Python文件循环写入行时防止覆盖的解决方法

 with open(r\'F:\\PythonFiles\\PycharmFile\\ssq.csv\', \'w\', encoding=\'utf-8-sig\', newline=\'\') as csvFile:
   csv.writer(csvFile).writerow([col1,col2,col3,col4,col5,col6,col7,col8,col9,col10,col11]) # 给csv文件中插入一行

 with open(r\'F:\\PythonFiles\\PycharmFile\\ssq.csv\', \'a\', encoding=\'utf-8-sig\', newline=\'\') as csvFile:
   csv.writer(csvFile).writerow([col1,col2,col3,col4,col5,col6,col7,col8,col9,col10,col11]) # 给csv文件中插入一行