Python将大的csv文件拆分多个小的csv文件

#ecoding=utf-8 import os import time # 2019/9/8 将大的csv文件拆分多个小的csv文件  def mkSubFile(lines, head, srcName, sub):     [des_filename, extname] = os.path.splitext(srcName)     filename = des_filename + '_' + str(sub) + extname     print('make file: %s' % filename)     fout = open(filename, 'w')     try:         fout.writelines([head])         fout.writelines(lines)         return sub + 1     finally:         fout.close()   def splitByLineCount(filename, count):     fin = open(filename,encoding="utf-8")     try:         head = fin.readline()         buf = []         sub = 1         for line in fin:             buf.append(line)             if len(buf) == count:                 sub = mkSubFile(buf, head, filename, sub)                 buf = []         if len(buf) != 0:             sub = mkSubFile(buf, head, filename, sub)     finally:         fin.close()   if __name__ == '__main__':     begin = time.time()     splitByLineCount('training-inspur.csv', 1000)#每个小的csv文件存放1000条     end = time.time()     print('time is %d seconds ' % (end - begin))

来源：博客园

作者：畅玩博客

链接：https://www.cnblogs.com/zyt-bg/p/11486993.html