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1. 前言

由于近期有任务需要,要写一个能够处理Excel的脚本,实现的功能是,在A表格上其中一列,对字符串进行分组和排序,然后根据排序好的A表格以固定格式自动填写到B表格上。

开始写脚本之前查了很多资料,最开始采用了openpyxl这个模块,用起来很顺手,使用这个对A表格其中一列进行了重新填写,但是后来发现,需要用到删除和插入空白行的操作,使用openpyxl比较困难,这个模块仅支持在表格的最后一行继续添加新行,不支持在中间插入和删除行。

在查找的过程中发现,网上流传了一些使用openpyxl进行插入删除行的操作,现整理一下。

2. 使用openpyxl

一种思路是将sheet数据转换成list,然后在list进行操作,这种方法可行,但是实际测试之后发现运行起来速度太慢了,数据1000多条,时间就已经等不起了。

# Creat insert row function group----------------------------------------------
def blankRowInsert(sheet, row_num, add_num):
  myList = Sheet2List(sheet)
  insertLine(myList, row_num, add_num, sheet.max_column)
  List2Sheet(sheet,myList)

def Sheet2List(sheet):
  # 把一个表格中的数据全部导出到一个列表
  listResult = []
  for i in range(1,sheet.max_row + 1):
    lineData = []
    for j in range(1,sheet.max_column +1):
      cell = sheet.cell(row = i, column = j)
      lineData.append(cell.value)
    listResult.append(lineData)
  return listResult

def insertLine(aList, row_num , add_num, maxColumn):
  # 对列表进行添加操作操作
  for _ in range(1,add_num + 1):
    # ['']*N是创建一个个数为N的空格列表,插入列表aList
    aList.insert(row_num, [''] * maxColumn)

def List2Sheet(sheet,list):
  # 把数据写回sheet
  for i in range(1, len(list) + 1):
    for j in range(1, len(list[0]) + 1):
      cell = sheet.cell(row=i, column=j)
      cell.value = list[i-1][j-1]
# End of insert row function group---------------------------------------------

另外一种思路是直接自己给openpyxl这个轮子补胎,添加一个新的方法,笔者没有试验,下面的代码是StackOverflow相关问题上面贴的,如果各位有兴趣可以自己尝试。

def insert_rows(self, row_idx, cnt, above=False, copy_style=True, fill_formulae=True):
  """Inserts new (empty) rows into worksheet at specified row index.

  :param row_idx: Row index specifying where to insert new rows.
  :param cnt: Number of rows to insert.
  :param above: Set True to insert rows above specified row index.
  :param copy_style: Set True if new rows should copy style of immediately above row.
  :param fill_formulae: Set True if new rows should take on formula from immediately above row, filled with references new to rows.

  Usage:

  * insert_rows(2, 10, above=True, copy_style=False)

  """
  CELL_RE = re.compile("(")

  row_idx = row_idx - 1 if above else row_idx

  def replace(m):
    row = m.group('row')
    prefix = "$" if row.find("$") != -1 else ""
    row = int(row.replace("$",""))
    row += cnt if row > row_idx else 0
    return m.group('col') + prefix + str(row)

  # First, we shift all cells down cnt rows...
  old_cells = set()
  old_fas  = set()
  new_cells = dict()
  new_fas  = dict()
  for c in self._cells.values():

    old_coor = c.coordinate

    # Shift all references to anything below row_idx
    if c.data_type == Cell.TYPE_FORMULA:
      c.value = CELL_RE.sub(
        replace,
        c.value
      )
      # Here, we need to properly update the formula references to reflect new row indices
      if old_coor in self.formula_attributes and 'ref' in self.formula_attributes[old_coor]:
        self.formula_attributes[old_coor]['ref'] = CELL_RE.sub(
          replace,
          self.formula_attributes[old_coor]['ref']
        )

