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import copy
import itertools
from functools import partial
from typing import Any, Iterable, List, Optional, Set, Tuple, Type
from isort.format import format_simplified
from . import parse, sorting, wrap
from .comments import add_to_line as with_comments
from .identify import STATEMENT_DECLARATIONS
from .settings import DEFAULT_CONFIG, Config
def sorted_imports(
parsed: parse.ParsedContent,
config: Config = DEFAULT_CONFIG,
extension: str = "py",
import_type: str = "import",
) -> str:
"""Adds the imports back to the file.
(at the index of the first import) sorted alphabetically and split between groups
"""
if parsed.import_index == -1:
return _output_as_string(parsed.lines_without_imports, parsed.line_separator)
formatted_output: List[str] = parsed.lines_without_imports.copy()
remove_imports = [format_simplified(removal) for removal in config.remove_imports]
sections: Iterable[str] = itertools.chain(parsed.sections, config.forced_separate)
if config.no_sections:
parsed.imports["no_sections"] = {"straight": {}, "from": {}}
base_sections: Tuple[str, ...] = ()
for section in sections:
if section == "FUTURE":
base_sections = ("FUTURE",)
continue
parsed.imports["no_sections"]["straight"].update(
parsed.imports[section].get("straight", {})
)
parsed.imports["no_sections"]["from"].update(parsed.imports[section].get("from", {}))
sections = base_sections + ("no_sections",)
output: List[str] = []
seen_headings: Set[str] = set()
pending_lines_before = False
for section in sections:
straight_modules = parsed.imports[section]["straight"]
if not config.only_sections:
straight_modules = sorting.sort(
config,
straight_modules,
key=lambda key: sorting.module_key(
key, config, section_name=section, straight_import=True
),
reverse=config.reverse_sort,
)
from_modules = parsed.imports[section]["from"]
if not config.only_sections:
from_modules = sorting.sort(
config,
from_modules,
key=lambda key: sorting.module_key(key, config, section_name=section),
reverse=config.reverse_sort,
)
if config.star_first:
star_modules = []
other_modules = []
for module in from_modules:
if "*" in parsed.imports[section]["from"][module]:
star_modules.append(module)
else:
other_modules.append(module)
from_modules = star_modules + other_modules
straight_imports = _with_straight_imports(
parsed, config, straight_modules, section, remove_imports, import_type
)
from_imports = _with_from_imports(
parsed, config, from_modules, section, remove_imports, import_type
)
lines_between = [""] * (
config.lines_between_types if from_modules and straight_modules else 0
)
if config.from_first:
section_output = from_imports + lines_between + straight_imports
else:
section_output = straight_imports + lines_between + from_imports
if config.force_sort_within_sections:
# collapse comments
comments_above = []
new_section_output: List[str] = []
for line in section_output:
if not line:
continue
if line.startswith("#"):
comments_above.append(line)
elif comments_above:
new_section_output.append(_LineWithComments(line, comments_above))
comments_above = []
else:
new_section_output.append(line)
# only_sections options is not imposed if force_sort_within_sections is True
new_section_output = sorting.sort(
config,
new_section_output,
key=partial(sorting.section_key, config=config),
reverse=config.reverse_sort,
)
# uncollapse comments
section_output = []
for line in new_section_output:
comments = getattr(line, "comments", ())
if comments:
section_output.extend(comments)
section_output.append(str(line))
section_name = section
no_lines_before = section_name in config.no_lines_before
if section_output:
if section_name in parsed.place_imports:
parsed.place_imports[section_name] = section_output
continue
section_title = config.import_headings.get(section_name.lower(), "")
if section_title and section_title not in seen_headings:
if config.dedup_headings:
seen_headings.add(section_title)
section_comment = f"# {section_title}"
if section_comment not in parsed.lines_without_imports[0:1]: # pragma: no branch
section_output.insert(0, section_comment)
section_footer = config.import_footers.get(section_name.lower(), "")
if section_footer and section_footer not in seen_headings:
if config.dedup_headings:
seen_headings.add(section_footer)
section_comment_end = f"# {section_footer}"
if (
section_comment_end not in parsed.lines_without_imports[-1:]
): # pragma: no branch
section_output.append("") # Empty line for black compatibility
section_output.append(section_comment_end)
if pending_lines_before or not no_lines_before:
