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Update the notebook to use LFortran kernel · gaecom/lpython@f9b38dc · GitHub

/ lpython Public
forked from lcompilers/lpython

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certik
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Update the notebook to use LFortran kernel
1 parent 7666332 commit f9b38dc

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Lines changed: 32 additions & 75 deletions

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‎doc/nb/developer_tutorial.ipynb‎

Lines changed: 32 additions & 75 deletions
Original file line numberDiff line numberDiff line change
@@ -16,11 +16,11 @@
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"are encouraged to use them independently for other applications and build tools\n",
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"on top:\n",
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"\n",
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"* Abstract Syntax Tree (AST), module `lfortran.ast`: Represents any Fortran\n",
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"* Abstract Syntax Tree (AST): Represents any Fortran\n",
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" source code, strictly based on syntax, no semantic is included. The AST\n",
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" module can convert itself to Fortran source code.\n",
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"\n",
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"* Abstract Semantic Representation (ASR), module `lfortran.asr`: Represents a\n",
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"* Abstract Semantic Representation (ASR): Represents a\n",
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" valid Fortran source code, all semantic is included. Invalid Fortran code is\n",
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" not allowed (an error will be given). The ASR module can convert itself to an\n",
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" AST.\n",
@@ -37,38 +37,39 @@
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"metadata": {},
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"outputs": [],
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"source": [
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"from lfortran.ast import src_to_ast, print_tree\n",
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"from lfortran.ast.ast_to_src import ast_to_src\n",
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"src = \"\"\"\\\n",
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"integer function f(a, b) result(r)\n",
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"integer, intent(in) :: a, b\n",
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"r = a + b\n",
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"end function\n",
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"\"\"\"\n",
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"ast = src_to_ast(src, translation_unit=False)"
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"end function"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"We can pretty print it using `print_tree()` ([#59](https://gitlab.com/lfortran/lfortran/issues/59)):"
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"We can pretty print it using the `%%showast` magic:"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"metadata": {
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"scrolled": true
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},
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"outputs": [],
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"source": [
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"print_tree(ast)"
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"%%showast\n",
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"integer function f(a, b) result(r)\n",
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"integer, intent(in) :: a, b\n",
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"r = a + b\n",
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"end function"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"We can convert AST to Fortran source code using `ast_to_src()`:"
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"We can convert AST to Fortran source code using `%%showfmt`:"
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]
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},
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{
@@ -77,7 +78,11 @@
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"metadata": {},
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"outputs": [],
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"source": [
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"print(ast_to_src(ast))"
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"%%showfmt\n",
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"integer function f(a, b) result(r)\n",
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"integer, intent(in) :: a, b\n",
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"r = a + b\n",
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"end function"
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]
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},
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{
@@ -87,27 +92,14 @@
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"All AST nodes and their arguments are described in\n",
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"[AST.asdl](https://gitlab.com/lfortran/lfortran/blob/master/grammar/AST.asdl).\n",
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"\n",
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"## Abstract Semantic Representation (ASR)\n",
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"\n",
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"We can convert AST to ASR using the `ast_to_asr()` function:"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"from lfortran.semantic.ast_to_asr import ast_to_asr\n",
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"from lfortran.asr.pprint import pprint_asr\n",
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"asr = ast_to_asr(ast)"
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"## Abstract Semantic Representation (ASR)"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"We can pretty print using the `pprint_asr()` function:"
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"We can pretty print using the `%%showasr` magic:"
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]
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},
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{
@@ -116,40 +108,11 @@
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"metadata": {},
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"outputs": [],
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"source": [
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"pprint_asr(asr)"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"For example to get the variables defined in the function scope:"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"asr.global_scope.symbols[\"f\"].symtab.symbols.keys()"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"We can convert ASR to AST and to source code:"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"from lfortran.asr.asr_to_ast import asr_to_ast\n",
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"print(ast_to_src(asr_to_ast(asr)))"
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"%%showasr\n",
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"integer function f(a, b) result(r)\n",
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"integer, intent(in) :: a, b\n",
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"r = a + b\n",
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"end function"
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]
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},
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{
@@ -163,21 +126,15 @@
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],
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"metadata": {
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"kernelspec": {
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"display_name": "Python 3",
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"language": "python",
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"name": "python3"
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"display_name": "Fortran",
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"language": "fortran",
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"name": "fortran"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 3
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.7.3"
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"file_extension": ".f90",
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"mimetype": "text/x-fortran",
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"name": "fortran",
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"version": "2018"
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}
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},
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"nbformat": 4,

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