python提取Excel中的特定列生成新的表格

#coding=utf-8
import xlrd,chardet,traceback,csv

#根据列名获取相应序号
def getColumnIndex(table,columnName):
    columnIndex=None 
    for i in range(table.ncols):
        if(table.cell_value(0,i)==columnName):
            columnIndex=i
            break
    return columnIndex

#根据Excel中sheet名称读取数据
def readExcelDataByName(fileName,sheetName):
    table=None     
    try:
        data=xlrd.open_workbook(fileName)
        table=data.sheet_by_name(sheetName)
    except Exception:
        pass       
    return table

if __name__=='__main__':
    #example
    csv_file=open('房源清单.csv','w+',newline='',encoding='utf-8')
    writer=csv.writer(csv_file)

    fileName=r'/Users/Desktop/python/python生成现金流套表/房源清单-(截止1031）.xlsx'
    sheetName='Sheet1'

    table=readExcelDataByName(fileName,sheetName)

    list=[]   
    for i in range(0,8000):
        try:
            xm=table.cell_value(i,getColumnIndex(table,'项目'))
            cplx=table.cell_value(i,getColumnIndex(table,'产品类型'))
            fymc=table.cell_value(i,getColumnIndex(table,'房源名称'))

        except Exception:
            pass
        list.append([xm,cplx,fymc])

    for row in list:
        writer.writerow(row)

    csv_file.close()

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