output += [""] * config.lines_between_sections
output += section_output
pending_lines_before = False
else:
pending_lines_before = pending_lines_before or not no_lines_before
if config.ensure_newline_before_comments:
output = _ensure_newline_before_comment(output)
while output and output[-1].strip() == "":
output.pop() # pragma: no cover
while output and output[0].strip() == "":
output.pop(0)
if config.formatting_function:
output = config.formatting_function(
parsed.line_separator.join(output), extension, config
).splitlines()
output_at = 0
if parsed.import_index < parsed.original_line_count:
output_at = parsed.import_index
formatted_output[output_at:0] = output
if output:
imports_tail = output_at + len(output)
while [
character.strip() for character in formatted_output[imports_tail : imports_tail + 1]
] == [""]:
formatted_output.pop(imports_tail)
if len(formatted_output) > imports_tail:
next_construct = ""
tail = formatted_output[imports_tail:]
for index, line in enumerate(tail): # pragma: no branch
should_skip, in_quote, *_ = parse.skip_line(
line,
in_quote="",
index=len(formatted_output),
section_comments=config.section_comments,
needs_import=False,
)
if not should_skip and line.strip():
if (
line.strip().startswith("#")
and len(tail) > (index + 1)
and tail[index + 1].strip()
):
continue
next_construct = line
break
if in_quote: # pragma: no branch
next_construct = line
break
if config.lines_after_imports != -1:
lines_after_imports = config.lines_after_imports
if config.profile == "black" and extension == "pyi": # special case for black
lines_after_imports = 1
formatted_output[imports_tail:0] = ["" for line in range(lines_after_imports)]
elif extension != "pyi" and next_construct.startswith(STATEMENT_DECLARATIONS):
formatted_output[imports_tail:0] = ["", ""]
else:
formatted_output[imports_tail:0] = [""]
if config.lines_before_imports != -1:
lines_before_imports = config.lines_before_imports
if config.profile == "black" and extension == "pyi": # special case for black
lines_before_imports = 1
formatted_output[:0] = ["" for line in range(lines_before_imports)]
if parsed.place_imports:
new_out_lines = []
for index, line in enumerate(formatted_output):
new_out_lines.append(line)
if line in parsed.import_placements:
new_out_lines.extend(parsed.place_imports[parsed.import_placements[line]])
if (
len(formatted_output) <= (index + 1)
or formatted_output[index + 1].strip() != ""
):
new_out_lines.append("")
formatted_output = new_out_lines
return _output_as_string(formatted_output, parsed.line_separator)
def _with_from_imports(
parsed: parse.ParsedContent,
config: Config,
from_modules: Iterable[str],
section: str,
remove_imports: List[str],
import_type: str,
) -> List[str]:
output: List[str] = []
for module in from_modules:
if module in remove_imports:
continue
import_start = f"from {module} {import_type} "
from_imports = list(parsed.imports[section]["from"][module])
if (
not config.no_inline_sort
or (config.force_single_line and module not in config.single_line_exclusions)
) and not config.only_sections:
from_imports = sorting.sort(
config,
from_imports,
key=lambda key: sorting.module_key(
key,
config,
True,
config.force_alphabetical_sort_within_sections,
section_name=section,
),
reverse=config.reverse_sort,
)
if remove_imports:
from_imports = [
line for line in from_imports if f"{module}.{line}" not in remove_imports
]
sub_modules = [f"{module}.{from_import}" for from_import in from_imports]
as_imports = {
from_import: [
f"{from_import} as {as_module}" for as_module in parsed.as_map["from"][sub_module]
]
for from_import, sub_module in zip(from_imports, sub_modules)
if sub_module in parsed.as_map["from"]
}
if config.combine_as_imports and not ("*" in from_imports and config.combine_star):
if not config.no_inline_sort:
for as_import in as_imports:
if not config.only_sections:
as_imports[as_import] = sorting.sort(config, as_imports[as_import])
for from_import in copy.copy(from_imports):
if from_import in as_imports:
idx = from_imports.index(from_import)
if parsed.imports[section]["from"][module][from_import]:
from_imports[(idx + 1) : (idx + 1)] = as_imports.pop(from_import)
else:
from_imports[idx : (idx + 1)] = as_imports.pop(from_import)
only_show_as_imports = False
comments = parsed.categorized_comments["from"].pop(module, ())
above_comments = parsed.categorized_comments["above"]["from"].pop(module, None)
while from_imports:
if above_comments:
output.extend(above_comments)
above_comments = None
if "*" in from_imports and config.combine_star:
import_statement = wrap.line(
with_comments(
