# -*- coding: utf-8 -*-
# Copyright 2022, SERTIT-ICube - France, https://sertit.unistra.fr/
# This file is part of sertit-utils project
# https://github.com/sertit/sertit-utils
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
""" Tools for paths and files """
import errno
import hashlib
import json
import logging
import os
import pprint
import re
import shutil
import tarfile
import tempfile
import zipfile
from datetime import date, datetime
from enum import Enum
from json import JSONDecoder, JSONEncoder
from pathlib import Path
from typing import Any, Union
import dill
import numpy as np
from cloudpathlib import AnyPath, CloudPath
from lxml import etree, html
from tqdm import tqdm
from sertit import misc
from sertit.logs import SU_NAME
LOGGER = logging.getLogger(SU_NAME)
[docs]def get_root_path() -> Union[CloudPath, Path]:
"""
Get the root path of the current disk:
- On Linux this returns :code:`/`
- On Windows this returns :code:`C:/` or whatever the current drive is
.. code-block:: python
>>> get_root_path()
"/" on Linux
"C:/" on Windows (if you run this code from the C: drive)
"""
return AnyPath(os.path.abspath(os.sep))
[docs]def listdir_abspath(directory: Union[str, CloudPath, Path]) -> list:
"""
Get absolute path of all files in the given directory.
It is the same function than :code:`os.listdir` but returning absolute paths.
.. code-block:: python
>>> folder = "."
>>> listdir_abspath(folder)
['D:/_SERTIT_UTILS/sertit-utils/sertit/files.py',
'D:/_SERTIT_UTILS/sertit-utils/sertit/logs.py',
'D:/_SERTIT_UTILS/sertit-utils/sertit/misc.py',
'D:/_SERTIT_UTILS/sertit-utils/sertit/network.py',
'D:/_SERTIT_UTILS/sertit-utils/sertit/rasters_rio.py',
'D:/_SERTIT_UTILS/sertit-utils/sertit/strings.py',
'D:/_SERTIT_UTILS/sertit-utils/sertit/vectors.py',
'D:/_SERTIT_UTILS/sertit-utils/sertit/version.py',
'D:/_SERTIT_UTILS/sertit-utils/sertit/__init__.py']
Args:
directory (Union[str, CloudPath, Path]): Relative or absolute path to the directory to be scanned
Returns:
str: Absolute path of all files in the given directory
"""
dirpath = AnyPath(directory)
return list(dirpath.iterdir())
[docs]def to_abspath(
path: Union[str, CloudPath, Path], create: bool = True
) -> Union[CloudPath, Path]:
"""
Return the absolute path of the specified path and check if it exists
If not:
- If it is a file (aka has an extension), it raises an exception
- If it is a folder, it creates it
To be used with argparse to retrieve the absolute path of a file, like:
.. code-block:: python
>>> parser = argparse.ArgumentParser()
>>> # Add config file path key
>>> parser.add_argument("--config",
help="Config file path (absolute or relative)",
type=to_abspath)
Args:
path (Union[str, CloudPath, Path]): Path as a string (relative or absolute)
create (bool): Create directory if not existing
Returns:
Union[CloudPath, Path]: Absolute path
"""
abs_path = AnyPath(path).resolve()
if not abs_path.exists():
if abs_path.suffix:
# If the path specifies a file (with extension), it raises an exception
raise FileNotFoundError(f"Non existing file: {abs_path}")
# If the path specifies a folder, it creates it
if create:
abs_path.mkdir()
return abs_path
[docs]def real_rel_path(
path: Union[str, CloudPath, Path], start: Union[str, CloudPath, Path]
) -> Union[CloudPath, Path]:
"""
Gives the real relative path from a starting folder.
(and not just adding :code:`../..` between the start and the target)
.. code-block:: python
>>> path = r'D:/_SERTIT_UTILS/sertit-utils/sertit'
>>> start = os.path.join(".", "..", "..")
>>> real_rel_path(path, start)
'sertit-utils/sertit'
Args:
path (Union[str, CloudPath, Path]): Path to make relative
start (Union[str, CloudPath, Path]): Start, the path being relative from this folder.
Returns:
Relative path
"""
path = AnyPath(path)
start = AnyPath(start)
if not isinstance(path, CloudPath) and not isinstance(start, CloudPath):
rel_path = AnyPath(os.path.relpath(path.parent, start), path.name)
else:
rel_path = path
return rel_path
[docs]def get_archived_file_list(archive_path: Union[str, CloudPath, Path]) -> list:
"""
Get the list of all the files contained in an archive.
