
1
,
:
)
push!
(
rows
,
row
)
end
tabledata
=
reduce
(
vcat
,
rows
)
pretty_table
(
io
,
tabledata
;
header
=
header
,
noheader
=
all
(
isempty
,
header
)
,
backend
.
kwargs
...
)
end
function
showblocks!
(
io
,
backend
::
ShowText
,
block
,
obss
::
AbstractVector
)
showblocks!
(
io
,
backend
,
(
block
,
)
,
map
(
obs
->
(
obs
,
)
,
obss
)
)
endBlock implementations
function
showblock!
(
io
,
::
ShowText
,
block
::
Label
,
obs
)
print
(
io
,
obs
)
end
function
showblock!
(
io
,
::
ShowText
,
block
::
Continuous
,
obs
)
print
(
io
,
obs
)
end
function
showblock!
(
io
,
::
ShowText
,
block
::
LabelMulti
,
obs
)
print
(
io
,
obs
)
end
function
showblock!
(
io
,
::
ShowText
,
block
::
OneHotLabel
,
obs
)
if
!
(
sum
(
obs
)
≈
1
)
obs
=
softmax
(
obs
)
end
obs
=
round
.
(
obs
;
sigdigits
=
3
)
plot
=
UnicodePlots
.
barplot
(
block
.
classes
,
obs
,
width
=
20
,
compact
=
true
)
print
(
IOContext
(
io
,
:
color
=>
true
)
,
plot
)
end