pYthon Utilities.
Project description
安装
$ pip install yu
extractors - 数据提取
数据提取,支持:
Field
SkipField - 直接跳过
PassField - 不做转换
StringField - 字符串,支持长度验证
IntegerField - 整数,支持最大、最小值验证
FloatField - 浮点数
DateField - 日期
RowExtractor
CSVExtractor
示例
csv.extract 的用法:
import csv
from yu.extractors import csv as ce
fields = [
ce.StringField(min_length=2, max_length=4), # 姓名
ce.SkipField(), # 民族
ce.IntegerField(max_value=150), # 年龄
ce.FloatField(min_value=5, max_value=200), # 体重
ce.DateField(), # 生日
ce.PassField(), # 备注
]
with open('data/person.csv') as fp:
reader = csv.reader(fp)
for row in ce.extract(reader, fields=fields):
print(row)
excel.extract 的用法
import xlrd
from yu.extractors import excel as ee
fields = [
ee.StringField(min_length=2, max_length=4), # 姓名
ee.SkipField(), # 民族
ee.IntegerField(max_value=150), # 年龄
ee.FloatField(min_value=5, max_value=200), # 体重
ee.DateField(), # 生日
ee.PassField(), # 备注
]
book = xlrd.open_workbook('data/person.xlsx')
sheet = book.sheet_by_name('person')
for row in ee.extract(sheet, fields=fields):
print(row)
utils - 其他工具
包括
cached_property - 代码来自 Django 项目
InstanceMeta - 类的自动实例化
Instance - 类的自动实例化(继承方式)
InstanceMeta 示例
from yu.utils import InstanceMeta
class Color(metaclass=InstanceMeta, abstract=True):
def __str__(self):
return f'{self.name} = {self.value}'
class Red(Color):
name = 'red'
value = 'FF0000'
class Green(Color):
name = 'green'
value = '00FF00'
print(Red)
print(Green)
修改记录
v0.2.1
2017-12-11 发布里增加 README.md, data/*
v0.2.0
2017-12-10 添加 yu.extractors.excel,处理 Excel 文件的数据提取
v0.1.1
2017-12-09 添加 yu.extractors.csv, 处理 CSV 文件的数据提取
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