我有一个名为的ExcelFile,他的工作是管理excel文件(读取,提取数据和堆栈中的不同事物)。管理异常处理
我想实现一个管理错误/异常的系统。
例如,ExcelFile为方法负载(),像一个 “设置”
def load(self):
"""
Setup for excel file
Load workbook, worksheet and others characteristics (data lines, header...)
:return: Setup successfully or not
:rtype: bool
Current usage
:Example:
> excefile = ExcelFile('test.xls')
> excefile.load()
True
> excefile.nb_rows()
4
"""
self.workbook = xlrd.open_workbook(self.url)
self.sheet = self.workbook.sheet_by_index(0)
self.header_row_index = self.get_header_row_index()
if self.header_row_index == None: # If file doesn't have header (or not valid)
return False
self.header_fields = self.sheet.row_values(self.header_row_index)
self.header_fields_col_ids = self.get_col_ids(self.header_fields) # Mapping between header fields and col ids
self.nb_rows = self.count_rows()
self.row_start_data = self.header_row_index + self.HEADER_ROWS
return True
正如你可以看到,我会遇到2个型动物错误:
- 的文件不是excel文件(raise xlrd.XLRDError)
- 该文件有一个无效的标题(所以我返回False)
我想实现一个良好的ExcelFile错误管理系统,因为这个类在堆栈中使用了很多。
这是处理我的第一个想法是:
实现一个标准的异常
class ExcelFileException(Exception):
def __init__(self, message, type=None):
self.message = message
self.type = type
def __str__(self):
return "{} : {} ({})".format(self.__class__.__name__, self.message, self.type)
重写负载方法
def load(self):
"""
Setup for excel file
Load workbook, worksheet and others characteristics (data lines, header...)
:return: Setup successfully or not
:rtype: bool
Current usage
:Example:
> excefile = ExcelFile('test.xls')
> excefile.load()
True
> excefile.nb_rows()
4
"""
try:
self.workbook = xlrd.open_workbook(self.url)
except xlrd.XLRDError as e:
raise ExcelFileException("Unsupported file type", e.__class__.__name__)
self.sheet = self.workbook.sheet_by_index(0)
self.header_row_index = self.get_header_row_index()
if self.header_row_index == None: # If file doesn't have header (or not valid)
raise ExcelFileException("Invalid or empty header")
self.header_fields = self.sheet.row_values(self.header_row_index)
self.header_fields_col_ids = self.get_col_ids(self.header_fields) # Mapping between header fields and col ids
self.nb_rows = self.count_rows()
self.row_start_data = self.header_row_index + self.HEADER_ROWS
return True
而且在呼叫方法,这样的例子,一个很大的问题是我必须管理一个名为“报告”的字典,用法语出错,为客户的成功和其他。
...
def foo():
...
file = ExcelFile(location)
try:
file.load()
except ExcelFileException as e:
log.warn(e.__str__())
if e.type == 'XLRDError'
self.report['errors'] = 'Long description of the error, in french (error is about invalid file type)'
else:
self.report['errors'] = 'Long description of the error, in french (error is about invalid header)'
...
您对此有何看法?你有更好的方法吗? 谢谢
谢谢你,但我有一个条件:1)在报告中的信息必须是在法国和非常明确的(为客户的成功和团队的其他成员) – Alexandre
并不是一个很好的办法:'raise ExcelFileException(“Error message”,“French description”)' – Alexandre
如果你有错误信息存储在某个地方,你可以使用一个'dict'和一个法语描述错误信息,类似'report ['errors']。append(your_dict_with_french_descriptions [message])' – user312016