import os
class File:                                  ##File is class name
    def readTextFile(self,filename):
        self.filename = filename
        try:
            self.file = open(filename, 'r')  ## opening the file in reading mode.
        except:
            print('{} not found'.format(self.filename)) ##if file is not found.
            return False
        self.content = self.file.read()      ## readlines() function returns the list of all lines.
        self.file.close()                    ## closeing the file
        return self.content                  ## print the content of text file

    def createNewFile(self,filename='input.txt',content=''):
        self.filename=filename
        self.content=content
        self.filepath='/'.join(filename.split('/')[:-1])  ##spliting filepath from file name
        if self.filepath=='':                             ##If not found then initilize as current directery.
            self.filepath='.'
        self.listOfFile=os.listdir(self.filepath)

        ##checking file already exist or not.
        self.check=False
        if self.filename in self.listOfFile:
            self.message=input('{} already exist. Do you want to overwrite. Y or N:'.format(self.filename))
            if self.message=='Y' or self.message=='y':        ##taking user confermation for overwrite file
                self.check=True
            else:
                self.check=False                              ## If user denied to overwrite file
                print('Copied Failed. Try Again')
        else:
            self.check=True

        if self.check==True:
            self.file = open(filename, 'w')                    ## new opening file
            self.file.write(self.content)                      ## put the content in file
            self.file.close()                                  ##closeing file
            print('Copied Done')

def main():
    f = File()  ##creating objectof 'File' class named as f
    filename1 = input('Enter Source File Name:')  ##taking user input of file name
    content=f.readTextFile(filename1)  ## call the method of File class
    if content is False:
        print('copying failed...Try again')


    ## if source file is found
    else:
        filename2=input('Enter New File Name:')
        ##put the text in new file
        f.createNewFile(filename2,content)


if __name__=='__main__':
    main()


Dependencies of this output:
A text file in current directory  named as 'input.txt'. 
Output:
Enter Source File Name:input.txt
Enter New File Name:output.txt
Copied Done