python新建txt文件，并逐行写入数据

#coding=utf-8

txtName = "codingWord.txt"
f=file(txtName, "a+")
for i in range(1,100):
    if i % 2 == 0:
        new_context = "C++" + '
'
        f.write(new_context)
    else:
        new_context = "Python" + '
'
        f.write(new_context)
f.close()


实际应用，合并libsvm所需要格式的两个txt特征值
方法1：
#coding=utf-8

import numpy as np
import os

cwd = os.getcwd()

txtFile1 = cwd + '/first.txt'
txtFile2 = cwd + '/second.txt'
mergeFile2 = cwd + '/mergeTXT.txt'


f = file(mergeFile2, 'a+')
for (index1, line1) in enumerate(open(txtFile1)):
    # print index1, line1
    for (index2, line2) in enumerate(open(txtFile2)):
        if index1 == index2:
            newline = line1 + line2 + '
'
            f.write(newline)
f.close()

方法2：
first=[]
second=[]
f=open('mergeTXT.txt','w')
with open('first.txt', 'r') as f1:
    for line in f1:
        line=line.strip()
        first.append(line)
with open('second.txt', 'r') as f2:
    for line2 in f2:
        line2=line2.strip()
        second.append(line2)
for i in range(0,399):
    result=first[i]+'	'+second[i]+'
'
    f.write(result)