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# coding:utf-8
# python 2.7
import csv
import math
import sys
import os
from sys import exit

#平均分割CVS文件   
def deal_csv(head,data,n,filepath):
    name = filepath.split('.')[0]
    line_number = 1000000
    if int(math.ceil(len(data)/float(n)))<=line_number:
        line_number = int(math.ceil(len(data)/float(n)))
    else:
        n = int(math.ceil(len(data)/float(line_number)))
    temp = []
    for i in range(len(data)-1,-1,-1):
        temp.append(data[i])
        if i==(n-1)*line_number:
            reader = csv.writer(open("%s_%d.csv"%(name,n),'wb'))
            reader.writerow(head)
            for line in temp:
                reader.writerow(line)
            n-=1
            temp=[]
    print 'SourceFile -> %s'%(name)
    print 'FilePath -> %s'%(os.getcwd())
    print 'Status -> Success'
#读取文件内容并按行转化成数组
def read_csv(filepath,sign):
    reader = csv.reader(file(filepath,'rb'))
    data = []
    if sign==',':
        for line in reader:
            data.append(line)
    else:
        for line in reader:
            data.append(line[0].split(sign))
    return data
def read_file(filepath,sign):
    file = open(filepath)
    try:
        data = []
        reader = file.readlines()
        for line in reader:
            data.append(line.strip('\n').split(sign))
        return data
    finally: 
        file.close()
        
if __name__=="__main__": 
    data = []
    filepath=''
    sign=''
    if len(sys.argv)==3:
        sign=','
    elif len(sys.argv)==4:
        sign=sys.argv[3]
    else:
        sys.exit()
    #获取文件名
    filepath=sys.argv[1]
    #获取数据
    data = read_file(filepath,sign)
    #获取分割数
    n=int(sys.argv[2])
    deal_csv(data[0],data[1:],n,filepath)