    # Do the magic to set up our actual shift  
    if c.row > row_idx:
      old_coor = c.coordinate
      old_cells.add((c.row,c.col_idx))
      c.row += cnt
      new_cells[(c.row,c.col_idx)] = c
      if old_coor in self.formula_attributes:
        old_fas.add(old_coor)
        fa = self.formula_attributes[old_coor].copy()
        new_fas[c.coordinate] = fa

  for coor in old_cells:
    del self._cells[coor]
  self._cells.update(new_cells)

  for fa in old_fas:
    del self.formula_attributes[fa]
  self.formula_attributes.update(new_fas)

  # Next, we need to shift all the Row Dimensions below our new rows down by cnt...
  for row in range(len(self.row_dimensions)-1+cnt,row_idx+cnt,-1):
    new_rd = copy.copy(self.row_dimensions[row-cnt])
    new_rd.index = row
    self.row_dimensions[row] = new_rd
    del self.row_dimensions[row-cnt]

  # Now, create our new rows, with all the pretty cells
  row_idx += 1
  for row in range(row_idx,row_idx+cnt):
    # Create a Row Dimension for our new row
    new_rd = copy.copy(self.row_dimensions[row-1])
    new_rd.index = row
    self.row_dimensions[row] = new_rd
    for col in range(1,self.max_column):
      col = get_column_letter(col)
      cell = self.cell('%s%d'%(col,row))
      cell.value = None
      source = self.cell('%s%d'%(col,row-1))
      if copy_style:
        cell.number_format = source.number_format
        cell.font   = source.font.copy()
        cell.alignment = source.alignment.copy()
        cell.border  = source.border.copy()
        cell.fill   = source.fill.copy()
      if fill_formulae and source.data_type == Cell.TYPE_FORMULA:
        s_coor = source.coordinate
        if s_coor in self.formula_attributes and 'ref' not in self.formula_attributes[s_coor]:
          fa = self.formula_attributes[s_coor].copy()
          self.formula_attributes[cell.coordinate] = fa
        # print("Copying formula from cell %s%d to %s%d"%(col,row-1,col,row))
        cell.value = re.sub(
          "(\$"%(row - 1),
          lambda m: m.group(1) + str(row),
          source.value
        )
        cell.data_type = Cell.TYPE_FORMULA

  # Check for Merged Cell Ranges that need to be expanded to contain new cells
  for cr_idx, cr in enumerate(self.merged_cell_ranges):
    self.merged_cell_ranges[cr_idx] = CELL_RE.sub(
      replace,
      cr
    )

# Use way:
# Worksheet.insert_rows = insert_rows

3. 使用xlwings

进行一些列尝试和折腾之后,笔者放弃了使用openpyxl操作Excel插入和删除行了,到网上寻觅,发现了xlwings这个轮子,说明里写有api能够调用VBA的函数,这就很炫酷了,然后翻了翻文档,决定使用这个轮子操作,现贴出来笔者写的几段代码作为使用方法示范。

3.1. 删除行: range.api.EntireRow.Delete()

# Delete origin row
temp_del = 0
if len(delete_list) > 0:
  for delete_row in delete_list:
    # Report schedule
    print("Have alerady done: " +         str((temp_del*100)//delete_num) + "%")
    # Delete one row
    wb_sheet.range('A'+str(delete_row-temp_del)).api.EntireRow.Delete()
    temp_del = temp_del + 1
wb.save()

上面这段代码使用了一些小技巧,delete_list储存的是原表格中,需要删除的行号,在删除过程中由于总行数也在跟着减少,所以需要把绝对行号转成相对行号进行标记删除,这个转换就是temp_del变量的使用目的。

3.2. 插入行: sheet.api.Rows(row_number).Insert()

if key_word == sheet.range('A'+str(i_row+1)).value:
  # Insert new line
  sheet.api.Rows(i_row+2).Insert()

需要注意的是,这个VBA函数是向上插入空行,并且xlwings这个轮子只能在windows和macos的系统下使用,暂时不支持Linux。不过xlwings运行速度要远超过openpyxl,而且还能直接调用VBA的函数,对于WPS和Excel都能兼容,综合来看,还是选择xlwings比较好一些。

以上这篇Python操作Excel插入删除行的方法就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持。

标签:
Python,Excel,插入,删除

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