Python文件操作的介绍（代码示例）

import os

rootDir = "/path/to/root"

for parent, dirnames, filenames in os.walk(rootDir):

    for dirname in dirnames:

        print("parent is:" + parent)

        print("dirname is:" + dirname)

    for filename in filenames:

        print("parent is:" + parent)

        print("filename is:" + filename)

        print("the full name of the file is:" + os.path.join(parent, filename))

import os

path = "/root/to/filename.txt"

name, ext = os.path.splitext(path)

print(name, ext)

print(os.path.dirname(path))

print(os.path.basename(path))

f = open("/path/to/file.txt")

# The first method

line = f.readline()

while line:

    print(line)

    line = f.readline()

f.close()

# The second method

for line in open("/path/to/file.txt"):

    print(line)

# The third method

lines = f.readlines()

for line in lines:

    print(line)

output = open("/path/to/file", "w")

# output = open("/path/to/file", "w+")

output.write(all_the_text)

# output.writelines(list_of_text_strings)

import os

os.path.exists("/path/to/file")

os.path.exists("/path/to/dir")

# Only check file

os.path.isfile("/path/to/file")

import os

# Make multilayer directorys

os.makedirs("/path/to/dir")

# Make single directory

os.makedir("/path/to/dir")