class XLSXObject(DataObject):
__identifier__ = "xlsx"
def __init__(self,
resource=None,
fields=None,
sheet=0,
encoding=None,
skip_rows=0,
has_header=True):
"""Creates a XLSX spreadsheet data source stream.
Attributes:
* resource: file name, URL or file-like object
* sheet: sheet index number (as int) or sheet name
* has_header: flag determining whether first line contains header or
not. ``True`` by default.
"""
if isinstance(resource, openpyxl.Workbook):
self.workbook = resource
else:
self.workbook = _load_workbook(resource)
if isinstance(sheet, int):
self.sheet = self.workbook.worksheets[sheet]
elif isinstance(sheet, str):
self.sheet = self.workbook[sheet]
else:
raise ArgumentError('sheet has to be a string or an integer')
if has_header:
self.first_row = skip_rows + 1
else:
self.first_row = skip_rows
if fields:
self.fields = fields
else:
rows = enumerate(self.sheet.rows)
first_row = next(dropwhile(lambda x: x[0] < self.first_row,
rows))[1]
if has_header:
header_row = next(self.sheet.rows)
names = [str(c.value) for c in header_row]
else:
names = ['col%d' % i for i in range(len(first_row))]
self.fields = FieldList()
for name, cell in zip(names, first_row):
if cell.is_date:
storage_type = 'date'
else:
storage_type = CELL_TYPES.get(cell.data_type, 'unknown')
field = Field(name, storage_type=storage_type)
self.fields.append(field)
def _nrows(self):
return sum([1 for _ in self.sheet.rows])
def representations(self):
return ["rows", "records"]
def __len__(self):
return self._nrows() - self.first_row
def rows(self):
if not self.fields:
raise RuntimeError("Fields are not initialized")
field_count = len(self.fields)
rows = enumerate(self.sheet.rows)
rows = dropwhile(lambda x: x[0] < self.first_row, rows)
for _, row in rows:
yield tuple([c.value for c in row[:field_count]])
def records(self):
fields = self.fields.names()
for row in self.rows():
yield dict(zip(fields, row))
def is_consumable(self):
return False
class XLSXObject(DataObject):
__identifier__ = "xlsx"
def __init__(self, resource=None, fields=None, sheet=0,
encoding=None, skip_rows=0, has_header=True,
stop_empty_line=False):
"""Creates a XLSX spreadsheet data source stream.
Attributes:
* fields: `bubbles.metadata.FieldList` to use instead of auto-detection
* resource: file name, URL or file-like object
* sheet: sheet index number (as int) or sheet name
* has_header: flag determining whether first line contains header or
not. ``True`` by default.
* stop_empty_line: flag to stop iteration over rows at the first
encounter with an empty line. As XLSX files can contain millions
or rows, this might cause very long iterations, especially if
all the lines are empty past a certain point
"""
if isinstance(resource, openpyxl.Workbook):
self.workbook = resource
else:
self.workbook = _load_workbook(resource)
if isinstance(sheet, int):
self.sheet = self.workbook.worksheets[sheet]
elif isinstance(sheet, str):
self.sheet = self.workbook[sheet]
else:
raise ArgumentError('sheet has to be a string or an integer')
if has_header:
self.first_row = skip_rows + 1
else:
self.first_row = skip_rows
self.stop_empty_line = stop_empty_line
if fields:
self.fields = fields
else:
rows = enumerate(self.sheet.rows)
first_row = next(dropwhile(lambda x: x[0] < self.first_row,
rows))[1]
if has_header:
header_rows = enumerate(self.sheet.rows)
header_row = next(dropwhile(lambda x: x[0] < (self.first_row - 1),
header_rows))[1]
# fetch names, replace line breaks by spaces in case of
# manual line wrapping
names = [' '.join(str(c.value).split()) for c in header_row]
else:
names = ['col%d' % i for i in range(len(first_row))]
self.fields = FieldList()
for name, cell in zip(names, first_row):
if cell.is_date:
storage_type = 'date'
else:
storage_type = CELL_TYPES.get(cell.data_type, 'unknown')
field = Field(name, storage_type=storage_type)
self.fields.append(field)
def _nrows(self):
return sum([1 for _ in self.sheet.rows])
def representations(self):
return ["rows", "records"]
def __len__(self):
return self._nrows() - self.first_row
def rows(self):
stop_empty = self.stop_empty_line
if not self.fields:
raise RuntimeError("Fields are not initialized")
field_count = len(self.fields)
rows = enumerate(self.sheet.rows)
rows = dropwhile(lambda x: x[0] < self.first_row, rows)
for _, row in rows:
values = [c.value for c in row[:field_count]]
if stop_empty and not any(values):
break
yield tuple(values)
def records(self):
fields = self.fields.names()
for row in self.rows():
yield dict(zip(fields, row))
def is_consumable(self):
return False
