python结构化数据_使用python读取文本中结构化数据

需求

read some .txt file in dir and find min and max num in file.

solution:

echo *.txt > file.name in linux shell

>>>execfile(“mytest.py”); //equivalent to run mytest.m in matlab

import os

fileobj = open("./test2images/2d_xxx.name");

filestring = fileobj.readline(); //line is a list stored all .txt name

filestring = filestring.split();

dir = './test2images/'

x = [];

y = [];

for i in filestring:

dataname = open(dir + i);

for j in range(1,15):

data = dataname.readline();

if not data:

break;

data = data.strip('\r\n');

data = data.split(); //It will split the long string line as a list of strings

x.append(int(data[0]));

y.append(int(data[1]));

print min(x)

print min(y)

//normal structure of while circulation

# while 1:

# data = dataname.readline();

# if not data:

# break;

读写中英文参杂的文本

str.decode('utf8') #str先使用utf8的方式解码，得到每个汉字为一个字符

str.encode('utf8') #保存str到文件之前，先使用utf8的方式编码，再存储