.. code-block:: python
>>> arch_path = 'D:/path/to/zip.zip'
>>> get_archived_file_list(arch_path, file_regex)
['file_1.txt', 'file_2.tif', 'file_3.xml', 'file_4.geojson']
Args:
archive_path (Union[str, CloudPath, Path]): Archive path
Returns:
list: All files contained in the given archive
"""
archive_path = AnyPath(archive_path)
if archive_path.suffix == ".zip":
with zipfile.ZipFile(archive_path) as zip_ds:
file_list = [f.filename for f in zip_ds.filelist]
else:
try:
with tarfile.open(archive_path) as tar_ds:
tar_mb = tar_ds.getmembers()
file_list = [mb.name for mb in tar_mb]
except tarfile.ReadError as ex:
raise TypeError(f"Impossible to open archive: {archive_path}") from ex
return file_list
[docs]def get_archived_path(
archive_path: Union[str, CloudPath, Path], file_regex: str, as_list: bool = False
) -> Union[list, CloudPath, Path]:
"""
Get archived file path from inside the archive.
.. WARNING::
If :code:`as_list` is :code:`False`, it will only return the first file matched !
You can use this `site <https://regexr.com/>`_ to build your regex.
.. code-block:: python
>>> arch_path = 'D:/path/to/zip.zip'
>>> file_regex = '.*dir.*file_name' # Use .* for any character
>>> path = get_archived_path(arch_path, file_regex)
'dir/filename.tif'
Args:
archive_path (Union[str, CloudPath, Path]): Archive path
file_regex (str): File regex (used by re) as it can be found in the getmembers() list
as_list (bool): If true, returns a list (including all found files). If false, returns only the first match
Returns:
Union[list, str]: Path from inside the zipfile
"""
# Get file list
archive_path = AnyPath(archive_path)
file_list = get_archived_file_list(archive_path)
# Search for file
regex = re.compile(file_regex)
archived_band_paths = list(filter(regex.match, file_list))
if not archived_band_paths:
raise FileNotFoundError(
f"Impossible to find file {file_regex} in {get_filename(archive_path)}"
)
# Convert to str if needed
if not as_list:
archived_band_paths = archived_band_paths[0]
return archived_band_paths
[docs]def get_archived_rio_path(
archive_path: Union[str, CloudPath, Path], file_regex: str, as_list: bool = False
) -> Union[list, CloudPath, Path]:
"""
Get archived file path from inside the archive, to be read with rasterio:
- :code:`zip+file://{zip_path}!{file_name}`
- :code:`tar+file://{tar_path}!{file_name}`
See `here <https://rasterio.readthedocs.io/en/latest/topics/datasets.html?highlight=zip#dataset-identifiers>`_
for more information.
.. WARNING::
It wont be readable by pandas, geopandas or xmltree !
.. WARNING::
If :code:`as_list` is :code:`False`, it will only return the first file matched !
You can use this `site <https://regexr.com/>`_ to build your regex.
.. code-block:: python
>>> arch_path = 'D:/path/to/zip.zip'
>>> file_regex = '.*dir.*file_name' # Use .* for any character
>>> path = get_archived_tif_path(arch_path, file_regex)
'zip+file://D:/path/to/output.zip!dir/filename.tif'
>>> rasterio.open(path)
<open DatasetReader name='zip+file://D:/path/to/output.zip!dir/filename.tif' mode='r'>
Args:
archive_path (Union[str, CloudPath, Path]): Archive path
file_regex (str): File regex (used by re) as it can be found in the getmembers() list
as_list (bool): If true, returns a list (including all found files). If false, returns only the first match
Returns:
Union[list, str]: Band path that can be read by rasterio
"""
if archive_path.suffix in [".tar", ".zip"]:
prefix = archive_path.suffix[-3:]
elif archive_path.suffix == ".tar.gz":
raise TypeError(
".tar.gz files are too slow to be read from inside the archive. Please extract them instead."
)
else:
raise TypeError("Only .zip and .tar files can be read from inside its archive.")
# Search for file
archived_band_paths = get_archived_path(archive_path, file_regex, as_list=True)
# Convert to rio path
if isinstance(archive_path, CloudPath):
archived_band_paths = [
f"{prefix}+file+{archive_path}!{path}" for path in archived_band_paths
]
else:
archived_band_paths = [
f"{prefix}+file://{archive_path}!{path}" for path in archived_band_paths
]
# Convert to str if needed
if not as_list:
archived_band_paths = archived_band_paths[0]
return archived_band_paths
[docs]def read_archived_file(archive_path: Union[str, CloudPath, Path], regex: str) -> bytes:
"""
Read archived file (in bytes) from :code:`zip` or :code:`tar` archives.
You can use this `site <https://regexr.com/>`_ to build your regex.
Args:
archive_path (Union[str, CloudPath, Path]): Archive path
regex (str): Regex (used by re) as it can be found in the getmembers() list
Returns:
bytes: Archived file in bytes
"""
archive_path = AnyPath(archive_path)
# Compile regex
regex = re.compile(regex)
# Open tar and zip XML
try:
if archive_path.suffix == ".tar":
with tarfile.open(archive_path) as tar_ds:
tar_mb = tar_ds.getmembers()
name_list = [mb.name for mb in tar_mb]
band_name = list(filter(regex.match, name_list))[0]
tarinfo = [mb for mb in tar_mb if mb.name == band_name][0]
file_str = tar_ds.extractfile(tarinfo).read()
elif archive_path.suffix == ".zip":
with zipfile.ZipFile(archive_path) as zip_ds:
name_list = [f.filename for f in zip_ds.filelist]
band_name = list(filter(regex.match, name_list))[0]
file_str = zip_ds.read(band_name)
elif archive_path.suffix == ".tar.gz":
raise TypeError(
".tar.gz files are too slow to read from inside the archive. Please extract them instead."
)
else:
raise TypeError(
"Only .zip and .tar files can be read from inside its archive."
)
except IndexError:
raise FileNotFoundError(
f"Impossible to find file {regex} in {get_filename(archive_path)}"
)
return file_str
[docs]def read_archived_xml(
archive_path: Union[str, CloudPath, Path], xml_regex: str
) -> etree._Element:
"""
Read archived XML from :code:`zip` or :code:`tar` archives.
You can use this `site <https://regexr.com/>`_ to build your regex.
.. code-block:: python
>>> arch_path = 'D:/path/to/zip.zip'
>>> file_regex = '.*dir.*file_name' # Use .* for any character
>>> read_archived_xml(arch_path, file_regex)
<Element LANDSAT_METADATA_FILE at 0x1c90007f8c8>
Args:
archive_path (Union[str, CloudPath, Path]): Archive path
xml_regex (str): XML regex (used by re) as it can be found in the getmembers() list
Returns:
etree._Element: XML file
"""
xml_bytes = read_archived_file(archive_path, xml_regex)
return etree.fromstring(xml_bytes)
[docs]def read_archived_html(
archive_path: Union[str, CloudPath, Path], regex: str
) -> html.HtmlElement:
"""
Read archived HTML from :code:`zip` or :code:`tar` archives.
You can use this `site <https://regexr.com/>`_ to build your regex.
.. code-block:: python
>>> arch_path = 'D:/path/to/zip.zip'
>>> file_regex = '.*dir.*file_name' # Use .* for any character
>>> read_archived_html(arch_path, file_regex)
<Element html at 0x1c90007f8c8>
Args:
archive_path (Union[str, CloudPath, Path]): Archive path
regex (str): HTML regex (used by re) as it can be found in the getmembers() list
Returns:
html._Element: HTML file
"""
html_bytes = read_archived_file(archive_path, regex)
return html.fromstring(html_bytes)
[docs]def archive(
folder_path: Union[str, CloudPath, Path],
archive_path: Union[str, CloudPath, Path],
fmt: str = "zip",
) -> Union[CloudPath, Path]:
"""
Archives a folder recursively.
.. code-block:: python
>>> folder_path = 'D:/path/to/folder_to_archive'
>>> archive_path = 'D:/path/to/output'
>>> archive = archive(folder_path, archive_path, fmt="gztar")
'D:/path/to/output/folder_to_archive.tar.gz'
Args:
folder_path (Union[str, CloudPath, Path]): Folder to archive
archive_path (Union[str, CloudPath, Path]): Archive path, with or without extension
fmt (str): Format of the archive, used by :code:`shutil.make_archive`. Choose between [zip, tar, gztar, bztar, xztar]
Returns:
str: Archive filename
"""
archive_path = AnyPath(archive_path)
folder_path = AnyPath(folder_path)
# Shutil make_archive needs a path without extension
archive_base = os.path.splitext(archive_path)[0]
# Archive the folder
archive_fn = shutil.make_archive(
archive_base,
format=fmt,
root_dir=folder_path.parent,
base_dir=folder_path.name,
)
return AnyPath(archive_fn)
[docs]def add_to_zip(
zip_path: Union[str, CloudPath, Path],
dirs_to_add: Union[list, str, CloudPath, Path],
) -> Union[CloudPath, Path]:
"""
Add folders to an already existing zip file (recursively).
.. code-block:: python
>>> zip_path = 'D:/path/to/zip.zip'
>>> dirs_to_add = ['D:/path/to/dir1', 'D:/path/to/dir2']
>>> add_to_zip(zip_path, dirs_to_add)
>>> # zip.zip contains 2 more folders, dir1 and dir2
Args:
zip_path (Union[str, CloudPath, Path]): Already existing zip file
dirs_to_add (Union[list, str, CloudPath, Path]): Directories to add
Returns:
Union[CloudPath, Path]: Updated zip_path
"""
zip_path = AnyPath(zip_path)
# If the zip is on the cloud, cache it (zipfile doesnt like cloud paths)
if isinstance(zip_path, CloudPath):
zip_path = AnyPath(zip_path.fspath)
# Check if existing zipfile
if not zip_path.is_file():
raise FileNotFoundError(f"Non existing {zip_path}")
# Convert to list if needed
if not isinstance(dirs_to_add, list):
dirs_to_add = [dirs_to_add]
# Add all folders to the existing zip
# Forced to use ZipFile because make_archive only works with one folder and not existing zipfile
with zipfile.ZipFile(zip_path, "a") as zip_file:
progress_bar = tqdm(dirs_to_add)
for dir_to_add_path in progress_bar:
# Just to be sure, use str instead of Paths
if isinstance(dir_to_add_path, Path):
dir_to_add = str(dir_to_add_path)
elif isinstance(dir_to_add_path, CloudPath):
dir_to_add = dir_to_add_path.fspath
else:
dir_to_add = dir_to_add_path
progress_bar.set_description(
f"Adding {os.path.basename(dir_to_add)} to {os.path.basename(zip_path)}"
)
tmp = tempfile.TemporaryDirectory()
if os.path.isfile(dir_to_add):
dir_to_add = extract_file(dir_to_add, tmp.name)
for root, _, files in os.walk(dir_to_add):
base_path = os.path.join(dir_to_add, "..")
# Write dir (in namelist at least)
zip_file.write(root, os.path.relpath(root, base_path))
# Write files
for file in files:
zip_file.write(
os.path.join(root, file),
os.path.relpath(
os.path.join(root, file), os.path.join(dir_to_add, "..")
),
)
# Clean tmp
tmp.cleanup()
return zip_path
[docs]def get_filename(file_path: Union[str, CloudPath, Path]) -> str:
"""
Get file name (without extension) from file path, ie:
.. code-block:: python
>>> file_path = 'D:/path/to/filename.zip'
>>> get_file_name(file_path)
'filename'
Args:
file_path (Union[str, CloudPath, Path]): Absolute or relative file path (the file doesn't need to exist)
Returns:
str: File name (without extension)
"""
file_path = AnyPath(file_path)
# We need to avoid splitext because of nested extensions such as .tar.gz
return file_path.name.split(".")[0]
[docs]def get_ext(file_path: Union[str, CloudPath, Path]) -> str:
"""
Get file extension from file path, ie:
WITHOUT THE FIRST POINT
.. code-block:: python
>>> file_path = 'D:/path/to/filename.zip'
>>> get_file_name(file_path)
'zip'
Args:
file_path (Union[str, CloudPath, Path]): Absolute or relative file path (the file doesn't need to exist)
Returns:
str: File name (without extension)
"""
file_path = AnyPath(file_path)
# We need to avoid splitext because of nested extensions such as .tar.gz
return ".".join(file_path.name.split(".")[1:])
[docs]def remove(path: Union[str, CloudPath, Path]) -> None:
"""
Deletes a file or a directory (recursively) using :code:`shutil.rmtree` or :code:`os.remove`.
