def invert_array(content:list, N:int):
    '''Inverting array (rotate)
    from 0 to N-1
    '''
    for k in range(N//2):
        content[k], content[N-1-k] = content[N-1-k], content[k]
    
def read_write():
    ''' readind-writing
    from .txt
    '''
    target = input('Way to the source file ---> ')
    
    with open(target, "r") as file:
        text = file.read()
        #split for array is ','
        content=text.split(',')
    N=len(content)    
    
    invert_array(content, N)
    print(content)
    write_txt= ','.join(map(str, content))
    with open(target, "w") as file:
        file.write(write_txt)
       
read_write()

target = input('Way to the source file ---> ')
    
with open(target, "r") as file:
    text = file.read()
    #split for array is ','
    content=text.split(',')
    
write_txt=content[::-1]
write_txt= ','.join(map(str, write_txt))

with open(target, "w") as file:
    file.write(write_txt)