Question

我正在尝试从Excel文件中读取一列，直到它到达一个空单元格，然后它需要停止读取。到目前为止我的代码：

import openpyxl
import os

def main():
    filepath = os.getcwd() + "\test.xlsx"

    wb = openpyxl.load_workbook(filename=filepath, read_only=True)
    ws = wb['Tab2']

    for i in range(2, 1000):
        cellValue = ws.cell(row=i, column=1).Value
        if cellValue != None:
            print(str(i) + " - " + str(cellValue))
        else:
            break;

if __name__ == "__main__":
    main()

通过运行此命令，当它遇到一个空单元格时会出现以下错误。有谁知道我怎么能防止这种情况发生。

Traceback (most recent call last):
  File "testFile.py" in <module>
      main()
      cellValue = sheet.cell(row=i, column=1).value
  File "C:\Python34\lib\openpyxl\worksheet\worksheet.py", line 353, in cell
      cell = self._get_cell(row, column)
  File "C:\Python34\lib\openpyxl\worksheet\read_only.py", line 171, in _get_cell
      cell = tuple(self.get_squared_range(column, row, column, row))[0]
IndexError: tuple index out of range

Answer 1

尝试使用max_row获取最大行数。

from openpyxl import Workbook
from openpyxl import load_workbook

wb = load_workbook('exc_file.xlsx')
ws1 = wb['Sheet1']
for row in range(1,ws1.max_row):
    if(ws1.cell(row,1).value is not None):
            print(ws1.cell(row,1).value)

或者如果你想在达到空值时停止阅读，你可以简单地：

from openpyxl import Workbook
from openpyxl import load_workbook

wb = load_workbook('exc_file.xlsx')
ws1 = wb['Sheet1']
for row in range(1,ws1.max_row):
    if(ws1.cell(row,1).value is None):
        break
    print(ws1.cell(row,1).value)

Answer 2

这说明了我不鼓励使用ws.cell()阅读工作表的原因之一。使用更高级别的API ws.iter_rows()会更好。由于性能原因，ws.iter_cols()无法在只读模式下使用。

for row in ws.iter_rows(min_col=1, max_col=1):
    if cell[0].value is None:
         break
    print("{0}-{1}".format(cell.row, cell.value)

iter_rows应该保证到达行中始终有一个单元格。

Python openpyxl读取直到空单元格

2 个答案: