如何将python代码应用于文件夹中的多个Excel文件

Question

我是 Python 编程新手。我需要将代码应用于保存在同一文件夹中的多个 Excel 文件。我能怎么做？我尝试使用 os.listdir 但程序给了我一个错误，因为在目录中找不到文件。这是我写的代码：

import openpyxl as xl

from openpyxl.chart import ScatterChart, Reference, Series

import os

folder = r"C:\\Users\\PycharmProjects\\Project\\output"

for file in os.listdir(folder):

    wb = xl.load_workbook(file)
    sheet = wb["Sheet"]
    for row in range(42, sheet.max_row + 1):
        cell = sheet.cell(row, 5)
        cell_num = float(cell.value)
        cell_num_sheet = sheet.cell(row, 5)
        cell_num_sheet.value = cell_num
        cell1 = sheet.cell(row, 8)
        cell1_num = float(cell1.value)
        cell1_num_sheet = sheet.cell(row, 8)
        cell1_num_sheet.value = cell1_num
        chart1 = ScatterChart()
        chart1.title = "Speed of sound [m/s] vs Temperature [°C]"
        chart1.y_axis.title = "Speed of sound [m/s]"
        chart1.x_axis.title = "Temperature [°C]"
        xvalues = Reference(sheet, min_col=8, min_row=42, max_row=sheet.max_row)
        yvalues = Reference(sheet, min_col=5, min_row=42, max_row=sheet.max_row)
        series = Series(values=yvalues, xvalues=xvalues, title="1.5%")
        chart1.series.append(series)
        sheet.add_chart(chart1, "t42")
    wb.save(file)

Answer 1

os.listdir() 只为您提供文件名，而不是完整路径。

代替

for file in os.listdir(folder):
    wb = xl.load_workbook(file)

您需要将文件夹重新加入到路径中：

for file in os.listdir(folder):
    wb = xl.load_workbook(os.path.join(folder, file))