TLDR-922: replace pylzma by py7zr (#547)

Author: NastyBoget

.gitignore

@@ -11,6 +11,7 @@ dedoc/version.py
 
 # Distribution / packaging
 .Python
+etc/
 env/
 build/
 develop-eggs/

dedoc/readers/archive_reader/archive_reader.py

@@ -85,14 +85,19 @@ def __read_rar_archive(self, path: str, tmp_dir: str, need_content_analysis: boo
                     yield self.__save_archive_file(tmp_dir=tmp_dir, file_name=name, file=file, need_content_analysis=need_content_analysis)
 
     def __read_7z_archive(self, path: str, tmp_dir: str, need_content_analysis: bool) -> Iterator[AttachedFile]:
-        import py7zlib
-
-        with open(path, "rb") as content:
-            arch_file = py7zlib.Archive7z(content)
-            names = arch_file.getnames()
-            for name in names:
-                file = arch_file.getmember(name)
-                yield self.__save_archive_file(tmp_dir=tmp_dir, file_name=name, file=file, need_content_analysis=need_content_analysis)
+        import os
+        import py7zr
+        import tempfile
+
+        with tempfile.TemporaryDirectory() as tmpdir:
+            with py7zr.SevenZipFile(path, "r") as arch_file:
+                arch_file.extractall(tmpdir)
+
+            for dir_path, _, file_names in os.walk(tmpdir):
+                for file_name in file_names:
+                    file_path = os.path.join(dir_path, file_name)
+                    with open(file_path, "rb") as file:
+                        yield self.__save_archive_file(tmp_dir=tmp_dir, file_name=file_name, file=file, need_content_analysis=need_content_analysis)
 
     def __save_archive_file(self, tmp_dir: str, file_name: str, file: IO[bytes], need_content_analysis: bool) -> AttachedFile:
         import os

requirements.txt

@@ -18,7 +18,7 @@ pdf2image==1.10.0 #1.14.0 - there are converting artifacts '№' != '№\n\x0c'
 pdfminer.six>=20211012,<=20231228
 piexif==1.1.3
 puremagic>=1.0,<2.0 # needs libmagic to be installed in the system
-pylzma==0.5.0
+py7zr~=1.0
 pypdf>=4.0,<6.0
 pytesseract==0.3.10
 python-docx==0.8.11

tests/data/with_attachments/attachments.7z

@@ -98,7 +98,7 @@ def test_archive_with_slash(self) -> None:
         Tests attachment extraction from archives with files containing slash symbol in the name
         """
         file_name_template = "attachments.{}"
-        for extension in "7z", "tar", "tar.gz", "zip":
+        for extension in "tar", "tar.gz", "zip":
             file_name = file_name_template.format(extension)
             files = self.__get_list_of_files_in_archive(file_name)
             self.assertEqual(2, len(files))