tarfile压缩模块

tarfile压缩模块

创建文件

import tarfile
"""
	此过程只是创建压缩包 并不打包数据
"""
# 创建压缩包
fp = tarfile.open("ceshi.tar","w",encoding="utf-8")
# 写入文件
"""add(路径,别名)"""
fp.add("2","2tmp")
fp.add("lianxi2","lianxi")
# close file
fp.close()

压缩文件

gz算法

import tarfile
"""
	可以直接通过tar算法打包压缩
"""
# 创建压缩包
fp = tarfile.open("ceshi1.tar.gz","w",encoding="utf-8")
# 写入文件
fp.add("2","2tmp")
fp.add("lianxi2","lianxi")
# close file
fp.close()

bz算法

import tarfile
"""
	可以直接通过tar算法打包压缩
"""
# 创建压缩包
fp = tarfile.open("ceshi1.tar.bz2","w:bz2",encoding="utf-8")
# 写入文件
fp.add("2","2tmp")
fp.add("lianxi2","lianxi")
# close file
fp.close()

解压文件

tf = tarfile.open("ceshi0930_1.tar.gz","r",encoding="utf-8")
""" extract(文件,路径) 解压单个文件"""
tf.extract("chown","ceshi0930_1")
""" extract(路径) 解压所有文件"""
tf.extractall("ceshi0930_1_2")
tf.close()

追加文件

tf = tarfile.open("ceshi0930_0.tar","a",encoding="utf-8")
tf.add("/bin/mkdir","mkdir")
tf.close()

with改造

with tarfile.open("ceshi0930_0.tar","a",encoding="utf-8") as tf:
	tf.add("/bin/mkdir","mkdir234")

查看文件

with tarfile.open("ceshi0930_0.tar","r",encoding="utf-8") as tf:
	lst = tf.getnames()  # return 文件 list
	print(lst)

追加文件改造

import tarfile
import os
import shutil
"""
	可以直接通过tar算法打包压缩
"""
with tarfile.open("2.tar.gz","w:gz",encoding="utf-8") as tf:
	tf.add("1.txt")
	tf.add("2.txt")

"""
	2.tar.gz 文件生成
"""
fileSize = os.path.getsize("2.tar.gz")
print(fileSize) # out 3069

"""
1.把已经压缩的包进行解压
2.把要追加的内容放进去
3.过滤文件重新压缩
"""

# 记录压缩包所在的绝对路径
pathvar1 = os.path.abspath("2.tar.gz")
# 要解压到哪个文件夹中(绝对路径)
pathvar2 = os.path.join(os.getcwd(),"tmp")
print(pathvar1)
print(pathvar2)

# 1.把已经压缩的包进行解压
with tarfile.open(pathvar1,"r",encoding="utf-8") as tf:
	tf.extractall(pathvar2) # 解压的位置

# 2.把要追加的内容放进去
shutil.copy("3.txt" , pathvar2)

# 3.过滤文件重新压缩

# 查看文件夹当中有什么文件
lst = os.listdir(pathvar2)
print(lst) # ['1.txt', '2.txt', '3.txt']

with tarfile.open(pathvar1,"w:bz2",encoding="utf-8") as tf:
	for i in lst:
		if i != "1.txt":
			# 拼凑成所需文件的完整的绝对路径
			abs_path = os.path.join(pathvar2,i)
			# 剩下的都要压缩
			"""add(路径,别名)"""
			tf.add(abs_path,i)
"""
	C:\Users\wbcde\Desktop\pythonProject1\测试\tmp\2.txt
	C:\Users\wbcde\Desktop\pythonProject1\测试\tmp\3.txt
"""