issue_comments

The previous code for highlighting errors in syntax (which was already a bit confused thanks to the added return, see https://github.com/simonw/sqlite-utils/issues/355#issuecomment-991393684 - isn't compatible with this approach at all. I'm going to ditch it and just show a generic Error: Could not compile code message.

This seems to work: ```python def _compile_code(code, imports, variable="value"): locals = {} globals = {"r": recipes, "recipes": recipes} # If user defined a convert() function, return that try: exec(code, globals, locals) return locals["convert"] except (AttributeError, SyntaxError, NameError, KeyError, TypeError): pass

# Try compiling their code as a function instead
body_variants = [code]
# If single line and no 'return', try adding the return
if "\n" not in code and not code.strip().startswith("return "):
    body_variants.insert(0, "return {}".format(code))

for variant in body_variants:
    new_code = ["def fn({}):".format(variable)]
    for line in variant.split("\n"):
        new_code.append("    {}".format(line))
    try:
        code_o = compile("\n".join(new_code), "<string>", "exec")
        break
    except SyntaxError:
        # Try another variant, e.g. for 'return row["column"] = 1'
        continue

for import_ in imports:
    globals[import_.split(".")[0]] = __import__(import_)
exec(code_o, globals, locals)
return locals["fn"]

```

Here's the code in question: https://github.com/simonw/sqlite-utils/blob/b8c134059e89f0fa040b84fb7d0bda25b9a52759/sqlite_utils/utils.py#L288-L299

Tried this test:

python result = CliRunner().invoke( cli.cli, [ "insert", db_path, "rows", "-", "--convert", 'row["is_chicken"] = True', ], input='{"name": "Azi"}', ) And got this error:

E + where 1 = <Result SyntaxError('invalid syntax', ('<string>', 2, 30, ' return row["is_chicken"] = True\n'))>.exit_code

The code snippet compilation isn't currently compatible with this.

Also need to update relevant docs for that example.

Might be a case of modifying this line: https://github.com/simonw/sqlite-utils/blob/e0c476bc380744680c8b7675c24fb0e9f5ec6dcd/sqlite_utils/cli.py#L828

To: python docs = (fn(doc) or doc for doc in docs)