python2学习------基础语法5（文件操作）

1、文件内容读取

      a.txt

teestttttttttttttt
teestttttttttttttt
teestttttttttttttt
teestttttttttttttt
teestttttttttttttt

    readFile.py

# 格式
file = open(文件路径，操作模式);
file.read(); # file.readline(); #按行读取
file.close();
# example
def readText(filePath,mode):
    file = open(filePath,mode); # 打开文件并制定文件操作模式
    #file.seek(6); # 跳过多少字符进行读取
    while True:
        line = file.readline(); # 分行全部读取
        if line == '' or line is None: # 去除空行
            break;
        print line;
    '''
        print file.read(); # 全部读取
    '''
    file.close();
#调用文件读取函数
readText(R"E:a.txt","r")；# 文件路径具体制定    

2、文件内容写入

# 用法
file=open(文件路径,操作权限);
file.write(内容);
file.close();

# example
def writeText(filePath,mode):
    file=open(filePath,mode);
    i=0;
    while i<5:
        file.writelines("teestttttttttttttt
");
        i=i+1;
    file.close();

# 调用函数执行文件创建
writeText(r"E:a.txt","w");

3、显示指定路径下的文件列表

# os模块
os.listdir("指定路径");

# example
#!/usr/bin/python2.7
# __*__ encoding:UTF-8 __*__
import os;
fileDir=os.listdir("./");
for i in fileDir:
    print i;

4、便利指定路径下的文件目录

#!/usr/bin/python2.7
#__*__ coding: UTF-8 __*__
import os;

class FileTest:
    def __init__(self):
        pass;
    def __getFileAndDir__(self,filePath):
        tmp=os.walk(filePath,topdown=True);
        for root,dirs,files in tmp:
            # 遍历输出目录
            for i in dirs:
                print os.path.join(root,i);
            # 遍历输出文件
            for i in files:
                print os.path.join(root,i);
a=FileTest();
a.__getFileAndDir__("F:\test");    

运行结果：

5、待定