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meta.py
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meta.py
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from .base import BTBaseRow
from .enums import Alignment
class MetaData(BTBaseRow):
def __init__(self, table, row):
for i in row:
self.validate(i)
super(MetaData, self).__init__(table, row)
def __setitem__(self, key, value):
self.validate(value)
super(MetaData, self).__setitem__(key, value)
def validate(self, value):
pass
class AlignmentMetaData(MetaData):
def validate(self, value):
if not isinstance(value, Alignment):
allowed = (
"{}.{}".format(type(self).__name__, i.name) for i in Alignment
)
error_msg = (
"allowed values for alignment are: "
+ ", ".join(allowed)
+ ", was {}".format(value)
)
raise TypeError(error_msg)
class NonNegativeIntegerMetaData(MetaData):
def validate(self, value):
if isinstance(value, int) and value >= 0:
pass
else:
raise TypeError(
("Value must a non-negative integer, " "was {}").format(value)
)