jieba>=0.42.1

[:python_version == "3.6"]
chardet<5.0.0

[:python_version > "3.6"]
chardet>=5.0.0

[pdf]

[pdf:python_version <= "3.7"]
pypdf<=4.3.1

[pdf:python_version == "3.6"]
pymupdf<=1.19.3

[pdf:python_version > "3.7"]
pypdf>4.3.1

[pdf:python_version >= "3.7"]
pymupdf>1.19.3
