本文实例讲述了python去除文件中空格、tab及回车的方法。具体如下：
服务端的json文件都是人工写的，写完之后发现格式都是十分规整，易于人阅读的json，但是客户端请求不需要那些为了格式而在json里面添加的空格、tab、回车等等没用的字符，遂用python写一脚本，去除文件中的空格、回车、换行。
原json文件：
{
"amount" : "2",
"content" : [
{ "category_id" : 0,
"name" : "古典文学",
"category_json_url" : "http://172.16.242.14:8080/source/history/history.json"
},
{
"category_id" : 1,
"name" : "流行音乐",
"category_json_url" : "http://172.16.242.14:8080/source//popmusic/popmusic.json"
}
]
}用脚本处理后的文件：
{"amount":"2","content":[{"category_id":0,"name":"古典文学","category_json_url":"http://172.16.242.14:8080/source/history/history.json"},{"category_id":1,"name":"流行音乐","category_json_url":"http://172.16.242.14:8080/source//popmusic/popmusic.json"}]}
下面上代码：
def stripFile(oldFName,newFName):
'''''remove the space or Tab or enter in a file,and output to a new file in the same folder'''
fp = open(oldFName,"r+")
newFp = open(newFName,"w")
for eachline in fp.readlines():
newStr = eachline.replace(" ","").replace("\t","").strip()
#print "Write:",newStr
newFp.write(newStr)
fp.close()
newFp.close()
if __name__ == "__main__":
oldName = raw_input("input file name:")
nameList = oldName.split(".")
newName = "%s%s%s" % (nameList[0],"_new.",nameList[1])
stripFile(oldName,newName)
print "finish output to new file:",newName使用脚本时，如果脚本文件和要处理的文件在同一目录下，则直接输入文件名，如果不在，需要输入文件的完整路径。
