[py]py常用模块小结

- python md5校验: https://blog.csdn.net/linda1000/article/details/17581035
import hashlib
hashlib.md5(fcont).hexdigest()

- python改变当前目录: https://blog.csdn.net/flying881114/article/details/6224266
os.chdir("目标目录")
os.getcwd("目标目录")

- python执行命令: http://blog.51cto.com/zhou123/1312791
>>> import commands
>>> a,b = commands.getstatusoutput('ls')




pip: https://pypi.org/project/pip
setuptools: https://pypi.org/project/setuptools/
            https://blog.csdn.net/DongGeGe214/article/details/52199439

            
- chardet使用:https://www.liaoxuefeng.com/wiki/0014316089557264a6b348958f449949df42a6d3a2e542c000/001510905171877ca6fdf08614e446e835ea5d9bce75cf5000
pip install chardet
with open('1.txt') as f:
    upload_text=f.read()
char_check = chardet.detect(upload_text)
file_code = char_check['encoding']

- pyhon转码:
upload_text = upload_text.decode(file_code).encode("utf-8")



    
- python获取参数: https://blog.csdn.net/csdn15698845876/article/details/74909089
import sys
filename = sys.argv[0]
arg1 = sys.argv[1]
arg2 = sys.argv[2]

- python获取文件和路径: https://blog.csdn.net/scelong/article/details/6971917
os.path.basename()
os.path.dirname()

- python拷贝文件: https://www.cnblogs.com/sld666666/archive/2011/01/05/1926282.html
import shutil
shutil.copy(sourceDir,  targetDir)


- Python中进行Base64编码和解码: https://blog.csdn.net/lxdcyh/article/details/4021476
>>> import base64
>>> s = '我是字符串'
>>> a = base64.b64encode(s)
>>> print a
ztLKx9fWt/u0rg==
>>> print base64.b64decode(a)

- python的bz2压缩: https://python-documentation-cn.readthedocs.io/en/latest/library/bz2.html
bz2.compress(data)
bz2.decompress(data)


def get_file_code(file_path):
    "打印路径文件内容base64"
    import chardet
    with open(file_path) as f:
        raw_data = f.read()
    char_check = chardet.detect(raw_data)
    file_code = char_check['encoding']
    return file_code