127 lines
4.1 KiB
Python
127 lines
4.1 KiB
Python
from pyexcel_io.sheet import SheetReader
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from pyexcel_io.plugins import NEW_READERS
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from pyexcel_io._compact import OrderedDict
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def clean_keywords(keywords):
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sheet_keywords = {}
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native_sheet_keywords = {}
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args_list = [
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"start_row",
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"row_limit",
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"start_column",
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"column_limit",
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"skip_column_func",
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"skip_row_func",
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"skip_empty_rows",
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"row_renderer",
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"keep_trailing_empty_cells",
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]
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for arg in keywords:
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if arg in args_list:
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sheet_keywords[arg] = keywords[arg]
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else:
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native_sheet_keywords[arg] = keywords[arg]
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return sheet_keywords, native_sheet_keywords
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class Reader(object):
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def __init__(self, file_type, library=None):
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self.file_type = file_type
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self.library = library
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self.keywords = None
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# if you know which reader class to use, this attribute allows
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# you to set reader class externally. Since there is no
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# so call private field in Python, I am not going to create
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# useless setter and getter functions like Java.
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# in pyexcel, this attribute is mainly used for testing
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self.reader_class = None
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def open(self, file_name, **keywords):
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if self.reader_class is None:
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self.reader_class = NEW_READERS.get_a_plugin(
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self.file_type, location="file", library=self.library
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)
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self.keywords, native_sheet_keywords = clean_keywords(keywords)
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self.reader = self.reader_class(
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file_name, self.file_type, **native_sheet_keywords
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)
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return self.reader
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def open_content(self, file_content, **keywords):
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self.keywords, native_sheet_keywords = clean_keywords(keywords)
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if self.reader_class is None:
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self.reader_class = NEW_READERS.get_a_plugin(
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self.file_type, location="content", library=self.library
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)
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self.reader = self.reader_class(
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file_content, self.file_type, **native_sheet_keywords
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)
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return self.reader
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def open_stream(self, file_stream, **keywords):
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self.keywords, native_sheet_keywords = clean_keywords(keywords)
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if self.reader_class is None:
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self.reader_class = NEW_READERS.get_a_plugin(
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self.file_type, location="memory", library=self.library
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)
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self.reader = self.reader_class(
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file_stream, self.file_type, **native_sheet_keywords
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)
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return self.reader
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def read_sheet_by_name(self, sheet_name):
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"""
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read a named sheet from a excel data book
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"""
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sheet_names = self.reader.sheet_names()
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index = sheet_names.index(sheet_name)
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return self.read_sheet_by_index(index)
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def read_sheet_by_index(self, sheet_index):
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sheet_reader = self.reader.read_sheet(sheet_index)
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sheet_names = self.reader.sheet_names()
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sheet = EncapsulatedSheetReader(sheet_reader, **self.keywords)
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return {sheet_names[sheet_index]: sheet.to_array()}
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def read_all(self):
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"""
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read everything from a excel data book
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"""
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result = OrderedDict()
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for sheet_index in range(len(self.reader)):
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content_dict = self.read_sheet_by_index(sheet_index)
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result.update(content_dict)
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return result
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def read_many(self, sheets):
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"""
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read everything from a excel data book
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"""
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result = OrderedDict()
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for sheet in sheets:
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if isinstance(sheet, int):
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result.update(self.read_sheet_by_index(sheet))
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else:
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result.update(self.read_sheet_by_name(sheet))
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return result
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def close(self):
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return self.reader.close()
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def __enter__(self):
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return self
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def __exit__(self, a_type, value, traceback):
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self.close()
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class EncapsulatedSheetReader(SheetReader):
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def row_iterator(self):
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yield from self._native_sheet.row_iterator()
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def column_iterator(self, row):
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yield from self._native_sheet.column_iterator(row)
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