.. code-block:: python
>>> path_to_remove = 'D:/path/to/remove' # Could also be a file
>>> remove(path_to_remove)
path_to_remove deleted
Args:
path (Union[str, CloudPath, Path]): Path to be removed
"""
path = AnyPath(path)
if not path.exists():
LOGGER.debug("Non existing %s", path)
elif path.is_dir():
try:
shutil.rmtree(path)
except OSError:
LOGGER.debug("Impossible to remove the directory %s", path, exc_info=True)
elif path.is_file():
try:
path.unlink()
except OSError:
LOGGER.debug("Impossible to remove the file %s", path, exc_info=True)
[docs]def remove_by_pattern(
directory: Union[str, CloudPath, Path],
name_with_wildcard: str = "*",
extension: str = None,
) -> None:
"""
Remove files corresponding to a pattern from a directory.
.. code-block:: python
>>> directory = 'D:/path/to/folder'
>>> os.listdir(directory)
["huhu.exe", "blabla.geojson", "haha.txt", "blabla"]
>>> remove(directory, "blabla*")
>>> os.listdir(directory)
["huhu.exe", "haha.txt"] # Removes also directories
>>> remove(directory, "*", extension="txt")
>>> os.listdir(directory)
["huhu.exe"]
Args:
directory (Union[str, CloudPath, Path]): Directory where to find the files
name_with_wildcard (str): Filename (wildcards accepted)
extension (str): Extension wanted, optional. With or without point. (yaml or .yaml accepted)
"""
directory = AnyPath(directory)
if extension and not extension.startswith("."):
extension = "." + extension
file_list = directory.glob(name_with_wildcard + extension)
for file in file_list:
remove(file)
[docs]def copy(
src: Union[str, CloudPath, Path], dst: Union[str, CloudPath, Path]
) -> Union[CloudPath, Path]:
"""
Copy a file or a directory (recursively) with :code:`copytree` or :code:`copy2`.
.. code-block:: python
>>> src = 'D:/path/to/copy'
>>> dst = 'D:/path/to/output'
>>> copy(src, dst)
copydir 'D:/path/to/output/copy'
>>> src = 'D:/path/to/copy.txt'
>>> dst = 'D:/path/to/output/huhu.txt'
>>> copyfile = copy(src, dst)
'D:/path/to/output/huhu.txt' but with the content of copy.txt
Args:
src (Union[str, CloudPath, Path]): Source Path
dst (Union[str, CloudPath, Path]): Destination Path (file or folder)
Returns:
Union[CloudPath, Path]: New path
"""
src = AnyPath(src)
out = None
try:
if src.is_dir():
out = AnyPath(shutil.copytree(src, dst))
elif os.path.isfile(src):
out = AnyPath(shutil.copy2(src, dst))
except shutil.Error:
LOGGER.debug(exc_info=True)
out = src
# eg. source or destination doesn't exist
except IOError as ex:
raise IOError(f"Copy error: {ex.strerror}") from ex
return out
[docs]def find_files(
names: Union[list, str],
root_paths: Union[list, str, CloudPath, Path],
max_nof_files: int = -1,
get_as_str: bool = False,
) -> Union[list, str]:
"""
Returns matching files recursively from a list of root paths.
Regex are allowed (using glob)
.. code-block:: python
>>> root_path = 'D:/root'
>>> dir1_path = 'D:/root/dir1'
>>> dir2_path = 'D:/root/dir2'
>>> os.listdir(dir1_path)
["haha.txt", "huhu.txt", "hoho.txt"]
>>> os.listdir(dir2_path)
["huhu.txt", "hehe.txt"]
>>> find_files("huhu.txt", root_path)
['D:/root/dir1/huhu.txt', 'D:/root/dir2/huhu.txt']
>>> find_files("huhu.txt", root_path, max_nof_files=1)
['D:/root/dir1/huhu.txt']
>>> find_files("huhu.txt", root_path, max_nof_files=1, get_as_str=True)
found = 'D:/root/dir1/huhu.txt'
Args:
names (Union[list, str]): File names.