_with_star_comments(parsed, module, list(comments or ())),
f"{import_start}*",
removed=config.ignore_comments,
comment_prefix=config.comment_prefix,
),
parsed.line_separator,
config,
)
from_imports = [
from_import for from_import in from_imports if from_import in as_imports
]
only_show_as_imports = True
elif config.force_single_line and module not in config.single_line_exclusions:
import_statement = ""
while from_imports:
from_import = from_imports.pop(0)
single_import_line = with_comments(
comments,
import_start + from_import,
removed=config.ignore_comments,
comment_prefix=config.comment_prefix,
)
comment = (
parsed.categorized_comments["nested"].get(module, {}).pop(from_import, None)
)
if comment:
single_import_line += (
f"{comments and ';' or config.comment_prefix} " f"{comment}"
)
if from_import in as_imports:
if (
parsed.imports[section]["from"][module][from_import]
and not only_show_as_imports
):
output.append(
wrap.line(single_import_line, parsed.line_separator, config)
)
from_comments = parsed.categorized_comments["straight"].get(
f"{module}.{from_import}"
)
if not config.only_sections:
output.extend(
with_comments(
from_comments,
wrap.line(
import_start + as_import, parsed.line_separator, config
),
removed=config.ignore_comments,
comment_prefix=config.comment_prefix,
)
for as_import in sorting.sort(config, as_imports[from_import])
)
else:
output.extend(
with_comments(
from_comments,
wrap.line(
import_start + as_import, parsed.line_separator, config
),
removed=config.ignore_comments,
comment_prefix=config.comment_prefix,
)
for as_import in as_imports[from_import]
)
else:
output.append(wrap.line(single_import_line, parsed.line_separator, config))
comments = None
else:
while from_imports and from_imports[0] in as_imports:
from_import = from_imports.pop(0)
if not config.only_sections:
as_imports[from_import] = sorting.sort(config, as_imports[from_import])
from_comments = (
parsed.categorized_comments["straight"].get(f"{module}.{from_import}") or []
)
if (
parsed.imports[section]["from"][module][from_import]
and not only_show_as_imports
):
specific_comment = (
parsed.categorized_comments["nested"]
.get(module, {})
.pop(from_import, None)
)
if specific_comment:
from_comments.append(specific_comment)
output.append(
wrap.line(
with_comments(
from_comments,
import_start + from_import,
removed=config.ignore_comments,
comment_prefix=config.comment_prefix,
),
parsed.line_separator,
config,
)
)
from_comments = []
for as_import in as_imports[from_import]:
specific_comment = (
parsed.categorized_comments["nested"]
.get(module, {})
.pop(as_import, None)
)
if specific_comment:
from_comments.append(specific_comment)
output.append(
wrap.line(
with_comments(
from_comments,
import_start + as_import,
removed=config.ignore_comments,
comment_prefix=config.comment_prefix,
),
parsed.line_separator,
config,
)
)
from_comments = []
if "*" in from_imports:
output.append(
with_comments(
_with_star_comments(parsed, module, []),
f"{import_start}*",
removed=config.ignore_comments,
comment_prefix=config.comment_prefix,
)
)
from_imports.remove("*")
for from_import in copy.copy(from_imports):
comment = (
parsed.categorized_comments["nested"].get(module, {}).pop(from_import, None)
)
if comment:
from_imports.remove(from_import)
if from_imports:
use_comments = []
else:
use_comments = comments
comments = None
single_import_line = with_comments(
use_comments,
import_start + from_import,
removed=config.ignore_comments,
comment_prefix=config.comment_prefix,
)
single_import_line += (
f"{use_comments and ';' or config.comment_prefix} " f"{comment}"
)
output.append(wrap.line(single_import_line, parsed.line_separator, config))
from_import_section = []
while from_imports and (
from_imports[0] not in as_imports
or (
config.combine_as_imports
and parsed.imports[section]["from"][module][from_import]
)
):
from_import_section.append(from_imports.pop(0))
if config.combine_as_imports:
comments = (comments or []) + list(
parsed.categorized_comments["from"].pop(f"{module}.__combined_as__", ())
)
import_statement = with_comments(
comments,
import_start + (", ").join(from_import_section),
removed=config.ignore_comments,
comment_prefix=config.comment_prefix,
)
if not from_import_section:
import_statement = ""
do_multiline_reformat = False
force_grid_wrap = config.force_grid_wrap
if force_grid_wrap and len(from_import_section) >= force_grid_wrap:
do_multiline_reformat = True
if len(import_statement) > config.line_length and len(from_import_section) > 1:
do_multiline_reformat = True
