def generate_pylint_comments(in_path):
'''
Use Pylint to generate additional feedback comments for code,
e.g. if code follows PEP8 Style Convention
'''
pylint_stdout, _ = lint.py_run(
str(in_path) +
' --score=no --msg-template="{category}, {line}, {msg_id} {symbol}, {msg}"',
return_std=True)
status_mapping = {
'informational': CommentTypes.INFORMATIVE,
'refactor': CommentTypes.ACTIONABLE,
'convention': CommentTypes.ACTIONABLE,
'warning': CommentTypes.ESSENTIAL,
'error': CommentTypes.ESSENTIAL,
'fatal': CommentTypes.ESSENTIAL
}
cleaned_pylint_output = [
tuple(item.strip('" ').split(', '))
for item in pylint_stdout.getvalue().splitlines() if '**' not in item
]
pylint_comments = []
for line in cleaned_pylint_output:
if line[0]:
if line[2] == "C0301 line-too-long":
continue
if line[2] in ("C0114 missing-module-docstring",
"C0116 missing-function-docstring",
"C0304 missing-final-newline"):
pylint_comments.append(
Comment(type=status_mapping['informational'],
params={
'lineno': line[1],
'code': line[2],
'message': line[3:]
},
comment=f'python.pylint.{line[0]}'))
else:
pylint_comments.append(
Comment(type=status_mapping[line[0]],
params={
'lineno': line[1],
'code': line[2],
'message': line[3:]
},
comment=f'python.pylint.{line[0]}'))
return pylint_comments
def analyze(in_path: Path, out_path: Path):
"""Analyze the user's solution and give feedback.
Outputs a JSON that conforms to
https://github.com/exercism/docs/blob/main/building/tooling/analyzers/interface.md#output-format
"""
# List of Comment objects to process
comments = []
output_file = out_path.parent.joinpath("analysis.json")
# input file - if it can't be found, fail and bail
try:
user_solution = in_path.read_text()
except OSError as err:
# fail out fast with an ESSENTIAL (required) type comment for the student
comments.append(
Comment(type=CommentTypes.ESSENTIAL,
params={},
comment=Comments.MALFORMED_CODE))
finally:
if comments:
return Analysis.require(comments).dump(output_file)
# AST - if an AST can't be made, fail and bail
try:
tree = ast.parse(user_solution)
except Exception:
# If ast.parse fails, assume malformed code and fail with an ESSENTIAL (required) type comment for the student
comments.append(
Comment(type=CommentTypes.ESSENTIAL,
params={},
comment=Comments.MALFORMED_CODE))
finally:
if comments:
return Analysis.require(comments).dump(output_file)
# Generate PyLint comments for additional feedback.
comments.extend(
generate_pylint_comments(
in_path,
pylint_spec='/opt/analyzer/lib/ellens-alien-game/.pylintrc'))
return Analysis.summarize_comments(comments, output_file)
def analyze(in_path: Path, out_path: Path):
"""
Analyze the user's Two Fer solution to give feedback. Outputs a JSON that
conforms to https://github.com/exercism/docs/blob/main/building/tooling/analyzers/interface.md#output-format
"""
# List of Comment objects to process
comments = []
output_file = out_path.parent.joinpath("analysis.json")
# input file - if it can't be found, fail and bail
try:
user_solution = in_path.read_text()
except OSError as err:
# fail out fast with an ESSENTIAL (required) type comment for the student
comments.append(
Comment(type=CommentTypes.ESSENTIAL,
params={},
comment=Comments.MALFORMED_CODE))
finally:
if comments:
return Analysis.require(comments).dump(output_file)
# AST - if an AST can't be made, fail and bail
try:
tree = ast.parse(user_solution)
except Exception:
# If ast.parse fails, assume malformed code and fail with an ESSENTIAL (required) type comment for the student
comments.append(
Comment(type=CommentTypes.ESSENTIAL,
params={},
comment=Comments.MALFORMED_CODE))
finally:
if comments:
return Analysis.require(comments).dump(output_file)
# Does the solution have a method called two_fer?
has_method = False
# Does the solution correctly use a default argument?
uses_def_arg = False
# Does the solution have a return value?
has_return = False
# Does the solution use str.format?
uses_format = False
# Does the solution use f-strings?
uses_f_string = False
for node in ast.walk(tree):
# Check for method called two_fer
if isinstance(node, ast.FunctionDef):
has_method = node.name == "two_fer"
# Check for the use of string concatenation with + operator
elif isinstance(node,
ast.Add) and Comments.SIMPLE_CONCAT not in comments:
comments.append(
Comment(type=CommentTypes.ACTIONABLE,
params={},
comment=Comments.SIMPLE_CONCAT))
# Check for use of default arguments
elif isinstance(node, ast.arguments):
if node.defaults:
uses_def_arg = True
# Check if the default argument use is correct
try:
if (node.defaults[0].s != "you"
and Comments.WRONG_DEF_ARG not in comments):
comments.append(
Comment(type=CommentTypes.ESSENTIAL,
params={},
comment=Comments.WRONG_DEF_ARG))
except Exception:
if Comments.WRONG_DEF_ARG not in comments:
comments.append(
Comment(type=CommentTypes.ESSENTIAL,
params={},
comment=Comments.WRONG_DEF_ARG))
# Check for use of unnecessary conditionals
elif isinstance(node,
ast.If) and Comments.CONDITIONALS not in comments:
comments.append(
Comment(type=CommentTypes.ACTIONABLE,
params={},
comment=Comments.CONDITIONALS))
# Check for use of %-formatting
elif isinstance(
node, ast.Mod) and Comments.PERCENT_FORMATTING not in comments:
comments.append(
Comment(type=CommentTypes.ACTIONABLE,
params={},
comment=Comments.PERCENT_FORMATTING))
# Check for a return statement
elif isinstance(node, ast.Return):
has_return = True
# Search for use of str.format
elif isinstance(node, ast.Call):
try:
uses_format = node.func.attr == "format"
except Exception:
pass
# Search for use of f-strings
try:
if isinstance(node, ast.FormattedValue):
uses_f_string = True
except AttributeError:
pass # Fail if python version is too low
if not has_method:
comments.append(
Comment(type=CommentTypes.ESSENTIAL,
params={},
comment=Comments.NO_METHOD))
if not uses_def_arg:
comments.append(
Comment(type=CommentTypes.ESSENTIAL,
params={},
comment=Comments.NO_DEF_ARG))
if not has_return:
comments.append(
Comment(type=CommentTypes.ESSENTIAL,
params={},
comment=Comments.NO_RETURN))
# Generate PyLint comments for additional feedback.
comments.extend(generate_pylint_comments(in_path))
# Process all comments and write out feedback.
if uses_format or uses_f_string:
return Analysis.summarize_comments(comments, output_file, ideal=True)
else:
return Analysis.summarize_comments(comments, output_file)