root_paths (Union[list, str]): Root paths
max_nof_files (int): Maximum number of files (set to -1 for unlimited)
get_as_str (bool): if only one file is found, it can be retrieved as a string instead of a list
Returns:
list: File name
"""
paths = []
# Transform to list
if not isinstance(names, list):
names = [names]
if not isinstance(root_paths, list):
root_paths = [root_paths]
try:
for root_path in root_paths:
root_path = AnyPath(root_path)
for name in names:
paths += list(root_path.glob(f"**/*{name}*"))
except StopIteration:
pass
# Check if found
if not paths:
raise FileNotFoundError(f"Files {names} not found in {root_paths}")
if max_nof_files > 0:
paths = paths[:max_nof_files]
LOGGER.debug(
"Paths found in %s for filenames %s:\n%s",
root_paths,
names,
pprint.pformat(paths),
)
# Get str if needed
if len(paths) == 1 and get_as_str:
paths = paths[0]
return paths
# subclass JSONDecoder
[docs]class CustomDecoder(JSONDecoder):
"""Decoder for JSON with methods for datetimes"""
# pylint: disable=W0221
# Override the default method
def __init__(self, *args, **kwargs):
json.JSONDecoder.__init__(self, object_hook=self.object_hook, *args, **kwargs)
# pylint: disable=E0202, R0201
# - An attribute defined in json.decoder line 319 hides this method (method-hidden)
# - Method could be a function (no-self-use)
[docs] def object_hook(self, obj: Any):
"""
Overload of object_hook function that deals with :code:`datetime.datetime`
Args:
obj (dict): Dict containing objects to decode from JSON
Returns:
dict: Dict with decoded object
"""
for key, val in obj.items():
if isinstance(val, str):
try:
# Date -> Encoder saves dates as isoformat
obj[key] = date.fromisoformat(val)
except ValueError:
try:
# Datetime -> Encoder saves datetimes as isoformat
obj[key] = datetime.fromisoformat(val)
except ValueError:
obj[key] = val
else:
obj[key] = val
return obj
# subclass JSONEncoder
[docs]class CustomEncoder(JSONEncoder):
"""Encoder for JSON with methods for datetimes and np.int64"""
# pylint: disable=W0221
[docs] def default(self, obj):
"""Overload of the default method"""
if isinstance(obj, (date, datetime)):
out = obj.isoformat()
elif isinstance(obj, (np.int64, np.int32)):
out = int(obj)
elif isinstance(obj, Enum):
out = obj.value
elif isinstance(obj, (CloudPath, Path)):
out = str(obj)
else:
out = json.JSONEncoder.default(self, obj)
return out
[docs]def read_json(json_file: Union[str, CloudPath, Path], print_file: bool = True) -> dict:
"""
Read a JSON file
.. code-block:: python
>>> json_path = 'D:/path/to/json.json'
>>> read_json(json_path, print_file=False)
{"A": 1, "B": 2}
Args:
json_file (Union[str, CloudPath, Path]): Path to JSON file
print_file (bool): Print the configuration file
Returns:
dict: JSON data
"""
with open(json_file) as file:
data = json.load(file, cls=CustomDecoder)
if print_file:
LOGGER.debug(
"Configuration file %s contains:\n%s",
json_file,
json.dumps(data, indent=3, cls=CustomEncoder),
)
return data
[docs]def save_json(output_json: Union[str, CloudPath, Path], json_dict: dict) -> None:
"""
Save a JSON file, with datetime, numpy types and Enum management.
.. code-block:: python
>>> output_json = 'D:/path/to/json.json'
>>> json_dict = {"A": np.int64(1), "B": datetime.today(), "C": SomeEnum.some_name}
>>> save_json(output_json, json_dict)
Args:
output_json (Union[str, CloudPath, Path]): Output file
json_dict (dict): Json dictionary
"""
with open(output_json, "w") as output_config_file:
json.dump(json_dict, output_config_file, indent=3, cls=CustomEncoder)
[docs]def save_obj(obj: Any, path: Union[str, CloudPath, Path]) -> None:
"""
Save an object as a pickle (can save any Python objects).
.. code-block:: python
>>> output_pkl = 'D:/path/to/pickle.pkl'
>>> pkl_dict = {"A": np.ones([3, 3]),
"B": datetime.today(),
"C": SomeEnum.some_name}
>>> save_json(output_pkl, pkl_dict)
Args:
obj (Any): Any object serializable
path (Union[str, CloudPath, Path]): Path where to write the pickle
"""
with open(path, "wb+") as file:
dill.dump(obj, file)
[docs]def load_obj(path: Union[str, CloudPath, Path]) -> Any:
"""
Load a pickled object.