# If line too long AND have imports AND we are
# NOT using GRID or VERTICAL wrap modes
if (
len(import_statement) > config.line_length
and len(from_import_section) > 0
and config.multi_line_output
not in (wrap.Modes.GRID, wrap.Modes.VERTICAL) # type: ignore
):
do_multiline_reformat = True
if config.split_on_trailing_comma and module in parsed.trailing_commas:
import_statement = wrap.import_statement(
import_start=import_start,
from_imports=from_import_section,
comments=comments,
line_separator=parsed.line_separator,
config=config,
explode=True,
)
elif do_multiline_reformat:
import_statement = wrap.import_statement(
import_start=import_start,
from_imports=from_import_section,
comments=comments,
line_separator=parsed.line_separator,
config=config,
)
if config.multi_line_output == wrap.Modes.GRID: # type: ignore
other_import_statement = wrap.import_statement(
import_start=import_start,
from_imports=from_import_section,
comments=comments,
line_separator=parsed.line_separator,
config=config,
multi_line_output=wrap.Modes.VERTICAL_GRID, # type: ignore
)
if (
max(
len(import_line)
for import_line in import_statement.split(parsed.line_separator)
)
> config.line_length
):
import_statement = other_import_statement
elif len(import_statement) > config.line_length:
import_statement = wrap.line(import_statement, parsed.line_separator, config)
if import_statement:
output.append(import_statement)
return output
def _with_straight_imports(
parsed: parse.ParsedContent,
config: Config,
straight_modules: Iterable[str],
section: str,
remove_imports: List[str],
import_type: str,
) -> List[str]:
output: List[str] = []
as_imports = any((module in parsed.as_map["straight"] for module in straight_modules))
# combine_straight_imports only works for bare imports, 'as' imports not included
if config.combine_straight_imports and not as_imports:
if not straight_modules:
return []
above_comments: List[str] = []
inline_comments: List[str] = []
for module in straight_modules:
if module in parsed.categorized_comments["above"]["straight"]:
above_comments.extend(parsed.categorized_comments["above"]["straight"].pop(module))
if module in parsed.categorized_comments["straight"]:
inline_comments.extend(parsed.categorized_comments["straight"][module])
combined_straight_imports = ", ".join(straight_modules)
if inline_comments:
combined_inline_comments = " ".join(inline_comments)
else:
combined_inline_comments = ""
output.extend(above_comments)
if combined_inline_comments:
output.append(
f"{import_type} {combined_straight_imports} # {combined_inline_comments}"
)
else:
output.append(f"{import_type} {combined_straight_imports}")
return output
for module in straight_modules:
if module in remove_imports:
continue
import_definition = []
if module in parsed.as_map["straight"]:
if parsed.imports[section]["straight"][module]:
import_definition.append((f"{import_type} {module}", module))
import_definition.extend(
(f"{import_type} {module} as {as_import}", f"{module} as {as_import}")
for as_import in parsed.as_map["straight"][module]
)
else:
import_definition.append((f"{import_type} {module}", module))
comments_above = parsed.categorized_comments["above"]["straight"].pop(module, None)
if comments_above:
output.extend(comments_above)
output.extend(
with_comments(
parsed.categorized_comments["straight"].get(imodule),
idef,
removed=config.ignore_comments,
comment_prefix=config.comment_prefix,
)
for idef, imodule in import_definition
)
return output
def _output_as_string(lines: List[str], line_separator: str) -> str:
return line_separator.join(_normalize_empty_lines(lines))
def _normalize_empty_lines(lines: List[str]) -> List[str]:
while lines and lines[-1].strip() == "":
lines.pop(-1)
lines.append("")
return lines
class _LineWithComments(str):
comments: List[str]
def __new__(
cls: Type["_LineWithComments"], value: Any, comments: List[str]
) -> "_LineWithComments":
instance = super().__new__(cls, value)
instance.comments = comments
return instance
def _ensure_newline_before_comment(output: List[str]) -> List[str]:
new_output: List[str] = []
def is_comment(line: Optional[str]) -> bool:
return line.startswith("#") if line else False
for line, prev_line in zip(output, [None] + output): # type: ignore
if is_comment(line) and prev_line != "" and not is_comment(prev_line):
new_output.append("")
new_output.append(line)
return new_output
def _with_star_comments(parsed: parse.ParsedContent, module: str, comments: List[str]) -> List[str]:
star_comment = parsed.categorized_comments["nested"].get(module, {}).pop("*", None)
if star_comment:
return comments + [star_comment]
return comments