我目前覆盖了名为 rpt.Workbook 的 xlsxwriter.Workbook。想向 xlsxwriter.Worksheet() 添加方法,但由于 xlsxwriter.Workbook() 导入工作表,不确定如何在不发生重大抽搐的情况下完成此操作。目前,我必须将工作表对象作为参数传递。
似乎我需要为 xlsxwriter.Workbook() 编写覆盖方法以指向 xlsxwriter.Worksheet() 的自定义类,但不知道如何做。
这是当前正在使用的覆盖 rpt.Workbook():
####################################################################
class Workbook(xlsxwriter.Workbook):
####################################################################
"""\nSpreadsheet class provides methods to build a spreadsheet.
"""
####################################################################
def __init__(self,filename=None, options={}):
####################################################################
try:
filename = rpt.fname(filename)
except FileNotFoundError as err:
log.error(err)
return False
log.info("Initializing excel file " + filename)
super().__init__(filename,options)
####################################################################
def add_tab(self,name=None,data=None,header=None,
srow=0,scol=0,autocol=True):
####################################################################
"""\nProvides method to add_worksheet and add_table in 1 call.
Required Attribute args:
name = TAB name
header = list of header names
data = list of lists for spreadsheet contents
Optional Attribute args:
srow = starting row for table, default 0
scol = starting col for table, default 0
autocol = True/False, auto set the column sizes
add_tab also adds the worksheet.header attribute to
allow the set_col_by_name function to work
"""
if not data:
log.warning("data=[][] required")
return None
if not header:
log.warning("header=[] required")
return False
columns = []
for field in header:
columns.append({ 'header' : field })
worksheet = self.add_worksheet(name)
worksheet.header = header
tableinfo= {
'data' : data,
'columns' : columns
}
lastcol = scol + (len(header) - 1)
lastrow = srow + (len(data) + 1)
worksheet.add_table(srow,scol,lastrow,lastcol,tableinfo)
#if autocol:
#self.auto_set_columns(worksheet=worksheet,data=data,scol=scol)
worksheet.freeze_panes(0,1)
return worksheet
####################################################################
def auto_set_columns(self,worksheet=None,data=None,header=None,scol=0):
####################################################################
"""\nDetermines the max length of each column and then set
that column width.
Required Attribute args:
worksheet = worksheet object
data = list of lists data
Optional Attribute args:
scol = Column start
header = row of headers for data list of lists.
If header not specified, worksheet
must have been created with self.add_tab()
"""
if not header and worksheet.header:
header = worksheet.header
## table = [] list of lists, combine header and data
table = []
table.append(header) for row in data:
table.append(row)
ziptable = list(zip (*table))
colsizes = []
for idx,val in enumerate(table[0]):
size = max(len(s) for s in ziptable[idx])
colnum = idx + scol
log.debug("Setting column => {} col size => {} => {}".format(colnum,val,size))
worksheet.set_column(colnum,colnum,size)
我想向 xlsxwriter.Worksheet() 添加一个名为 auto_set_columns() 的方法。目前,我必须将工作表对象 (worksheet=worksheet) 作为对象传递才能使其正常工作。我想改用 worksheet.auto_set_columns() 。目前auto_set_columns()是rpt.Workbook的一个方法。
希望 auto_set_columns() 成为 xlsxwriter.Worksheet 的扩展方法。
脚本端使用目前看起来像这样并且有效:
excelfile = nashomes + '/nas_homes.xlsx'
spreadsheet = rpt.Workbook(excelfile)
worksheet = spreadsheet.add_tab(name='Nas Homes',data=hrpt.data,header=hrpt.header)
spreadsheet.auto_set_columns(worksheet=worksheet,data=hrpt.data,scol=0)
我想要的,注意最后一行的变化:
excelfile = nashomes + '/nas_homes.xlsx'
spreadsheet = rpt.Workbook(excelfile)
worksheet = spreadsheet.add_tab(name='Nas Homes',data=hrpt.data,header=hrpt.header)
worksheet.auto_set_columns(data=hrpt.data,scol=0)
此处所需的目标是工作表对象(即 xlsxwriter.Worksheet() )可以具有扩展的“auto_set_columns”方法。但是,由于工作表对象是从 xlsxwriter.Workbook() 类中的 add_worksheet() 方法创建的,因此我无法弄清楚如何在没有主要覆盖方法的情况下将 xlsxwriter.Worksheet() 扩展到 xlsxwriter.Workbook() 。当 Workbook.add_worksheet() 创建 Worksheet 对象时,如何让 xlsxwriter.Workbook() 引用我的扩展 xlsxwriter.Worksheet()?
最佳答案
猴子在从 add_tab 返回之前修补工作表怎么样?
首先在任何类定义之外创建独立函数:
import types
def auto_set_columns(self,data=None,header=None,scol=0):
if not header and self.header:
header = self.header
## table = [] list of lists, combine header and data
table = []
table.append(header)
for row in data:
table.append(row)
ziptable = list(zip (*table))
colsizes = []
for idx,val in enumerate(table[0]):
size = max(len(s) for s in ziptable[idx])
colnum = idx + scol
print "Setting column => {} col size => {} => {}".format(colnum,val,size)
self.set_column(colnum,colnum,size)
然后在您的 Worksheet.add_tab 函数中,在返回之前修补该方法:
....
worksheet.freeze_panes(0,1)
worksheet.auto_set_columns = types.MethodType( auto_set_columns, worksheet )
return worksheet
现在你应该可以运行了:
worksheet = spreadsheet.add_tab(name='Nas Homes',data=hrpt.data,header=hrpt.header)
worksheet.auto_set_columns(data=hrpt.data,scol=0)
关于python - 扩展 xlsxwriter.Worksheet() 类,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/32635770/