python read csv read part of csv file to a new file

#打印前100行
import csv
#读取csv文件
with open("C:\\Users\\****\\Desktop\\pythonp\\chengxu\\shuju\\yellow_tripdata_2010-01.csv", "r", encoding='UTF-8') as f:
        reader = csv.reader(f)
        i=1
        for row in reader:
            if i<100:
            #print(row[0][1])
                print(row)
                i=i+1
        #print(reader[1])


#数据分段 提取n行保存到新的文件  文件和python在同一目录
import csv
fnew = open('数据的前100000000行1.csv','w',encoding='utf-8')
# 2. 基于文件对象构建 csv写入对象
csv_writer = csv.writer(fnew)
#读取csv文件
with open("C:\\Users\\****\\Desktop\\pythonp\\chengxu\\shuju\\yellow_tripdata_2010-01.csv", "r", encoding='UTF-8') as f:
        reader = csv.reader(f)
        i=1
        for row in reader:
            if i<100000000:
            #print(row[0][1])
                #print(row)
                csv_writer.writerow(row)
                i=i+1
                #print(i)
        
fnew.close()