.. code-block:: python
>>> output_pkl = 'D:/path/to/pickle.pkl'
>>> load_obj(output_pkl)
{"A": np.ones([3, 3]), "B": datetime.today(), "C": SomeEnum.some_name}
Args:
path (Union[str, CloudPath, Path]): Path of the pickle
Returns:
object (Any): Pickled object
"""
with open(path, "rb") as file:
return dill.load(file)
# too many arguments
# pylint: disable=R0913
[docs]def get_file_in_dir(
directory: Union[str, CloudPath, Path],
pattern_str: str,
extension: str = None,
filename_only: bool = False,
get_list: bool = False,
exact_name: bool = False,
) -> Union[CloudPath, Path, list]:
"""
Get one or all matching files (pattern + extension) from inside a directory.
Note that the pattern is a regex with glob's convention, ie. :code:`*pattern*`.
If :code:`exact_name` is :code:`False`, the searched pattern will be :code:`*{pattern}*.{extension}`,
else :code:`{pattern}.{extension}`.
.. code-block:: python
>>> directory = 'D:/path/to/dir'
>>> os.listdir(directory)
["haha.txt", "huhu1.txt", "huhu1.geojson", "hoho.txt"]
>>> get_file_in_dir(directory, "huhu")
'D:/path/to/dir/huhu1.geojson'
>>> get_file_in_dir(directory, "huhu", extension="txt")
'D:/path/to/dir/huhu1.txt'
>>> get_file_in_dir(directory, "huhu", get_list=True)
['D:/path/to/dir/huhu1.txt', 'D:/path/to/dir/huhu1.geojson']
>>> get_file_in_dir(directory, "huhu", filename_only=True, get_list=True)
['huhu1.txt', 'huhu1.geojson']
>>> get_file_in_dir(directory, "huhu", get_list=True, exact_name=True)
[]
Args:
directory (str): Directory where to find the files
pattern_str (str): Pattern wanted as a string, with glob's convention.
extension (str): Extension wanted, optional. With or without point. (:code:`yaml` or :code:`.yaml` accepted)
filename_only (bool): Get only the filename
get_list (bool): Get the whole list of matching files
exact_name (bool): Get the exact name (without adding :code:`*` before and after the given pattern)
Returns:
Union[CloudPath, Path, list]: File
"""
directory = AnyPath(directory)
# Glob pattern
if exact_name:
glob_pattern = pattern_str
else:
glob_pattern = "*" + pattern_str + "*"
if extension:
if not extension.startswith("."):
extension = "." + extension
glob_pattern += extension
# Search for the pattern in the directory
file_list = list(directory.glob(glob_pattern))
if len(file_list) == 0:
raise FileNotFoundError(
f"File with pattern {glob_pattern} not found in {directory}"
)
# Return list, file path or file name
if get_list:
file = file_list
else:
if len(file_list) > 1:
LOGGER.warning(
"More than one file corresponding to the pattern %s has been found here %s. "
"Only the first item will be returned.",
glob_pattern,
directory,
)
file = file_list[0]
if filename_only:
file = file.name
return file
# pylint: disable=E1121
[docs]def hash_file_content(file_content: str, len_param: int = 5) -> str:
"""
Hash a file into a unique str.
.. code-block:: python
>>> read_json("path/to/json.json")
{"A": 1, "B": 2}
>>> hash_file_content(str(file_content))
"d3fad5bdf9"
Args:
file_content (str): File content
len_param (int): Length parameter for the hash (length of the key will be 2x this number)
Returns:
str: Hashed file content
"""
hasher = hashlib.shake_256()
hasher.update(str.encode(file_content))
return hasher.hexdigest(len_param)
[docs]def is_writable(dir_path: Union[str, CloudPath, Path]):
"""
Determine whether the directory is writeable or not.
Args:
dir_path (Union[str, CloudPath, Path]): Directory path
Returns:
bool: True if the directory is writable
"""
try:
testfile = tempfile.TemporaryFile(dir=str(dir_path))
testfile.close()
except (OSError, IOError, FileNotFoundError) as e:
if e.errno in [
errno.EACCES,
errno.EEXIST,
errno.EROFS,
errno.ENOENT,
errno.EINVAL,
]: # 2, 13, 17, 30, 22
return False
e.filename = dir_path
raise
return True
