Python: Manipulating Files

The Python operations Library does not require additional module installation, and the file Operations Class library is an operation supported by the Python language itself.

Determine if file exists: Os.path.isfile (FilePath)

ImportOSImportSYSif __name__=='__main__': FilePath='D:\\ftp\\huawei\\1.txt'        ifOs.path.isfile (filePath):#Os.remove () would remove a file.        #Os.rmdir () would remove an empty directory.        #Shutil.rmtree () would delete a directory and all its contents.Os.remove (FilePath)Print 'file has Exists,was removed ...'            #If the file is not exists'll be created.Fileobj=open (FilePath,'W')    #Loop the list of dir     forFolderinchOs.listdir ('d:\\ftp\\huawei\\20160513'): Fileobj.write (Folder+',')    #if forget to close the file oject,the operate are not flush util the current process exit.fileobj.close ()#Read FileFilereadobj=open ('D:\\ftp\\huawei\\2.txt','R') Filewriterobj=open ('D:\\ftp\\huawei\\3.txt','a') Filewriterobj.write ('---------------------------------------------------------\ r \ n')     forLineinchfilereadobj.readlines (): Filewriterobj.write ('Select'+ line+'ID Union All') Filereadobj.close () filewriterobj.close ()

Resources:

Https://docs.python.org/3/library/os.html#os.remove

Http://www.pythonforbeginners.com/files/reading-and-writing-files-in-python

Python: Manipulating Files